./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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_bresenham-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 d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 19:55:24,008 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:55:24,068 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:55:24,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:55:24,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:55:24,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:55:24,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:55:24,106 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:55:24,107 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:55:24,107 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:55:24,107 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:55:24,107 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:55:24,108 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:55:24,110 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:55:24,110 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:55:24,110 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:55:24,111 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:55:24,111 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:55:24,111 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:55:24,112 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:55:24,112 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:55:24,115 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:55:24,116 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:55:24,116 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:55:24,117 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:55:24,117 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:55:24,117 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:55:24,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:55:24,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:55:24,118 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:55:24,118 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:55:24,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:55:24,121 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:55:24,122 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:55:24,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:55:24,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:55:24,122 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:55:24,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:55:24,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:55:24,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:55:24,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:55:24,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:55:24,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d115e09498e3f278fd539730f0fa55e0745770e0304e10455a14000311085b68 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:55:24,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:55:24,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:55:24,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:55:24,377 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:55:24,377 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:55:24,378 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-20 19:55:25,756 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:55:25,948 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:55:25,948 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_bresenham-ll.c [2024-09-20 19:55:25,958 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8b924520c/3df621e9539949dd943ee2f30790542b/FLAG4f967f9b3 [2024-09-20 19:55:25,969 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8b924520c/3df621e9539949dd943ee2f30790542b [2024-09-20 19:55:25,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:55:25,972 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:55:25,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:55:25,974 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:55:25,979 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:55:25,980 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:55:25" (1/1) ... [2024-09-20 19:55:25,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b882c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:25, skipping insertion in model container [2024-09-20 19:55:25,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:55:25" (1/1) ... [2024-09-20 19:55:26,001 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:55:26,188 WARN L248 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_bresenham-ll.c[1137,1150] [2024-09-20 19:55:26,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:55:26,234 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:55:26,245 WARN L248 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_bresenham-ll.c[1137,1150] [2024-09-20 19:55:26,262 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:55:26,285 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:55:26,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26 WrapperNode [2024-09-20 19:55:26,286 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:55:26,287 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:55:26,287 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:55:26,287 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:55:26,295 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,302 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,309 INFO L138 Inliner]: procedures = 16, calls = 76, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:55:26,309 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:55:26,310 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:55:26,310 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:55:26,310 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:55:26,319 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,325 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,341 INFO L175 MemorySlicer]: Split 46 memory accesses to 8 slices as follows [2, 8, 4, 4, 8, 6, 7, 7]. 17 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0, 0]. The 13 writes are split as follows [0, 3, 2, 2, 1, 2, 1, 2]. [2024-09-20 19:55:26,341 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,341 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,349 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:55:26,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:55:26,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:55:26,361 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:55:26,361 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (1/1) ... [2024-09-20 19:55:26,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:55:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:26,392 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) [2024-09-20 19:55:26,396 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 [2024-09-20 19:55:26,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:55:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:55:26,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:55:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:55:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:55:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 19:55:26,444 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 19:55:26,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:55:26,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:55:26,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:55:26,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 19:55:26,448 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_0_to_41_0 [2024-09-20 19:55:26,449 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_0_to_41_0 [2024-09-20 19:55:26,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:55:26,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:55:26,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:55:26,575 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:55:26,580 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:55:26,831 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 19:55:26,832 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:55:26,857 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:55:26,857 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 19:55:26,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:55:26 BoogieIcfgContainer [2024-09-20 19:55:26,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:55:26,861 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:55:26,862 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:55:26,865 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:55:26,865 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:55:25" (1/3) ... [2024-09-20 19:55:26,866 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dacfd14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:55:26, skipping insertion in model container [2024-09-20 19:55:26,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:55:26" (2/3) ... [2024-09-20 19:55:26,867 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dacfd14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:55:26, skipping insertion in model container [2024-09-20 19:55:26,867 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:55:26" (3/3) ... [2024-09-20 19:55:26,868 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_bresenham-ll.c [2024-09-20 19:55:26,884 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:55:26,885 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:55:26,946 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:55:26,953 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;@5b49b064, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:55:26,953 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:55:26,957 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 19:55:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 19:55:26,969 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:55:26,970 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:55:26,970 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:55:26,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:26,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1584617207, now seen corresponding path program 1 times [2024-09-20 19:55:26,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:55:26,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961410032] [2024-09-20 19:55:26,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:26,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:55:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:55:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [901289688] [2024-09-20 19:55:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:55:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:27,187 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) [2024-09-20 19:55:27,189 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 19:55:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:27,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-09-20 19:55:27,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:55:27,448 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 25 treesize of output 19 [2024-09-20 19:55:27,462 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 [2024-09-20 19:55:27,469 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 [2024-09-20 19:55:27,487 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 [2024-09-20 19:55:27,497 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 [2024-09-20 19:55:27,714 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 27 treesize of output 19 [2024-09-20 19:55:27,725 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 23 treesize of output 15 [2024-09-20 19:55:27,731 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 [2024-09-20 19:55:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:55:27,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:55:27,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:55:27,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961410032] [2024-09-20 19:55:27,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:55:27,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901289688] [2024-09-20 19:55:27,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901289688] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:55:27,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:55:27,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:55:27,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437436698] [2024-09-20 19:55:27,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:55:27,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:55:27,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:55:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:55:27,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:55:27,845 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 19:55:28,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:55:28,111 INFO L93 Difference]: Finished difference Result 63 states and 81 transitions. [2024-09-20 19:55:28,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:55:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 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 12 [2024-09-20 19:55:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:55:28,121 INFO L225 Difference]: With dead ends: 63 [2024-09-20 19:55:28,121 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 19:55:28,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:55:28,126 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 14 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:55:28,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 114 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:55:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 19:55:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-09-20 19:55:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:55:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-09-20 19:55:28,168 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 12 [2024-09-20 19:55:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:55:28,168 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-09-20 19:55:28,168 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 19:55:28,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-09-20 19:55:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 19:55:28,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:55:28,170 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:55:28,188 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 19:55:28,374 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 [2024-09-20 19:55:28,375 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:55:28,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:28,376 INFO L85 PathProgramCache]: Analyzing trace with hash 404436698, now seen corresponding path program 1 times [2024-09-20 19:55:28,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:55:28,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304148561] [2024-09-20 19:55:28,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:28,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:55:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:55:28,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484099835] [2024-09-20 19:55:28,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:28,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:55:28,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:28,513 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) [2024-09-20 19:55:28,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 19:55:28,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:28,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 19:55:28,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:55:28,687 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 [2024-09-20 19:55:28,692 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 [2024-09-20 19:55:28,699 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 25 treesize of output 19 [2024-09-20 19:55:28,731 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 15 [2024-09-20 19:55:28,856 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 27 treesize of output 19 [2024-09-20 19:55:28,863 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 23 treesize of output 15 [2024-09-20 19:55:28,868 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 [2024-09-20 19:55:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:55:28,907 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:55:28,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:55:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304148561] [2024-09-20 19:55:28,907 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:55:28,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484099835] [2024-09-20 19:55:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484099835] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:55:28,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:55:28,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:55:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007312873] [2024-09-20 19:55:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:55:28,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:55:28,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:55:28,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:55:28,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:55:28,912 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:55:29,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:55:29,083 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2024-09-20 19:55:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:55:29,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2024-09-20 19:55:29,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:55:29,086 INFO L225 Difference]: With dead ends: 45 [2024-09-20 19:55:29,086 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 19:55:29,086 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:55:29,090 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:55:29,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:55:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 19:55:29,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 19:55:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:55:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2024-09-20 19:55:29,104 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 22 [2024-09-20 19:55:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:55:29,105 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2024-09-20 19:55:29,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:55:29,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2024-09-20 19:55:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:55:29,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:55:29,106 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:55:29,123 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 19:55:29,307 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 [2024-09-20 19:55:29,307 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:55:29,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:29,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1939087400, now seen corresponding path program 1 times [2024-09-20 19:55:29,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:55:29,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754794768] [2024-09-20 19:55:29,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:29,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:55:29,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:55:29,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1262882972] [2024-09-20 19:55:29,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:29,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:55:29,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:29,380 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) [2024-09-20 19:55:29,385 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 19:55:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:29,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-09-20 19:55:29,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:55:29,556 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 [2024-09-20 19:55:29,560 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 [2024-09-20 19:55:29,563 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 25 treesize of output 19 [2024-09-20 19:55:29,571 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 [2024-09-20 19:55:29,579 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 [2024-09-20 19:55:29,990 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 43 treesize of output 31 [2024-09-20 19:55:36,549 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 [2024-09-20 19:55:36,697 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 27 treesize of output 19 [2024-09-20 19:55:36,702 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 23 treesize of output 15 [2024-09-20 19:55:36,706 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 26 treesize of output 14 [2024-09-20 19:55:36,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:55:36,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:55:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:55:37,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:55:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754794768] [2024-09-20 19:55:37,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:55:37,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262882972] [2024-09-20 19:55:37,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262882972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:55:37,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:55:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 22 [2024-09-20 19:55:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237625202] [2024-09-20 19:55:37,322 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:55:37,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:55:37,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:55:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:55:37,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=395, Unknown=1, NotChecked=0, Total=462 [2024-09-20 19:55:37,326 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:55:38,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:55:38,323 INFO L93 Difference]: Finished difference Result 56 states and 65 transitions. [2024-09-20 19:55:38,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-20 19:55:38,325 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 6 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 24 [2024-09-20 19:55:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:55:38,326 INFO L225 Difference]: With dead ends: 56 [2024-09-20 19:55:38,326 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 19:55:38,327 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=144, Invalid=785, Unknown=1, NotChecked=0, Total=930 [2024-09-20 19:55:38,327 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:55:38,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 134 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:55:38,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 19:55:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 49. [2024-09-20 19:55:38,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 19:55:38,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2024-09-20 19:55:38,351 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2024-09-20 19:55:38,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:55:38,351 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2024-09-20 19:55:38,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 8 states have call successors, (10), 6 states have call predecessors, (10), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 19:55:38,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:38,352 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2024-09-20 19:55:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:55:38,353 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:55:38,354 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, 1, 1, 1, 1, 1, 1] [2024-09-20 19:55:38,372 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 19:55:38,558 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 [2024-09-20 19:55:38,559 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:55:38,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:55:38,559 INFO L85 PathProgramCache]: Analyzing trace with hash 674694001, now seen corresponding path program 1 times [2024-09-20 19:55:38,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:55:38,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414291080] [2024-09-20 19:55:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:38,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:55:38,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:55:38,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2146387489] [2024-09-20 19:55:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:55:38,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:55:38,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:55:38,665 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) [2024-09-20 19:55:38,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:55:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:55:38,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 161 conjuncts are in the unsatisfiable core [2024-09-20 19:55:38,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:55:38,906 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 [2024-09-20 19:55:38,911 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 [2024-09-20 19:55:38,915 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 [2024-09-20 19:55:38,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2024-09-20 19:55:38,930 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 [2024-09-20 19:55:38,953 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 15 [2024-09-20 19:55:39,690 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 21 treesize of output 17 [2024-09-20 19:55:39,720 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 21 treesize of output 17 [2024-09-20 19:55:41,175 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 52 treesize of output 36 [2024-09-20 19:55:41,190 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 [2024-09-20 19:55:41,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,346 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 25 treesize of output 29 [2024-09-20 19:55:41,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-09-20 19:55:41,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,389 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 73 treesize of output 61 [2024-09-20 19:55:41,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,410 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 21 treesize of output 25 [2024-09-20 19:55:41,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,427 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 17 treesize of output 21 [2024-09-20 19:55:41,457 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,458 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 50 treesize of output 42 [2024-09-20 19:55:41,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:55:41,475 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 17 treesize of output 21 [2024-09-20 19:55:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:55:41,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:55:47,920 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 114 treesize of output 106 [2024-09-20 19:55:47,932 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 106 treesize of output 94 [2024-09-20 19:55:47,944 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 94 treesize of output 78 [2024-09-20 19:55:52,037 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|) |c_func_to_recursive_line_0_to_41_0_#in~x.offset|)) (.cse0 (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4| Int)) (let ((.cse12 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|)) (.cse11 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|))) (= (+ (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4|) (* (* .cse11 .cse12) 2) (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|)) (let ((.cse13 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4|))) (+ (* (* .cse13 .cse12) 2) (* 2 .cse13) (* .cse11 2)))))))) (and (or (< .cse0 .cse1) .cse2) (forall ((|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4| Int)) (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_4|))) (let ((.cse3 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_4|)) (.cse7 (* 2 .cse6))) (or (not (let ((.cse4 (select (select |c_old(#memory_int#7)| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|)) (.cse5 (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|))) (= (+ .cse3 (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|) (* 2 (* .cse4 .cse5))) (+ (* (* .cse4 .cse6) 2) (* 2 .cse5) .cse7)))) (let ((.cse9 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_4|)) (.cse8 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_4|))) (= (+ .cse3 (* (* .cse8 .cse9) 2) (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_4|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_4|)) (+ (* (* .cse6 .cse9) 2) .cse7 (* .cse8 2)))))))) (or (= (let ((.cse10 (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|))) (+ (* 2 .cse10) (* 2 (* .cse10 .cse1)))) (+ (* 2 (* .cse0 (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|) |c_func_to_recursive_line_0_to_41_0_#in~y.offset|))) .cse0 (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|) |c_func_to_recursive_line_0_to_41_0_#in~v.offset|))) .cse2))) is different from false [2024-09-20 19:55:57,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:55:57,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414291080] [2024-09-20 19:55:57,336 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:55:57,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146387489] [2024-09-20 19:55:57,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146387489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:55:57,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:55:57,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-20 19:55:57,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010113873] [2024-09-20 19:55:57,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:55:57,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 19:55:57,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:55:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 19:55:57,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=671, Unknown=2, NotChecked=52, Total=812 [2024-09-20 19:55:57,339 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 20 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:56:01,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:01,346 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2024-09-20 19:56:01,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:56:01,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-09-20 19:56:01,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:01,349 INFO L225 Difference]: With dead ends: 59 [2024-09-20 19:56:01,349 INFO L226 Difference]: Without dead ends: 49 [2024-09-20 19:56:01,350 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=194, Invalid=1448, Unknown=2, NotChecked=78, Total=1722 [2024-09-20 19:56:01,350 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:01,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 74 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 19:56:01,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-20 19:56:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-20 19:56:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (13), 7 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 19:56:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2024-09-20 19:56:01,382 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 36 [2024-09-20 19:56:01,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:01,382 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2024-09-20 19:56:01,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.4375) internal successors, (23), 15 states have internal predecessors, (23), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:56:01,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2024-09-20 19:56:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 19:56:01,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:01,384 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, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:01,404 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:56:01,584 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 [2024-09-20 19:56:01,584 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:01,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:01,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1097395827, now seen corresponding path program 1 times [2024-09-20 19:56:01,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:01,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275598351] [2024-09-20 19:56:01,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:01,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:01,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:01,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1217927179] [2024-09-20 19:56:01,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:01,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:01,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:01,653 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) [2024-09-20 19:56:01,657 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:56:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:01,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 146 conjuncts are in the unsatisfiable core [2024-09-20 19:56:01,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:01,814 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 [2024-09-20 19:56:01,820 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 [2024-09-20 19:56:01,826 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 [2024-09-20 19:56:01,830 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 [2024-09-20 19:56:02,468 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 77 treesize of output 66 [2024-09-20 19:56:02,667 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 48 treesize of output 44 [2024-09-20 19:56:02,674 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 44 treesize of output 40 [2024-09-20 19:56:02,678 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 11 treesize of output 7 [2024-09-20 19:56:03,029 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 [2024-09-20 19:56:03,037 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 [2024-09-20 19:56:03,127 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 28 treesize of output 16 [2024-09-20 19:56:03,132 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 17 treesize of output 9 [2024-09-20 19:56:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:56:03,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:09,431 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 101 treesize of output 93 [2024-09-20 19:56:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275598351] [2024-09-20 19:56:44,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217927179] [2024-09-20 19:56:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217927179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:56:44,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:56:44,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 19:56:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73174759] [2024-09-20 19:56:44,749 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:56:44,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:56:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:44,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:56:44,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=713, Unknown=8, NotChecked=0, Total=812 [2024-09-20 19:56:44,751 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:56:52,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:52,978 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2024-09-20 19:56:52,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 19:56:52,979 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2024-09-20 19:56:52,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:52,980 INFO L225 Difference]: With dead ends: 57 [2024-09-20 19:56:52,980 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:56:52,981 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=187, Invalid=1364, Unknown=9, NotChecked=0, Total=1560 [2024-09-20 19:56:52,984 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:52,984 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 68 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 19:56:52,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:56:53,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2024-09-20 19:56:53,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-20 19:56:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2024-09-20 19:56:53,020 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 36 [2024-09-20 19:56:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:53,020 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2024-09-20 19:56:53,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 6 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 19:56:53,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2024-09-20 19:56:53,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:56:53,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:53,022 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:53,036 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 19:56:53,222 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 [2024-09-20 19:56:53,223 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:53,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash 18206728, now seen corresponding path program 2 times [2024-09-20 19:56:53,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:53,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47002283] [2024-09-20 19:56:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:53,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:53,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:53,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1529266770] [2024-09-20 19:56:53,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:56:53,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:53,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:53,341 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) [2024-09-20 19:56:53,342 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:56:53,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:56:53,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:56:53,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-20 19:56:53,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:53,557 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 [2024-09-20 19:56:53,565 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 25 treesize of output 19 [2024-09-20 19:56:53,586 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 [2024-09-20 19:56:53,599 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 [2024-09-20 19:56:53,620 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 [2024-09-20 19:56:53,696 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 15 [2024-09-20 19:56:57,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2024-09-20 19:56:57,595 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 19 treesize of output 11 [2024-09-20 19:56:57,790 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 34 treesize of output 22 [2024-09-20 19:56:57,802 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 [2024-09-20 19:56:57,812 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 23 [2024-09-20 19:56:58,272 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:56:58,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:57:05,429 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 84 treesize of output 72 [2024-09-20 19:57:05,452 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 72 treesize of output 64 [2024-09-20 19:57:05,474 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 64 treesize of output 56 [2024-09-20 19:57:47,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:57:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47002283] [2024-09-20 19:57:47,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:57:47,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529266770] [2024-09-20 19:57:47,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529266770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:57:47,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:57:47,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 19:57:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731889752] [2024-09-20 19:57:47,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:57:47,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:57:47,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:57:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:57:47,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=730, Unknown=6, NotChecked=0, Total=812 [2024-09-20 19:57:47,062 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 19:58:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:58:01,358 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-09-20 19:58:01,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:58:01,360 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2024-09-20 19:58:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:58:01,361 INFO L225 Difference]: With dead ends: 59 [2024-09-20 19:58:01,361 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 19:58:01,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=132, Invalid=1267, Unknown=7, NotChecked=0, Total=1406 [2024-09-20 19:58:01,363 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-20 19:58:01,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 106 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-09-20 19:58:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 19:58:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-09-20 19:58:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-20 19:58:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-20 19:58:01,395 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 50 [2024-09-20 19:58:01,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:58:01,395 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-20 19:58:01,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 19:58:01,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-20 19:58:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:58:01,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:58:01,397 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:58:01,414 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 19:58:01,598 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 [2024-09-20 19:58:01,598 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:58:01,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:58:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1787231606, now seen corresponding path program 1 times [2024-09-20 19:58:01,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:58:01,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255811228] [2024-09-20 19:58:01,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:01,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:58:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:03,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:58:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:03,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:58:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:08,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:58:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:08,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:58:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:12,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:58:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:12,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 19:58:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:14,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:58:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-20 19:58:14,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:14,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255811228] [2024-09-20 19:58:14,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255811228] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:14,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094009203] [2024-09-20 19:58:14,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:58:14,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:58:14,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:58:14,321 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) [2024-09-20 19:58:14,322 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:58:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:58:14,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-20 19:58:14,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:58:14,556 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 [2024-09-20 19:58:14,588 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 [2024-09-20 19:58:14,620 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 [2024-09-20 19:58:14,671 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 [2024-09-20 19:58:14,748 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 15 [2024-09-20 19:58:18,461 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 44 treesize of output 21 [2024-09-20 19:58:18,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:58:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 19:58:24,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:58:46,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094009203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:58:46,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:58:46,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 49 [2024-09-20 19:58:46,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065039111] [2024-09-20 19:58:46,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:46,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 19:58:46,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:46,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 19:58:46,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2094, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 19:58:46,124 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 49 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 18 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-20 19:59:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:00,727 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2024-09-20 19:59:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:59:00,728 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 18 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) Word has length 50 [2024-09-20 19:59:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:00,729 INFO L225 Difference]: With dead ends: 63 [2024-09-20 19:59:00,729 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 19:59:00,730 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=362, Invalid=2944, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 19:59:00,731 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:00,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 117 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2024-09-20 19:59:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 19:59:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2024-09-20 19:59:00,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-20 19:59:00,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-20 19:59:00,759 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2024-09-20 19:59:00,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:00,759 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-20 19:59:00,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 39 states have (on average 1.641025641025641) internal successors, (64), 43 states have internal predecessors, (64), 18 states have call successors, (20), 8 states have call predecessors, (20), 9 states have return successors, (18), 14 states have call predecessors, (18), 17 states have call successors, (18) [2024-09-20 19:59:00,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:00,760 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-20 19:59:00,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 19:59:00,761 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:00,761 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:00,775 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:59:00,962 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 [2024-09-20 19:59:00,962 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:00,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:00,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1663730188, now seen corresponding path program 2 times [2024-09-20 19:59:00,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:00,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476993498] [2024-09-20 19:59:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:00,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:01,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724656745] [2024-09-20 19:59:01,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:59:01,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:01,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:01,020 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) [2024-09-20 19:59:01,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:59:01,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:59:01,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:59:01,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 180 conjuncts are in the unsatisfiable core [2024-09-20 19:59:01,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:01,308 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 [2024-09-20 19:59:01,329 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 15 treesize of output 1 [2024-09-20 19:59:01,350 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 [2024-09-20 19:59:01,391 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 25 treesize of output 19 [2024-09-20 19:59:01,435 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 [2024-09-20 19:59:01,605 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 15 [2024-09-20 19:59:08,738 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 11 treesize of output 7 [2024-09-20 19:59:11,739 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 [2024-09-20 19:59:11,816 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 [2024-09-20 19:59:11,860 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 50 treesize of output 39 [2024-09-20 19:59:12,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-20 19:59:12,378 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 28 treesize of output 16 [2024-09-20 19:59:13,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:59:13,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:30,094 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 78 treesize of output 62 [2024-09-20 19:59:30,124 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 62 treesize of output 54 [2024-09-20 19:59:30,154 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 54 treesize of output 50 [2024-09-20 19:59:34,369 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~x.base|))) (let ((.cse4 (select (select |c_#memory_int#6| |c_func_to_recursive_line_0_to_41_0_#in~X.base|) |c_func_to_recursive_line_0_to_41_0_#in~X.offset|)) (.cse8 (select .cse7 |c_func_to_recursive_line_0_to_41_0_#in~x.offset|))) (and (forall ((|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_25| Int)) (let ((.cse6 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_21|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_21|))) (let ((.cse0 (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30|)) (.cse5 (* .cse6 2))) (or (not (let ((.cse2 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~y.base| (let ((.cse9 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_0_to_41_0_#in~y.base|))) (store .cse9 |c_func_to_recursive_line_0_to_41_0_#in~y.offset| (+ 1 (select .cse9 |c_func_to_recursive_line_0_to_41_0_#in~y.offset|))))) |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_17|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_17|)) (.cse1 (select (select (store |c_old(#memory_int#7)| |c_func_to_recursive_line_0_to_41_0_#in~x.base| (store .cse7 |c_func_to_recursive_line_0_to_41_0_#in~x.offset| (+ .cse8 1))) |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_30|))) (= (+ .cse0 (* 2 (* .cse1 .cse2)) (select (select (store |c_old(#memory_int#1)| |c_func_to_recursive_line_0_to_41_0_#in~v.base| (let ((.cse3 (select |c_old(#memory_int#1)| |c_func_to_recursive_line_0_to_41_0_#in~v.base|))) (store .cse3 |c_func_to_recursive_line_0_to_41_0_#in~v.offset| (+ (* (- 2) .cse4) (* 2 (select (select |c_#memory_int#4| |c_func_to_recursive_line_0_to_41_0_#in~Y.base|) |c_func_to_recursive_line_0_to_41_0_#in~Y.offset|)) (select .cse3 |c_func_to_recursive_line_0_to_41_0_#in~v.offset|))))) |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_25|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_25|)) (+ .cse5 (* 2 .cse2) (* 2 (* .cse1 .cse6)))))) (let ((.cse10 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_17|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_17|)) (.cse11 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_30|))) (= (+ (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_25|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_25|) .cse0 (* 2 (* .cse10 .cse11))) (+ (* .cse10 2) .cse5 (* (* .cse6 .cse11) 2)))))))) (or (forall ((|v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_17| Int) (|v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_21| Int) (|v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_25| Int)) (let ((.cse12 (select (select |c_#memory_int#5| |v_func_to_recursive_line_0_to_41_0_#in~y.base_BEFORE_CALL_17|) |v_func_to_recursive_line_0_to_41_0_#in~y.offset_BEFORE_CALL_17|)) (.cse13 (select (select |c_#memory_int#7| |v_func_to_recursive_line_0_to_41_0_#in~x.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~x.offset_BEFORE_CALL_30|))) (= (+ (select (select |c_#memory_int#1| |v_func_to_recursive_line_0_to_41_0_#in~v.base_BEFORE_CALL_25|) |v_func_to_recursive_line_0_to_41_0_#in~v.offset_BEFORE_CALL_25|) (select (select |c_#memory_int#6| |v_func_to_recursive_line_0_to_41_0_#in~X.base_BEFORE_CALL_30|) |v_func_to_recursive_line_0_to_41_0_#in~X.offset_BEFORE_CALL_30|) (* 2 (* .cse12 .cse13))) (let ((.cse14 (select (select |c_#memory_int#4| |v_func_to_recursive_line_0_to_41_0_#in~Y.base_BEFORE_CALL_21|) |v_func_to_recursive_line_0_to_41_0_#in~Y.offset_BEFORE_CALL_21|))) (+ (* .cse12 2) (* .cse14 2) (* (* .cse14 .cse13) 2)))))) (= .cse4 .cse8))))) is different from false [2024-09-20 19:59:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476993498] [2024-09-20 19:59:36,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724656745] [2024-09-20 19:59:36,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724656745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:59:36,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:59:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 19:59:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108955049] [2024-09-20 19:59:36,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:59:36,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 19:59:36,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 19:59:36,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=681, Unknown=1, NotChecked=52, Total=812 [2024-09-20 19:59:36,831 INFO L87 Difference]: Start difference. First operand 53 states and 64 transitions. Second operand has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 19:59:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:46,364 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-09-20 19:59:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:59:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2024-09-20 19:59:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:46,367 INFO L225 Difference]: With dead ends: 61 [2024-09-20 19:59:46,367 INFO L226 Difference]: Without dead ends: 55 [2024-09-20 19:59:46,367 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=135, Invalid=1200, Unknown=1, NotChecked=70, Total=1406 [2024-09-20 19:59:46,368 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:46,368 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 90 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2024-09-20 19:59:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-20 19:59:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2024-09-20 19:59:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (17), 9 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-20 19:59:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2024-09-20 19:59:46,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 64 transitions. Word has length 50 [2024-09-20 19:59:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:46,397 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 64 transitions. [2024-09-20 19:59:46,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 19 states have internal predecessors, (29), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 19:59:46,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 64 transitions. [2024-09-20 19:59:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 19:59:46,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:46,399 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:46,418 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 19:59:46,599 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 [2024-09-20 19:59:46,600 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:46,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:46,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1218196061, now seen corresponding path program 2 times [2024-09-20 19:59:46,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:46,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64864927] [2024-09-20 19:59:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:46,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:47,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:59:47,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:47,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:59:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat