./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-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_cohendiv-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 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae --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 19:56:17,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:56:17,694 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:56:17,698 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:56:17,700 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:56:17,729 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:56:17,730 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:56:17,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:56:17,731 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:56:17,732 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:56:17,732 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:56:17,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:56:17,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:56:17,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:56:17,735 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:56:17,736 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:56:17,736 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:56:17,736 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:56:17,737 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:56:17,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:56:17,737 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:56:17,741 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:56:17,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:56:17,741 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:56:17,742 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:56:17,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:56:17,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:56:17,742 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:56:17,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:56:17,744 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:56:17,744 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:56:17,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:56:17,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:56:17,745 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:56:17,745 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:56:17,746 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:56:17,746 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:56:17,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:56:17,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:56:17,747 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:56:17,747 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:56:17,748 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:56:17,748 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c6261a52ba91bad3864c182e4633afd262bc5fe07cf18f92cb66db83623b9ae Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:56:17,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:56:18,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:56:18,023 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:56:18,025 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:56:18,025 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:56:18,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-20 19:56:19,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:56:19,661 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:56:19,662 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_cohendiv-ll.c [2024-09-20 19:56:19,668 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/14a81a48c/eb9a32a82a2b445684886d8398a087cd/FLAG5408f7bcf [2024-09-20 19:56:20,050 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/14a81a48c/eb9a32a82a2b445684886d8398a087cd [2024-09-20 19:56:20,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:56:20,053 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:56:20,055 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:56:20,055 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:56:20,059 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:56:20,060 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,061 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@578bb4ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20, skipping insertion in model container [2024-09-20 19:56:20,061 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,081 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:56:20,260 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_cohendiv-ll.c[1136,1149] [2024-09-20 19:56:20,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:56:20,297 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:56:20,308 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_cohendiv-ll.c[1136,1149] [2024-09-20 19:56:20,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:56:20,340 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:56:20,340 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20 WrapperNode [2024-09-20 19:56:20,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:56:20,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:56:20,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:56:20,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:56:20,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,356 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,362 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:56:20,363 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:56:20,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:56:20,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:56:20,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:56:20,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,392 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 10, 8, 6, 8, 10, 5]. 20 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 3, 2, 3, 1, 1]. [2024-09-20 19:56:20,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,392 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,404 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,407 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,412 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,416 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:56:20,417 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:56:20,417 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:56:20,417 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:56:20,418 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (1/1) ... [2024-09-20 19:56:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:56:20,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:20,450 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 19:56:20,454 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 19:56:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:56:20,504 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-20 19:56:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-20 19:56:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:56:20,505 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:56:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:56:20,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:56:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 19:56:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 19:56:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 19:56:20,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 19:56:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_52_0 [2024-09-20 19:56:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_52_0 [2024-09-20 19:56:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_32_to_55_0 [2024-09-20 19:56:20,509 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_32_to_55_0 [2024-09-20 19:56:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 19:56:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 19:56:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 19:56:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 19:56:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 19:56:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 19:56:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 19:56:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:56:20,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:56:20,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:56:20,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:56:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:56:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:56:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 19:56:20,512 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 19:56:20,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 19:56:20,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 19:56:20,514 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 19:56:20,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:56:20,515 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:56:20,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:56:20,639 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:56:20,641 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:56:20,975 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 19:56:20,975 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:56:20,994 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:56:20,994 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:56:20,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:56:20 BoogieIcfgContainer [2024-09-20 19:56:20,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:56:20,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:56:20,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:56:21,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:56:21,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:56:20" (1/3) ... [2024-09-20 19:56:21,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a8f0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:56:21, skipping insertion in model container [2024-09-20 19:56:21,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:56:20" (2/3) ... [2024-09-20 19:56:21,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53a8f0e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:56:21, skipping insertion in model container [2024-09-20 19:56:21,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:56:20" (3/3) ... [2024-09-20 19:56:21,003 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_cohendiv-ll.c [2024-09-20 19:56:21,019 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:56:21,020 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:56:21,072 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:56:21,078 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;@3ac6abc7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:56:21,079 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:56:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-20 19:56:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 19:56:21,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:21,091 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:21,091 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:21,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:21,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1731301129, now seen corresponding path program 1 times [2024-09-20 19:56:21,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:21,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956650663] [2024-09-20 19:56:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:21,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1854180951] [2024-09-20 19:56:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:21,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:21,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:21,314 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 19:56:21,315 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 19:56:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:21,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 19:56:21,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:21,510 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 19:56:21,518 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 19:56:21,671 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 19:56:21,671 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:56:21,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:21,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956650663] [2024-09-20 19:56:21,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854180951] [2024-09-20 19:56:21,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854180951] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:56:21,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:56:21,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:56:21,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454513115] [2024-09-20 19:56:21,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:21,681 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:56:21,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:21,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:56:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:56:21,713 INFO L87 Difference]: Start difference. First operand has 50 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:56:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:21,968 INFO L93 Difference]: Finished difference Result 108 states and 152 transitions. [2024-09-20 19:56:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:56:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2024-09-20 19:56:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:21,980 INFO L225 Difference]: With dead ends: 108 [2024-09-20 19:56:21,982 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 19:56:21,986 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:56:21,991 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 15 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:21,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 310 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:56:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 19:56:22,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2024-09-20 19:56:22,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 19:56:22,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2024-09-20 19:56:22,040 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 18 [2024-09-20 19:56:22,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:22,041 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2024-09-20 19:56:22,041 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 19:56:22,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2024-09-20 19:56:22,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:56:22,044 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:22,044 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, 1, 1] [2024-09-20 19:56:22,059 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:56:22,245 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 19:56:22,245 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:22,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:22,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1578239580, now seen corresponding path program 1 times [2024-09-20 19:56:22,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:22,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910704099] [2024-09-20 19:56:22,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:22,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:22,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650273251] [2024-09-20 19:56:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:22,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:22,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:22,311 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 19:56:22,314 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 19:56:22,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:22,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 19:56:22,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:22,454 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 19:56:22,456 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 19:56:22,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:22,469 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 19:56:22,659 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 19:56:22,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 19:56:22,672 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 7 treesize of output 3 [2024-09-20 19:56:22,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 19:56:22,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:22,899 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 19:56:22,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910704099] [2024-09-20 19:56:22,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:22,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650273251] [2024-09-20 19:56:22,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650273251] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:56:22,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:56:22,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 19:56:22,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655249875] [2024-09-20 19:56:22,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:22,901 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:56:22,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:22,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:56:22,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:56:22,915 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:56:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:23,179 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-20 19:56:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:56:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-09-20 19:56:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:23,182 INFO L225 Difference]: With dead ends: 68 [2024-09-20 19:56:23,182 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 19:56:23,183 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:56:23,183 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 15 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:23,184 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 277 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:56:23,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 19:56:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-20 19:56:23,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.105263157894737) internal successors, (42), 41 states have internal predecessors, (42), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2024-09-20 19:56:23,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2024-09-20 19:56:23,206 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 24 [2024-09-20 19:56:23,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:23,206 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2024-09-20 19:56:23,207 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 19:56:23,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:23,207 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2024-09-20 19:56:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 19:56:23,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:23,208 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:23,225 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 19:56:23,412 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 19:56:23,413 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:23,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:23,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1582649267, now seen corresponding path program 1 times [2024-09-20 19:56:23,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:23,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407315053] [2024-09-20 19:56:23,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:23,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:23,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752916382] [2024-09-20 19:56:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:23,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:23,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:23,503 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 19:56:23,505 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 19:56:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:23,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-20 19:56:23,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:23,638 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 19:56:23,653 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 19:56:23,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:23,718 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 19:56:23,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 19:56:23,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:56:23,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:56:23,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:23,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407315053] [2024-09-20 19:56:23,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:23,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752916382] [2024-09-20 19:56:23,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752916382] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:56:23,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:56:23,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:56:23,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670740942] [2024-09-20 19:56:23,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:23,763 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:56:23,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:23,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:56:23,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:56:23,764 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:56:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:23,967 INFO L93 Difference]: Finished difference Result 84 states and 99 transitions. [2024-09-20 19:56:23,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:56:23,968 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2024-09-20 19:56:23,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:23,973 INFO L225 Difference]: With dead ends: 84 [2024-09-20 19:56:23,973 INFO L226 Difference]: Without dead ends: 82 [2024-09-20 19:56:23,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:56:23,975 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:23,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 266 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:56:23,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-20 19:56:23,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2024-09-20 19:56:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 51 states have internal predecessors, (53), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-20 19:56:24,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2024-09-20 19:56:24,005 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 34 [2024-09-20 19:56:24,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:24,006 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2024-09-20 19:56:24,006 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-20 19:56:24,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:24,006 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2024-09-20 19:56:24,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 19:56:24,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:24,007 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:24,026 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 19:56:24,208 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 19:56:24,208 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:24,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:24,209 INFO L85 PathProgramCache]: Analyzing trace with hash -372589770, now seen corresponding path program 1 times [2024-09-20 19:56:24,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:24,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071006603] [2024-09-20 19:56:24,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:24,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210172731] [2024-09-20 19:56:24,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:24,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:24,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:24,290 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 19:56:24,292 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 19:56:24,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:24,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 19:56:24,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:24,407 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 19:56:24,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:24,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:56:24,479 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 19:56:24,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 19:56:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:56:24,507 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:56:24,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:24,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071006603] [2024-09-20 19:56:24,508 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:24,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210172731] [2024-09-20 19:56:24,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210172731] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:56:24,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:56:24,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 19:56:24,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691232334] [2024-09-20 19:56:24,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:24,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 19:56:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 19:56:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 19:56:24,510 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:56:24,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:24,743 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2024-09-20 19:56:24,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:56:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 34 [2024-09-20 19:56:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:24,745 INFO L225 Difference]: With dead ends: 88 [2024-09-20 19:56:24,746 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 19:56:24,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 19:56:24,747 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 28 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:24,748 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 72 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:56:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 19:56:24,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-20 19:56:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 50 states have internal predecessors, (52), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2024-09-20 19:56:24,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2024-09-20 19:56:24,765 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 34 [2024-09-20 19:56:24,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:24,765 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2024-09-20 19:56:24,765 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:56:24,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:24,766 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2024-09-20 19:56:24,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 19:56:24,767 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:24,767 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:24,787 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 19:56:24,971 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 19:56:24,972 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:24,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash 316523269, now seen corresponding path program 1 times [2024-09-20 19:56:24,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:24,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392773359] [2024-09-20 19:56:24,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:24,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:25,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [784261679] [2024-09-20 19:56:25,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:25,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:25,015 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 19:56:25,017 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 19:56:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:25,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 19:56:25,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:25,149 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 19:56:25,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:25,159 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 19:56:25,414 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 19:56:25,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 19:56:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:56:25,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:56:25,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392773359] [2024-09-20 19:56:25,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784261679] [2024-09-20 19:56:25,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784261679] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:56:25,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:56:25,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 11 [2024-09-20 19:56:25,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900035503] [2024-09-20 19:56:25,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:25,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 19:56:25,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:25,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 19:56:25,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-20 19:56:25,595 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:56:25,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:25,906 INFO L93 Difference]: Finished difference Result 111 states and 132 transitions. [2024-09-20 19:56:25,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:56:25,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-20 19:56:25,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:25,908 INFO L225 Difference]: With dead ends: 111 [2024-09-20 19:56:25,908 INFO L226 Difference]: Without dead ends: 109 [2024-09-20 19:56:25,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:56:25,909 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 24 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:25,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 298 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:56:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-20 19:56:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2024-09-20 19:56:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 70 states have internal predecessors, (72), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-20 19:56:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2024-09-20 19:56:25,931 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 40 [2024-09-20 19:56:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:25,931 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2024-09-20 19:56:25,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:56:25,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2024-09-20 19:56:25,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 19:56:25,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:25,933 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:25,951 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 19:56:26,137 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 19:56:26,138 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:26,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:26,139 INFO L85 PathProgramCache]: Analyzing trace with hash -889408325, now seen corresponding path program 1 times [2024-09-20 19:56:26,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:26,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421447449] [2024-09-20 19:56:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:26,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:26,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:56:27,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:56:27,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 19:56:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 19:56:27,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-20 19:56:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 19:56:27,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 19:56:27,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:27,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421447449] [2024-09-20 19:56:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421447449] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:56:27,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:56:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2024-09-20 19:56:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986425809] [2024-09-20 19:56:27,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:27,168 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 19:56:27,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 19:56:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2024-09-20 19:56:27,170 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:56:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:27,580 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2024-09-20 19:56:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:56:27,582 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 46 [2024-09-20 19:56:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:27,583 INFO L225 Difference]: With dead ends: 114 [2024-09-20 19:56:27,585 INFO L226 Difference]: Without dead ends: 112 [2024-09-20 19:56:27,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:56:27,586 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 31 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:27,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 387 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 19:56:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-20 19:56:27,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2024-09-20 19:56:27,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 28 states have call successors, (28), 15 states have call predecessors, (28), 14 states have return successors, (29), 25 states have call predecessors, (29), 26 states have call successors, (29) [2024-09-20 19:56:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2024-09-20 19:56:27,619 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 46 [2024-09-20 19:56:27,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:27,619 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2024-09-20 19:56:27,620 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 1.75) internal successors, (21), 13 states have internal predecessors, (21), 8 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-20 19:56:27,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:27,620 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2024-09-20 19:56:27,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 19:56:27,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:27,621 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:27,621 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-20 19:56:27,621 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:27,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:27,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1594102023, now seen corresponding path program 1 times [2024-09-20 19:56:27,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:27,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101612521] [2024-09-20 19:56:27,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:27,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:27,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [301144582] [2024-09-20 19:56:27,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:27,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:27,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:27,687 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 19:56:27,692 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 19:56:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:27,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 19:56:27,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:27,839 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 19:56:27,973 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 19:56:27,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:28,423 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 19:56:28,462 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 19:56:28,469 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 19:56:28,524 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:56:28,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:28,622 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 35 treesize of output 27 [2024-09-20 19:56:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:56:28,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:28,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101612521] [2024-09-20 19:56:28,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:28,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301144582] [2024-09-20 19:56:28,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301144582] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:56:28,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:56:28,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [17] total 22 [2024-09-20 19:56:28,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233043400] [2024-09-20 19:56:28,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:28,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 19:56:28,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:28,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 19:56:28,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-09-20 19:56:28,763 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:56:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:29,069 INFO L93 Difference]: Finished difference Result 128 states and 151 transitions. [2024-09-20 19:56:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:56:29,070 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2024-09-20 19:56:29,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:29,072 INFO L225 Difference]: With dead ends: 128 [2024-09-20 19:56:29,072 INFO L226 Difference]: Without dead ends: 126 [2024-09-20 19:56:29,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:56:29,073 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:29,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 264 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:56:29,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-09-20 19:56:29,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2024-09-20 19:56:29,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 78 states have internal predecessors, (80), 28 states have call successors, (28), 16 states have call predecessors, (28), 17 states have return successors, (31), 25 states have call predecessors, (31), 26 states have call successors, (31) [2024-09-20 19:56:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 139 transitions. [2024-09-20 19:56:29,119 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 139 transitions. Word has length 53 [2024-09-20 19:56:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:29,119 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 139 transitions. [2024-09-20 19:56:29,119 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 4 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-20 19:56:29,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:29,120 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 139 transitions. [2024-09-20 19:56:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 19:56:29,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:29,121 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:29,139 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:56:29,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:29,321 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:29,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -161335246, now seen corresponding path program 1 times [2024-09-20 19:56:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106640693] [2024-09-20 19:56:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:29,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2085742699] [2024-09-20 19:56:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:29,356 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 19:56:29,357 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 19:56:29,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:29,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-20 19:56:29,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:29,500 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 19:56:29,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:29,513 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 19:56:29,529 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 19:56:29,614 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 19:56:29,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 19:56:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:56:29,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:56:29,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:29,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106640693] [2024-09-20 19:56:29,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:29,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085742699] [2024-09-20 19:56:29,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085742699] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:56:29,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:56:29,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:56:29,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751418461] [2024-09-20 19:56:29,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:56:29,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:56:29,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:29,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:56:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:56:29,651 INFO L87 Difference]: Start difference. First operand 120 states and 139 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 19:56:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:29,987 INFO L93 Difference]: Finished difference Result 144 states and 172 transitions. [2024-09-20 19:56:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:56:29,987 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 59 [2024-09-20 19:56:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:29,989 INFO L225 Difference]: With dead ends: 144 [2024-09-20 19:56:29,989 INFO L226 Difference]: Without dead ends: 142 [2024-09-20 19:56:29,989 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:56:29,990 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 36 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:29,990 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 141 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 19:56:29,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-20 19:56:30,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2024-09-20 19:56:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 91 states have internal predecessors, (93), 33 states have call successors, (33), 18 states have call predecessors, (33), 20 states have return successors, (41), 31 states have call predecessors, (41), 31 states have call successors, (41) [2024-09-20 19:56:30,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-20 19:56:30,021 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 59 [2024-09-20 19:56:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:30,021 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-20 19:56:30,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 19:56:30,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-20 19:56:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-20 19:56:30,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:30,023 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:30,039 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 19:56:30,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:30,224 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:30,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1396822734, now seen corresponding path program 1 times [2024-09-20 19:56:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:30,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147747636] [2024-09-20 19:56:30,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:30,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758818747] [2024-09-20 19:56:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:30,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:30,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:30,259 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 19:56:30,261 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 19:56:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:56:30,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 93 conjuncts are in the unsatisfiable core [2024-09-20 19:56:30,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:30,419 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 19:56:30,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:56:30,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:30,658 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 29 treesize of output 17 [2024-09-20 19:56:30,665 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 19:56:30,713 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 21 treesize of output 13 [2024-09-20 19:56:30,715 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 19:56:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:56:30,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:30,915 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-20 19:56:30,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:30,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147747636] [2024-09-20 19:56:30,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:30,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758818747] [2024-09-20 19:56:30,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758818747] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:56:30,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 19:56:30,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2024-09-20 19:56:30,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405583155] [2024-09-20 19:56:30,917 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 19:56:30,917 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:56:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:30,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:56:30,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:56:30,918 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 19:56:31,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:56:31,562 INFO L93 Difference]: Finished difference Result 208 states and 250 transitions. [2024-09-20 19:56:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:56:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 62 [2024-09-20 19:56:31,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:56:31,566 INFO L225 Difference]: With dead ends: 208 [2024-09-20 19:56:31,566 INFO L226 Difference]: Without dead ends: 206 [2024-09-20 19:56:31,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 101 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-20 19:56:31,567 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 19:56:31,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 440 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 19:56:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-20 19:56:31,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 200. [2024-09-20 19:56:31,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 123 states have (on average 1.08130081300813) internal successors, (133), 130 states have internal predecessors, (133), 44 states have call successors, (44), 25 states have call predecessors, (44), 32 states have return successors, (64), 45 states have call predecessors, (64), 41 states have call successors, (64) [2024-09-20 19:56:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 241 transitions. [2024-09-20 19:56:31,637 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 241 transitions. Word has length 62 [2024-09-20 19:56:31,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:56:31,637 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 241 transitions. [2024-09-20 19:56:31,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 8 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 19:56:31,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:31,638 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 241 transitions. [2024-09-20 19:56:31,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-20 19:56:31,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:56:31,640 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:56:31,654 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 19:56:31,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:31,844 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:56:31,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:56:31,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1851795615, now seen corresponding path program 2 times [2024-09-20 19:56:31,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:56:31,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552174792] [2024-09-20 19:56:31,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:56:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:56:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:56:31,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [458926299] [2024-09-20 19:56:31,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:56:31,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:56:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:56:31,876 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:56:31,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:56:32,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:56:32,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:56:32,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-09-20 19:56:32,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:56:32,048 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 19:56:32,050 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 19:56:32,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:32,081 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 19:56:32,292 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 19:56:32,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:56:32,335 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 19:56:37,462 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 19:56:37,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-20 19:56:37,474 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 50 treesize of output 38 [2024-09-20 19:56:37,508 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 19:56:37,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 80 [2024-09-20 19:56:39,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:56:39,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 144 [2024-09-20 19:56:39,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:56:39,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 182 treesize of output 206 [2024-09-20 19:56:39,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:56:39,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 169 [2024-09-20 19:56:39,779 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 19:56:39,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:56:53,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:56:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552174792] [2024-09-20 19:56:53,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:56:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458926299] [2024-09-20 19:56:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458926299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:56:53,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:56:53,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 19:56:53,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779358080] [2024-09-20 19:56:53,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:56:53,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 19:56:53,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:56:53,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 19:56:53,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=881, Unknown=3, NotChecked=0, Total=992 [2024-09-20 19:56:53,094 INFO L87 Difference]: Start difference. First operand 200 states and 241 transitions. Second operand has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 19:57:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:57:04,996 INFO L93 Difference]: Finished difference Result 332 states and 381 transitions. [2024-09-20 19:57:04,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 19:57:04,997 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 65 [2024-09-20 19:57:04,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:57:05,000 INFO L225 Difference]: With dead ends: 332 [2024-09-20 19:57:05,000 INFO L226 Difference]: Without dead ends: 330 [2024-09-20 19:57:05,001 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 48 SyntacticMatches, 6 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=215, Invalid=1760, Unknown=5, NotChecked=0, Total=1980 [2024-09-20 19:57:05,001 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 59 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 19:57:05,002 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 421 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 19:57:05,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-09-20 19:57:05,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 325. [2024-09-20 19:57:05,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 206 states have (on average 1.0776699029126213) internal successors, (222), 216 states have internal predecessors, (222), 62 states have call successors, (62), 45 states have call predecessors, (62), 56 states have return successors, (91), 64 states have call predecessors, (91), 58 states have call successors, (91) [2024-09-20 19:57:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 375 transitions. [2024-09-20 19:57:05,119 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 375 transitions. Word has length 65 [2024-09-20 19:57:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:57:05,120 INFO L474 AbstractCegarLoop]: Abstraction has 325 states and 375 transitions. [2024-09-20 19:57:05,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.7) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (13), 8 states have call predecessors, (13), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 19:57:05,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 375 transitions. [2024-09-20 19:57:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-20 19:57:05,122 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:57:05,122 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:57:05,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:57:05,322 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 19:57:05,323 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:57:05,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:57:05,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1323270614, now seen corresponding path program 1 times [2024-09-20 19:57:05,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:57:05,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881721951] [2024-09-20 19:57:05,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:05,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:57:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:57:05,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471471823] [2024-09-20 19:57:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:57:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:57:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:57:05,358 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:57:05,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:57:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:57:05,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 163 conjuncts are in the unsatisfiable core [2024-09-20 19:57:05,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:57:05,529 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 19:57:05,532 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 19:57:05,563 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 15 treesize of output 11 [2024-09-20 19:57:05,571 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 19:57:05,594 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 19:57:05,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 19:57:05,940 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 19:57:05,996 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 19:57:35,817 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 19:57:35,833 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:57:35,833 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 38 treesize of output 38 [2024-09-20 19:58:02,114 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 50 treesize of output 38 [2024-09-20 19:58:02,834 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 19:58:02,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 73 [2024-09-20 19:58:03,012 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 19:58:07,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:58:07,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 103 [2024-09-20 19:58:07,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 19:58:07,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 143 treesize of output 279 [2024-09-20 19:58:07,779 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 97 treesize of output 69 [2024-09-20 19:58:08,111 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 34 proven. 22 refuted. 24 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-20 19:58:08,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:58:11,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 66 [2024-09-20 19:58:11,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 50 [2024-09-20 19:58:15,074 WARN L854 $PredicateComparison]: unable to prove that (and (or (< (select (select |c_#memory_int#6| |c_func_to_recursive_line_32_to_55_0_#in~x.base|) |c_func_to_recursive_line_32_to_55_0_#in~x.offset|) (+ (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_32_to_55_0_#in~r.base|) |c_func_to_recursive_line_32_to_55_0_#in~r.offset|) (* (select (select |c_#memory_int#5| |c_func_to_recursive_line_32_to_55_0_#in~y.base|) |c_func_to_recursive_line_32_to_55_0_#in~y.offset|) (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_32_to_55_0_#in~q.base|) |c_func_to_recursive_line_32_to_55_0_#in~q.offset|)) 1)) (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (= (+ (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|) (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|)) (select (select |c_#memory_int#1| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)) (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|)))) (forall ((|v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7| Int) (|v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7| Int)) (let ((.cse0 (select (select |c_#memory_int#5| |v_func_to_recursive_line_32_to_55_0_#in~y.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~y.offset_BEFORE_CALL_7|)) (.cse1 (select (select |c_#memory_int#6| |v_func_to_recursive_line_32_to_55_0_#in~x.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~x.offset_BEFORE_CALL_7|))) (or (= (+ (* .cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|)) (select (select |c_#memory_int#1| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)) .cse1) (not (= (+ (* (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_32_to_55_0_#in~q.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~q.offset_BEFORE_CALL_7|) .cse0) (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_32_to_55_0_#in~r.base_BEFORE_CALL_7|) |v_func_to_recursive_line_32_to_55_0_#in~r.offset_BEFORE_CALL_7|)) .cse1)))))) is different from false [2024-09-20 19:58:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:58:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881721951] [2024-09-20 19:58:15,424 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:58:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471471823] [2024-09-20 19:58:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471471823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:58:15,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:58:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-20 19:58:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177557773] [2024-09-20 19:58:15,424 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 19:58:15,425 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 19:58:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:58:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 19:58:15,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1118, Unknown=15, NotChecked=68, Total=1332 [2024-09-20 19:58:15,426 INFO L87 Difference]: Start difference. First operand 325 states and 375 transitions. Second operand has 30 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 10 states have call successors, (14), 7 states have call predecessors, (14), 8 states have return successors, (12), 9 states have call predecessors, (12), 9 states have call successors, (12) [2024-09-20 19:58:19,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:23,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:31,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:36,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:40,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:58:44,297 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 19:59:11,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:59:15,133 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:59:19,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 19:59:23,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 20:00:22,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:26,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:34,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-20 20:00:38,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0]