./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.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_hard2.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 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 --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 19:59:54,212 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:59:54,292 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:59:54,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:59:54,297 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:59:54,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:59:54,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:59:54,323 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:59:54,323 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:59:54,324 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:59:54,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:59:54,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:59:54,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:59:54,325 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:59:54,326 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:59:54,326 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:59:54,326 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:59:54,327 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:59:54,327 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:59:54,328 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:59:54,328 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:59:54,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:59:54,331 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:59:54,331 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:59:54,331 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:59:54,332 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:59:54,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:59:54,332 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:59:54,332 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:59:54,333 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:59:54,333 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:59:54,333 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:59:54,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:59:54,334 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:59:54,334 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:59:54,334 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:59:54,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:59:54,335 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:59:54,335 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:59:54,335 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:59:54,336 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:59:54,336 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:59:54,336 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8571897e57404ad6e85df2c29745d5b56fa4d168673d3bc7c670c79b03a6c106 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:59:54,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:59:54,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:59:54,606 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:59:54,608 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:59:54,608 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:59:54,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-20 19:59:56,117 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:59:56,283 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:59:56,284 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard2.c [2024-09-20 19:59:56,295 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/92d67b293/caba0ea1ba884d2ea21085b7f4514731/FLAGddd6a8677 [2024-09-20 19:59:56,312 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/92d67b293/caba0ea1ba884d2ea21085b7f4514731 [2024-09-20 19:59:56,315 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:59:56,316 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:59:56,317 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:59:56,318 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:59:56,324 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:59:56,324 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,325 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5628134d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56, skipping insertion in model container [2024-09-20 19:59:56,326 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,353 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:59:56,533 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_hard2.c[1067,1080] [2024-09-20 19:59:56,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:59:56,571 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:59:56,581 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_hard2.c[1067,1080] [2024-09-20 19:59:56,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:59:56,615 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:59:56,616 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56 WrapperNode [2024-09-20 19:59:56,616 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:59:56,617 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:59:56,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:59:56,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:59:56,625 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,633 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,640 INFO L138 Inliner]: procedures = 17, calls = 90, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:59:56,641 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:59:56,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:59:56,642 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:59:56,642 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:59:56,651 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,654 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,673 INFO L175 MemorySlicer]: Split 56 memory accesses to 8 slices as follows [2, 9, 8, 6, 8, 5, 6, 12]. 21 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 3, 0, 1, 2, 1, 2, 3]. [2024-09-20 19:59:56,674 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,683 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,685 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,689 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,692 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:59:56,693 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:59:56,693 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:59:56,693 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:59:56,694 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (1/1) ... [2024-09-20 19:59:56,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:59:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:56,728 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 19:59:56,731 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 19:59:56,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:59:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_40_to_50_0 [2024-09-20 19:59:56,783 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_40_to_50_0 [2024-09-20 19:59:56,783 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:59:56,784 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:59:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:59:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 19:59:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 19:59:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 19:59:56,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 19:59:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 19:59:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-20 19:59:56,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2024-09-20 19:59:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 19:59:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 19:59:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 19:59:56,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 19:59:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 19:59:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 19:59:56,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 19:59:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-20 19:59:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2024-09-20 19:59:56,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:59:56,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:59:56,789 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_30_to_37_0 [2024-09-20 19:59:56,789 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_30_to_37_0 [2024-09-20 19:59:56,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:59:56,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-20 19:59:56,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2024-09-20 19:59:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 19:59:56,791 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 19:59:56,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 19:59:56,935 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:59:56,938 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:59:57,231 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-20 19:59:57,231 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:59:57,256 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:59:57,258 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 19:59:57,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:59:57 BoogieIcfgContainer [2024-09-20 19:59:57,259 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:59:57,261 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:59:57,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:59:57,265 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:59:57,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:59:56" (1/3) ... [2024-09-20 19:59:57,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784a2662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:59:57, skipping insertion in model container [2024-09-20 19:59:57,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:59:56" (2/3) ... [2024-09-20 19:59:57,266 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@784a2662 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:59:57, skipping insertion in model container [2024-09-20 19:59:57,266 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:59:57" (3/3) ... [2024-09-20 19:59:57,267 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard2.c [2024-09-20 19:59:57,285 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:59:57,285 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:59:57,355 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:59:57,365 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;@35bb8097, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:59:57,365 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:59:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 19:59:57,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-09-20 19:59:57,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:57,379 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:57,379 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:57,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash -237389290, now seen corresponding path program 1 times [2024-09-20 19:59:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427284164] [2024-09-20 19:59:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:58,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:59:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:58,110 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 19:59:58,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:58,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427284164] [2024-09-20 19:59:58,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427284164] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:59:58,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:59:58,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:59:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332995923] [2024-09-20 19:59:58,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:59:58,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:59:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:58,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:59:58,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:59:58,145 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 27 states have internal predecessors, (31), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 19:59:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:58,378 INFO L93 Difference]: Finished difference Result 86 states and 122 transitions. [2024-09-20 19:59:58,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:59:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-09-20 19:59:58,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:58,391 INFO L225 Difference]: With dead ends: 86 [2024-09-20 19:59:58,391 INFO L226 Difference]: Without dead ends: 44 [2024-09-20 19:59:58,396 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 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 19:59:58,402 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 18 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:58,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 255 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:59:58,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-20 19:59:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-20 19:59:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 25 states have (on average 1.16) internal successors, (29), 28 states have internal predecessors, (29), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:59:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2024-09-20 19:59:58,451 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 12 [2024-09-20 19:59:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:58,452 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2024-09-20 19:59:58,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 19:59:58,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2024-09-20 19:59:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 19:59:58,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:58,457 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:58,457 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:59:58,457 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:58,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:58,458 INFO L85 PathProgramCache]: Analyzing trace with hash -603068878, now seen corresponding path program 1 times [2024-09-20 19:59:58,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:58,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165119261] [2024-09-20 19:59:58,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:58,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:58,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:59:58,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:58,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 19:59:58,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:58,819 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 19:59:58,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:58,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165119261] [2024-09-20 19:59:58,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165119261] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:59:58,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:59:58,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 19:59:58,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407307409] [2024-09-20 19:59:58,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:59:58,822 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:59:58,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:58,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:59:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 19:59:58,825 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:59:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:59:58,977 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2024-09-20 19:59:58,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:59:58,977 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-20 19:59:58,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:59:58,978 INFO L225 Difference]: With dead ends: 50 [2024-09-20 19:59:58,979 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 19:59:58,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 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 19:59:58,980 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:59:58,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 240 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:59:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 19:59:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 19:59:58,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 13 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 19:59:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2024-09-20 19:59:58,994 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 18 [2024-09-20 19:59:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:59:58,994 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2024-09-20 19:59:58,994 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), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:59:58,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:58,995 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2024-09-20 19:59:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 19:59:58,996 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:59:58,996 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:59:58,996 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 19:59:58,996 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:59:58,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:59:58,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1373219252, now seen corresponding path program 1 times [2024-09-20 19:59:58,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:59:58,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889732354] [2024-09-20 19:59:58,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:58,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:59:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 19:59:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1425734025] [2024-09-20 19:59:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:59:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:59:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:59:59,043 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 19:59:59,045 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 19:59:59,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:59:59,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 19:59:59,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:59:59,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:59,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:59,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 19:59:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 19:59:59,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:59:59,751 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 19:59:59,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:59:59,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889732354] [2024-09-20 19:59:59,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 19:59:59,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425734025] [2024-09-20 19:59:59,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425734025] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 19:59:59,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:59:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 13 [2024-09-20 19:59:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352136132] [2024-09-20 19:59:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:59:59,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 19:59:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:59:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 19:59:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:59:59,756 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 20:00:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:00,003 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2024-09-20 20:00:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:00:00,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 20:00:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:00,006 INFO L225 Difference]: With dead ends: 59 [2024-09-20 20:00:00,007 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 20:00:00,007 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 20:00:00,008 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:00,009 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 232 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:00:00,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 20:00:00,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2024-09-20 20:00:00,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 8 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-20 20:00:00,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2024-09-20 20:00:00,031 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 24 [2024-09-20 20:00:00,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:00,032 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2024-09-20 20:00:00,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 20:00:00,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:00,033 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2024-09-20 20:00:00,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 20:00:00,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:00,034 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] [2024-09-20 20:00:00,053 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 20:00:00,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:00,235 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:00,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash 257250778, now seen corresponding path program 1 times [2024-09-20 20:00:00,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:00,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686236032] [2024-09-20 20:00:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:00,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:00,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1690755144] [2024-09-20 20:00:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:00,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:00,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:00,284 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 20:00:00,286 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 20:00:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:00,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 20:00:00,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:00,429 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 20:00:00,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:00:00,444 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 20:00:00,742 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 20:00:00,746 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 20:00:00,781 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 20:00:00,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:00,905 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 20:00:00,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686236032] [2024-09-20 20:00:00,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:00,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690755144] [2024-09-20 20:00:00,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690755144] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:00,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:00,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-20 20:00:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971332285] [2024-09-20 20:00:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:00:00,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:00:00,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:00,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:00:00,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:00:00,908 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:00:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:01,085 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2024-09-20 20:00:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:00:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2024-09-20 20:00:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:01,088 INFO L225 Difference]: With dead ends: 72 [2024-09-20 20:00:01,088 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 20:00:01,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-20 20:00:01,089 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 19 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:01,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 264 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 20:00:01,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 20:00:01,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2024-09-20 20:00:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 16 states have call successors, (16), 10 states have call predecessors, (16), 10 states have return successors, (18), 14 states have call predecessors, (18), 14 states have call successors, (18) [2024-09-20 20:00:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 82 transitions. [2024-09-20 20:00:01,111 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 82 transitions. Word has length 36 [2024-09-20 20:00:01,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:01,112 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 82 transitions. [2024-09-20 20:00:01,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-20 20:00:01,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 82 transitions. [2024-09-20 20:00:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 20:00:01,113 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:01,114 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] [2024-09-20 20:00:01,132 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 20:00:01,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:01,318 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:01,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:01,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1949399703, now seen corresponding path program 1 times [2024-09-20 20:00:01,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:01,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696232437] [2024-09-20 20:00:01,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:01,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:01,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972478195] [2024-09-20 20:00:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:01,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:01,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:01,376 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 20:00:01,378 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 20:00:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:01,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-20 20:00:01,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:01,519 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 20:00:01,524 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 20:00:01,531 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 20:00:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 20:00:01,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:06,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:06,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696232437] [2024-09-20 20:00:06,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:06,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972478195] [2024-09-20 20:00:06,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972478195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:06,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:06,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2024-09-20 20:00:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044085637] [2024-09-20 20:00:06,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:06,143 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 20:00:06,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:06,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 20:00:06,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=197, Unknown=1, NotChecked=0, Total=240 [2024-09-20 20:00:06,144 INFO L87 Difference]: Start difference. First operand 69 states and 82 transitions. Second operand has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 20:00:06,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:06,696 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2024-09-20 20:00:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 20:00:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-09-20 20:00:06,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:06,698 INFO L225 Difference]: With dead ends: 126 [2024-09-20 20:00:06,698 INFO L226 Difference]: Without dead ends: 124 [2024-09-20 20:00:06,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=102, Invalid=359, Unknown=1, NotChecked=0, Total=462 [2024-09-20 20:00:06,699 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 80 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:06,700 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 20:00:06,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-20 20:00:06,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2024-09-20 20:00:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 24 states have call successors, (24), 18 states have call predecessors, (24), 20 states have return successors, (30), 22 states have call predecessors, (30), 21 states have call successors, (30) [2024-09-20 20:00:06,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 140 transitions. [2024-09-20 20:00:06,738 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 140 transitions. Word has length 42 [2024-09-20 20:00:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:06,738 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 140 transitions. [2024-09-20 20:00:06,739 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 5 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 20:00:06,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 140 transitions. [2024-09-20 20:00:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 20:00:06,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:06,741 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] [2024-09-20 20:00:06,759 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 20:00:06,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:06,942 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:06,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -605627993, now seen corresponding path program 1 times [2024-09-20 20:00:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:06,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212070550] [2024-09-20 20:00:06,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:06,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [161762414] [2024-09-20 20:00:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:06,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:06,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:06,977 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 20:00:06,979 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 20:00:07,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:07,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 20:00:07,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:07,123 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 20:00:07,127 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 20:00:07,267 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 20:00:07,324 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 20:00:07,328 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 20:00:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 20:00:07,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:07,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212070550] [2024-09-20 20:00:07,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:07,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161762414] [2024-09-20 20:00:07,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161762414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:07,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:07,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-20 20:00:07,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487198642] [2024-09-20 20:00:07,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:07,605 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:00:07,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:00:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:00:07,606 INFO L87 Difference]: Start difference. First operand 122 states and 140 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 20:00:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:07,970 INFO L93 Difference]: Finished difference Result 147 states and 169 transitions. [2024-09-20 20:00:07,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 20:00:07,971 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 52 [2024-09-20 20:00:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:07,972 INFO L225 Difference]: With dead ends: 147 [2024-09-20 20:00:07,973 INFO L226 Difference]: Without dead ends: 143 [2024-09-20 20:00:07,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-20 20:00:07,974 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:07,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 85 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 20:00:07,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-20 20:00:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2024-09-20 20:00:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.103448275862069) internal successors, (96), 91 states have internal predecessors, (96), 27 states have call successors, (27), 21 states have call predecessors, (27), 22 states have return successors, (33), 25 states have call predecessors, (33), 23 states have call successors, (33) [2024-09-20 20:00:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2024-09-20 20:00:08,066 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 52 [2024-09-20 20:00:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:08,068 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2024-09-20 20:00:08,069 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 20:00:08,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:08,069 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2024-09-20 20:00:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 20:00:08,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:08,072 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] [2024-09-20 20:00:08,091 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 20:00:08,272 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:08,273 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:08,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash -649217709, now seen corresponding path program 1 times [2024-09-20 20:00:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:08,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066815650] [2024-09-20 20:00:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:08,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:00:08,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:00:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:00:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:00:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:00:08,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-20 20:00:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 20:00:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:08,640 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 20:00:08,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:08,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066815650] [2024-09-20 20:00:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066815650] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:00:08,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:00:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 20:00:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128963924] [2024-09-20 20:00:08,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:00:08,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 20:00:08,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 20:00:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-20 20:00:08,643 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:00:08,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:08,886 INFO L93 Difference]: Finished difference Result 192 states and 222 transitions. [2024-09-20 20:00:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 20:00:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2024-09-20 20:00:08,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:08,892 INFO L225 Difference]: With dead ends: 192 [2024-09-20 20:00:08,893 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 20:00:08,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:00:08,894 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:08,896 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 104 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:00:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 20:00:08,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-20 20:00:08,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 90 states have internal predecessors, (94), 27 states have call successors, (27), 21 states have call predecessors, (27), 21 states have return successors, (29), 25 states have call predecessors, (29), 23 states have call successors, (29) [2024-09-20 20:00:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 150 transitions. [2024-09-20 20:00:08,953 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 150 transitions. Word has length 53 [2024-09-20 20:00:08,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:08,954 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 150 transitions. [2024-09-20 20:00:08,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 5 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-20 20:00:08,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:08,954 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 150 transitions. [2024-09-20 20:00:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 20:00:08,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:08,956 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1] [2024-09-20 20:00:08,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-20 20:00:08,956 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:08,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:08,957 INFO L85 PathProgramCache]: Analyzing trace with hash 217789429, now seen corresponding path program 1 times [2024-09-20 20:00:08,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:08,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109746292] [2024-09-20 20:00:08,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:08,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 20:00:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 20:00:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:00:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:00:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 20:00:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 20:00:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 20:00:09,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-20 20:00:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-20 20:00:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 20:00:09,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:09,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109746292] [2024-09-20 20:00:09,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109746292] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 20:00:09,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 20:00:09,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 20:00:09,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357969103] [2024-09-20 20:00:09,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 20:00:09,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 20:00:09,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:09,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 20:00:09,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-20 20:00:09,279 INFO L87 Difference]: Start difference. First operand 135 states and 150 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 20:00:09,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:09,538 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2024-09-20 20:00:09,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 20:00:09,539 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 58 [2024-09-20 20:00:09,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:09,541 INFO L225 Difference]: With dead ends: 141 [2024-09-20 20:00:09,541 INFO L226 Difference]: Without dead ends: 109 [2024-09-20 20:00:09,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-20 20:00:09,542 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 79 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 20:00:09,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 79 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 20:00:09,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-20 20:00:09,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2024-09-20 20:00:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 22 states have call successors, (22), 16 states have call predecessors, (22), 16 states have return successors, (24), 20 states have call predecessors, (24), 19 states have call successors, (24) [2024-09-20 20:00:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-09-20 20:00:09,567 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 58 [2024-09-20 20:00:09,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:09,567 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-09-20 20:00:09,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 20:00:09,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:09,568 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-09-20 20:00:09,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-20 20:00:09,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:09,569 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 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] [2024-09-20 20:00:09,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-20 20:00:09,569 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:09,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:09,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1027870564, now seen corresponding path program 1 times [2024-09-20 20:00:09,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:09,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276203746] [2024-09-20 20:00:09,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:09,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:09,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988213847] [2024-09-20 20:00:09,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:09,615 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 20:00:09,616 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 20:00:09,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 20:00:09,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-20 20:00:09,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:09,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 20:00:09,794 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 20:00:09,798 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 20:00:10,180 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 20:00:10,185 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 20:00:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-20 20:00:10,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:10,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276203746] [2024-09-20 20:00:10,813 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:10,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988213847] [2024-09-20 20:00:10,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988213847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:10,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:10,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-20 20:00:10,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314853158] [2024-09-20 20:00:10,813 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:10,814 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 20:00:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:10,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 20:00:10,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2024-09-20 20:00:10,815 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:00:11,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:11,626 INFO L93 Difference]: Finished difference Result 145 states and 164 transitions. [2024-09-20 20:00:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 20:00:11,627 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 66 [2024-09-20 20:00:11,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:11,629 INFO L225 Difference]: With dead ends: 145 [2024-09-20 20:00:11,629 INFO L226 Difference]: Without dead ends: 141 [2024-09-20 20:00:11,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2024-09-20 20:00:11,631 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 53 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:11,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 150 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 20:00:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-20 20:00:11,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 137. [2024-09-20 20:00:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 90 states have internal predecessors, (95), 27 states have call successors, (27), 21 states have call predecessors, (27), 22 states have return successors, (34), 26 states have call predecessors, (34), 23 states have call successors, (34) [2024-09-20 20:00:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2024-09-20 20:00:11,672 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 66 [2024-09-20 20:00:11,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:11,673 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2024-09-20 20:00:11,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 12 states have internal predecessors, (28), 8 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-20 20:00:11,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:11,674 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2024-09-20 20:00:11,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-20 20:00:11,675 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:11,675 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:11,691 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 20:00:11,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:11,876 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:11,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -409790049, now seen corresponding path program 2 times [2024-09-20 20:00:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:11,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031904642] [2024-09-20 20:00:11,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:11,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:11,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:11,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393922507] [2024-09-20 20:00:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 20:00:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:11,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:11,914 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 20:00:11,915 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 20:00:12,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 20:00:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:00:12,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 177 conjuncts are in the unsatisfiable core [2024-09-20 20:00:12,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:12,101 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 20:00:12,105 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 20:00:12,109 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 20:00:12,115 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 20:00:12,122 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 20:00:13,558 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 20:00:13,569 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 20:00:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 21 proven. 49 refuted. 33 times theorem prover too weak. 131 trivial. 0 not checked. [2024-09-20 20:00:34,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:00:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:00:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031904642] [2024-09-20 20:00:35,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:00:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393922507] [2024-09-20 20:00:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393922507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:00:35,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:00:35,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-20 20:00:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521177649] [2024-09-20 20:00:35,767 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:00:35,767 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 20:00:35,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:00:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 20:00:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=830, Unknown=4, NotChecked=0, Total=930 [2024-09-20 20:00:35,768 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 22 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:00:58,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:00:58,231 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2024-09-20 20:00:58,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 20:00:58,232 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 90 [2024-09-20 20:00:58,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:00:58,233 INFO L225 Difference]: With dead ends: 175 [2024-09-20 20:00:58,233 INFO L226 Difference]: Without dead ends: 171 [2024-09-20 20:00:58,234 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=262, Invalid=1985, Unknown=9, NotChecked=0, Total=2256 [2024-09-20 20:00:58,234 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 60 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 20:00:58,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 307 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 20:00:58,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-20 20:00:58,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2024-09-20 20:00:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 91 states have internal predecessors, (96), 27 states have call successors, (27), 21 states have call predecessors, (27), 23 states have return successors, (36), 27 states have call predecessors, (36), 23 states have call successors, (36) [2024-09-20 20:00:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 159 transitions. [2024-09-20 20:00:58,279 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 159 transitions. Word has length 90 [2024-09-20 20:00:58,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:00:58,280 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 159 transitions. [2024-09-20 20:00:58,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 11 states have call successors, (14), 6 states have call predecessors, (14), 7 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2024-09-20 20:00:58,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:58,281 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 159 transitions. [2024-09-20 20:00:58,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-09-20 20:00:58,285 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:00:58,285 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:00:58,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 20:00:58,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 20:00:58,486 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:00:58,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:00:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1410569242, now seen corresponding path program 3 times [2024-09-20 20:00:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:00:58,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938532077] [2024-09-20 20:00:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:00:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:00:58,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:00:58,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423780331] [2024-09-20 20:00:58,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 20:00:58,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:00:58,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:00:58,540 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 20:00:58,541 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 20:00:58,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 20:00:58,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:00:58,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 179 conjuncts are in the unsatisfiable core [2024-09-20 20:00:58,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:00:58,790 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 20:00:58,796 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 20:00:58,801 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 20:00:58,805 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 20:01:00,113 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 20:01:00,120 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 20:01:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 33 proven. 112 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-09-20 20:01:00,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:01:02,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:01:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938532077] [2024-09-20 20:01:02,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:01:02,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423780331] [2024-09-20 20:01:02,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423780331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:01:02,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:01:02,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-20 20:01:02,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119465282] [2024-09-20 20:01:02,178 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:01:02,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 20:01:02,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:01:02,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 20:01:02,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2024-09-20 20:01:02,179 INFO L87 Difference]: Start difference. First operand 139 states and 159 transitions. Second operand has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:01:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 20:01:03,965 INFO L93 Difference]: Finished difference Result 177 states and 199 transitions. [2024-09-20 20:01:03,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 20:01:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) Word has length 114 [2024-09-20 20:01:03,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 20:01:03,967 INFO L225 Difference]: With dead ends: 177 [2024-09-20 20:01:03,967 INFO L226 Difference]: Without dead ends: 173 [2024-09-20 20:01:03,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=216, Invalid=1424, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 20:01:03,969 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 20:01:03,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 308 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 20:01:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-20 20:01:04,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 141. [2024-09-20 20:01:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 92 states have internal predecessors, (97), 27 states have call successors, (27), 21 states have call predecessors, (27), 24 states have return successors, (38), 28 states have call predecessors, (38), 23 states have call successors, (38) [2024-09-20 20:01:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 162 transitions. [2024-09-20 20:01:04,030 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 162 transitions. Word has length 114 [2024-09-20 20:01:04,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 20:01:04,031 INFO L474 AbstractCegarLoop]: Abstraction has 141 states and 162 transitions. [2024-09-20 20:01:04,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (14), 6 states have call predecessors, (14), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-20 20:01:04,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:04,031 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 162 transitions. [2024-09-20 20:01:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-09-20 20:01:04,033 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 20:01:04,033 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 20:01:04,048 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 20:01:04,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:04,234 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 20:01:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 20:01:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1625386709, now seen corresponding path program 4 times [2024-09-20 20:01:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 20:01:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063005996] [2024-09-20 20:01:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 20:01:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 20:01:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 20:01:04,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1801812628] [2024-09-20 20:01:04,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 20:01:04,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 20:01:04,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 20:01:04,292 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 20:01:04,293 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 20:01:04,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 20:01:04,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 20:01:04,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 314 conjuncts are in the unsatisfiable core [2024-09-20 20:01:04,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 20:01:05,010 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 35 treesize of output 23 [2024-09-20 20:01:05,018 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 48 treesize of output 32 [2024-09-20 20:01:05,138 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 20:01:05,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 20:01:09,343 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (v_y_1 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4| Int)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4|) v_y_1) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10))) is different from true [2024-09-20 20:01:21,854 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((func_to_recursive_line_30_to_37_0_~A.base Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18| Int) (func_to_recursive_line_30_to_37_0_~A.offset Int)) (= (select (select |c_#memory_int#5| func_to_recursive_line_30_to_37_0_~A.base) func_to_recursive_line_30_to_37_0_~A.offset) (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14|))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (v_y_1 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4| Int)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4|) v_y_1) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10)))) is different from true [2024-09-20 20:01:38,396 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 13 [2024-09-20 20:01:38,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:01:58,613 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~A.base_64 Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_19| Int) (v_func_to_recursive_line_30_to_37_0_~A.offset_64 Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_19|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_15|) (select (select |c_#memory_int#5| v_func_to_recursive_line_30_to_37_0_~A.base_64) v_func_to_recursive_line_30_to_37_0_~A.offset_64))) (exists ((func_to_recursive_line_30_to_37_0_~A.base Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18| Int) (func_to_recursive_line_30_to_37_0_~A.offset Int)) (= (select (select |c_#memory_int#5| func_to_recursive_line_30_to_37_0_~A.base) func_to_recursive_line_30_to_37_0_~A.offset) (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14|))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (v_y_1 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4| Int)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4|) v_y_1) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10)))) is different from true [2024-09-20 20:02:06,848 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14| Int) (v_func_to_recursive_line_30_to_37_0_~A.base_65 Int) (v_func_to_recursive_line_30_to_37_0_~A.offset_65 Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_18|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_14|) (select (select |c_#memory_int#5| v_func_to_recursive_line_30_to_37_0_~A.base_65) v_func_to_recursive_line_30_to_37_0_~A.offset_65))) (exists ((|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_15| Int) (v_func_to_recursive_line_30_to_37_0_~A.base_64 Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_19| Int) (v_func_to_recursive_line_30_to_37_0_~A.offset_64 Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_19|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_15|) (select (select |c_#memory_int#5| v_func_to_recursive_line_30_to_37_0_~A.base_64) v_func_to_recursive_line_30_to_37_0_~A.offset_64))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (v_y_1 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4| Int)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4|) v_y_1) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10)))) is different from true [2024-09-20 20:02:19,077 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_23| Int) (|v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_19| Int) (func_to_recursive_line_30_to_37_0_~A.base Int) (func_to_recursive_line_30_to_37_0_~A.offset Int)) (= (select (select |c_#memory_int#5| func_to_recursive_line_30_to_37_0_~A.base) func_to_recursive_line_30_to_37_0_~A.offset) (select (select |c_#memory_int#4| |v_func_to_recursive_line_30_to_37_0_#in~r.base_BEFORE_CALL_23|) |v_func_to_recursive_line_30_to_37_0_#in~r.offset_BEFORE_CALL_19|))) (exists ((v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10 Int) (v_y_1 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4| Int) (v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13 Int) (|v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4| Int)) (<= (* (select (select |c_#memory_int#3| |v_func_to_recursive_line_30_to_37_0_#in~B.base_BEFORE_CALL_4|) |v_func_to_recursive_line_30_to_37_0_#in~B.offset_BEFORE_CALL_4|) v_y_1) (select (select |c_#memory_int#4| v_func_to_recursive_line_30_to_37_0_~r.base_BEFORE_CALL_13) v_func_to_recursive_line_30_to_37_0_~r.offset_BEFORE_CALL_10)))) is different from true [2024-09-20 20:02:27,402 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 13 [2024-09-20 20:02:27,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:02:48,241 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 13 [2024-09-20 20:02:48,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-20 20:02:53,662 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 84 treesize of output 60 [2024-09-20 20:02:53,693 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 58 treesize of output 42 [2024-09-20 20:02:55,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 20:02:55,793 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 90 treesize of output 134 [2024-09-20 20:02:55,893 INFO L349 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2024-09-20 20:02:55,894 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 152 treesize of output 160 [2024-09-20 20:02:57,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2024-09-20 20:02:57,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2024-09-20 20:02:57,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-20 20:03:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 204 proven. 84 refuted. 0 times theorem prover too weak. 107 trivial. 233 not checked. [2024-09-20 20:03:06,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 20:03:21,077 INFO L349 Elim1Store]: treesize reduction 10, result has 9.1 percent of original size [2024-09-20 20:03:21,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 20:04:02,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 20:04:02,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063005996] [2024-09-20 20:04:02,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 20:04:02,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801812628] [2024-09-20 20:04:02,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801812628] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 20:04:02,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 20:04:02,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2024-09-20 20:04:02,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035369034] [2024-09-20 20:04:02,327 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 20:04:02,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-20 20:04:02,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 20:04:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-20 20:04:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2125, Unknown=21, NotChecked=490, Total=2862 [2024-09-20 20:04:02,329 INFO L87 Difference]: Start difference. First operand 141 states and 162 transitions. Second operand has 46 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 35 states have internal predecessors, (59), 16 states have call successors, (21), 11 states have call predecessors, (21), 12 states have return successors, (18), 15 states have call predecessors, (18), 14 states have call successors, (18) [2024-09-20 20:04:06,349 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 20:04:10,359 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]