./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:37:22,521 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:37:22,570 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:37:22,576 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:37:22,577 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:37:22,608 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:37:22,608 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:37:22,609 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:37:22,609 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:37:22,609 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:37:22,610 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:37:22,610 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:37:22,610 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:37:22,612 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:37:22,612 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:37:22,613 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:37:22,613 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:37:22,613 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:37:22,613 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:37:22,613 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:37:22,614 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:37:22,616 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:37:22,616 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:37:22,617 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:37:22,617 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:37:22,617 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:37:22,617 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:37:22,617 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:37:22,618 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:37:22,618 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:37:22,618 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:37:22,618 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:37:22,618 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:37:22,619 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:37:22,619 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:37:22,620 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:37:22,621 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:37:22,621 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfbeed813c4c61f00fa3f37e016718a299be7911d54e721c8910a31480a25397 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:37:22,832 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:37:22,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:37:22,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:37:22,854 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:37:22,854 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:37:22,855 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-11 20:37:23,996 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:37:24,175 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:37:24,175 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c [2024-09-11 20:37:24,182 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6154ae803/470090de6f364679b5efb4690ddbb0e5/FLAG48d20ea86 [2024-09-11 20:37:24,588 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6154ae803/470090de6f364679b5efb4690ddbb0e5 [2024-09-11 20:37:24,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:37:24,591 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:37:24,592 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:37:24,592 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:37:24,598 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:37:24,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4929985a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24, skipping insertion in model container [2024-09-11 20:37:24,600 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,624 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:37:24,738 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-11 20:37:24,753 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:37:24,760 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:37:24,768 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_hard-ll.c[1083,1096] [2024-09-11 20:37:24,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:37:24,792 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:37:24,795 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24 WrapperNode [2024-09-11 20:37:24,795 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:37:24,796 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:37:24,796 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:37:24,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:37:24,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,808 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,821 INFO L138 Inliner]: procedures = 17, calls = 84, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2024-09-11 20:37:24,823 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:37:24,824 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:37:24,824 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:37:24,824 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:37:24,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,833 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,845 INFO L175 MemorySlicer]: Split 49 memory accesses to 7 slices as follows [2, 8, 7, 6, 5, 9, 12]. 24 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0, 0]. The 12 writes are split as follows [0, 2, 1, 2, 1, 3, 3]. [2024-09-11 20:37:24,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,852 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,853 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,854 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,856 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:37:24,857 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:37:24,857 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:37:24,857 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:37:24,858 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (1/1) ... [2024-09-11 20:37:24,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:37:24,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:24,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-11 20:37:24,885 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-11 20:37:24,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:37:24,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:37:24,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:37:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:37:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:37:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:37:24,918 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:37:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2024-09-11 20:37:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_41_to_51_0 [2024-09-11 20:37:24,919 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_41_to_51_0 [2024-09-11 20:37:24,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_38_0 [2024-09-11 20:37:24,920 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_38_0 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:37:24,920 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:37:24,920 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:37:24,921 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:37:24,921 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:37:25,020 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:37:25,022 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:37:25,254 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-09-11 20:37:25,254 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:37:25,287 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:37:25,288 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:37:25,288 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:37:25 BoogieIcfgContainer [2024-09-11 20:37:25,288 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:37:25,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:37:25,291 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:37:25,293 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:37:25,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:37:24" (1/3) ... [2024-09-11 20:37:25,294 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d09cc54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:37:25, skipping insertion in model container [2024-09-11 20:37:25,294 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:37:24" (2/3) ... [2024-09-11 20:37:25,295 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d09cc54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:37:25, skipping insertion in model container [2024-09-11 20:37:25,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:37:25" (3/3) ... [2024-09-11 20:37:25,296 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_hard-ll.c [2024-09-11 20:37:25,307 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:37:25,307 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:37:25,342 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:37:25,347 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;@5914f65a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:37:25,347 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:37:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-11 20:37:25,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-11 20:37:25,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:25,355 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:25,356 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:25,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:25,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1915466635, now seen corresponding path program 1 times [2024-09-11 20:37:25,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:25,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174417776] [2024-09-11 20:37:25,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:25,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:37:25,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:25,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174417776] [2024-09-11 20:37:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174417776] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:37:25,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:37:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:37:25,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148825168] [2024-09-11 20:37:25,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:25,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:25,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:25,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:37:25,826 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:37:26,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:26,005 INFO L93 Difference]: Finished difference Result 82 states and 120 transitions. [2024-09-11 20:37:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:37:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-11 20:37:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:26,013 INFO L225 Difference]: With dead ends: 82 [2024-09-11 20:37:26,013 INFO L226 Difference]: Without dead ends: 42 [2024-09-11 20:37:26,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:37:26,022 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 18 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 227 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 [2024-09-11 20:37:26,026 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 227 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:37:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-11 20:37:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-11 20:37:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:37:26,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2024-09-11 20:37:26,067 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 10 [2024-09-11 20:37:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:26,067 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2024-09-11 20:37:26,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-11 20:37:26,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:26,068 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2024-09-11 20:37:26,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-11 20:37:26,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:26,069 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:26,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:37:26,069 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:26,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:26,070 INFO L85 PathProgramCache]: Analyzing trace with hash 880062118, now seen corresponding path program 1 times [2024-09-11 20:37:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480714976] [2024-09-11 20:37:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:26,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-11 20:37:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:37:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480714976] [2024-09-11 20:37:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480714976] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:37:26,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:37:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:37:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9831686] [2024-09-11 20:37:26,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:26,561 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:26,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:37:26,564 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:37:26,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:26,751 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2024-09-11 20:37:26,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:37:26,752 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-11 20:37:26,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:26,753 INFO L225 Difference]: With dead ends: 48 [2024-09-11 20:37:26,753 INFO L226 Difference]: Without dead ends: 46 [2024-09-11 20:37:26,754 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 [2024-09-11 20:37:26,755 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 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 [2024-09-11 20:37:26,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:37:26,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-11 20:37:26,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-11 20:37:26,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:37:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2024-09-11 20:37:26,778 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 16 [2024-09-11 20:37:26,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:26,778 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2024-09-11 20:37:26,778 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), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:37:26,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:26,778 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2024-09-11 20:37:26,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-11 20:37:26,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:26,779 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:26,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-11 20:37:26,779 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:26,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1956934271, now seen corresponding path program 1 times [2024-09-11 20:37:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:26,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047338865] [2024-09-11 20:37:26,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:26,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:26,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835151047] [2024-09-11 20:37:26,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:26,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:26,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:26,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:26,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:37:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:26,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 20:37:26,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:27,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:27,085 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 17 treesize of output 13 [2024-09-11 20:37:27,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:27,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:37:27,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-11 20:37:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:37:27,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:27,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:37:27,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:27,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047338865] [2024-09-11 20:37:27,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:27,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835151047] [2024-09-11 20:37:27,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835151047] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:27,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:27,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 15 [2024-09-11 20:37:27,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751738499] [2024-09-11 20:37:27,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:27,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:27,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:27,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:27,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:37:27,594 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:37:27,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:27,860 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2024-09-11 20:37:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:37:27,860 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-09-11 20:37:27,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:27,863 INFO L225 Difference]: With dead ends: 57 [2024-09-11 20:37:27,863 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:37:27,863 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:37:27,864 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 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 [2024-09-11 20:37:27,864 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:37:27,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:37:27,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2024-09-11 20:37:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:37:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2024-09-11 20:37:27,881 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 22 [2024-09-11 20:37:27,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:27,881 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2024-09-11 20:37:27,882 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:37:27,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:27,882 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2024-09-11 20:37:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-11 20:37:27,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:27,884 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] [2024-09-11 20:37:27,897 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:37:28,087 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 [2024-09-11 20:37:28,088 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:28,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:28,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1106443508, now seen corresponding path program 1 times [2024-09-11 20:37:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902298100] [2024-09-11 20:37:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:28,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953901957] [2024-09-11 20:37:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:28,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:28,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:28,119 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:28,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:37:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:28,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-11 20:37:28,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:28,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:28,219 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 17 treesize of output 13 [2024-09-11 20:37:28,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:28,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:37:28,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:37:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:37:28,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:28,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:37:28,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902298100] [2024-09-11 20:37:28,592 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:28,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953901957] [2024-09-11 20:37:28,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953901957] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:28,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:28,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 9 [2024-09-11 20:37:28,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145411703] [2024-09-11 20:37:28,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:28,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:28,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:28,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:28,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:37:28,594 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:37:28,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:28,766 INFO L93 Difference]: Finished difference Result 70 states and 83 transitions. [2024-09-11 20:37:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:37:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-11 20:37:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:28,768 INFO L225 Difference]: With dead ends: 70 [2024-09-11 20:37:28,768 INFO L226 Difference]: Without dead ends: 68 [2024-09-11 20:37:28,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:37:28,769 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 244 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 [2024-09-11 20:37:28,769 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 244 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:37:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-11 20:37:28,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2024-09-11 20:37:28,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 47 states have internal predecessors, (49), 14 states have call successors, (14), 8 states have call predecessors, (14), 9 states have return successors, (17), 13 states have call predecessors, (17), 13 states have call successors, (17) [2024-09-11 20:37:28,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2024-09-11 20:37:28,792 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 34 [2024-09-11 20:37:28,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:28,792 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2024-09-11 20:37:28,792 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:37:28,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:28,793 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2024-09-11 20:37:28,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-11 20:37:28,795 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:28,795 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] [2024-09-11 20:37:28,808 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:37:28,995 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 [2024-09-11 20:37:28,996 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:28,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:28,996 INFO L85 PathProgramCache]: Analyzing trace with hash -60903716, now seen corresponding path program 1 times [2024-09-11 20:37:28,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:28,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946361194] [2024-09-11 20:37:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:28,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:29,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684877769] [2024-09-11 20:37:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:29,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:29,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:29,056 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:29,058 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:37:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:29,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-11 20:37:29,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:29,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:29,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:29,185 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 17 treesize of output 13 [2024-09-11 20:37:29,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:37:29,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:37:29,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-11 20:37:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:37:29,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:29,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:29,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946361194] [2024-09-11 20:37:29,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:29,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684877769] [2024-09-11 20:37:29,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684877769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:29,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:29,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-11 20:37:29,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818133128] [2024-09-11 20:37:29,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:29,579 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:37:29,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:29,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:37:29,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:37:29,579 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 20:37:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:30,018 INFO L93 Difference]: Finished difference Result 124 states and 141 transitions. [2024-09-11 20:37:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:37:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2024-09-11 20:37:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:30,020 INFO L225 Difference]: With dead ends: 124 [2024-09-11 20:37:30,020 INFO L226 Difference]: Without dead ends: 122 [2024-09-11 20:37:30,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:37:30,021 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:30,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 135 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:37:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-11 20:37:30,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-09-11 20:37:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 78 states have (on average 1.1153846153846154) internal successors, (87), 82 states have internal predecessors, (87), 22 states have call successors, (22), 16 states have call predecessors, (22), 19 states have return successors, (29), 21 states have call predecessors, (29), 20 states have call successors, (29) [2024-09-11 20:37:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2024-09-11 20:37:30,066 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 40 [2024-09-11 20:37:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:30,066 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2024-09-11 20:37:30,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-11 20:37:30,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:30,067 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2024-09-11 20:37:30,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-11 20:37:30,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:30,068 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] [2024-09-11 20:37:30,081 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:30,271 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 [2024-09-11 20:37:30,271 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:30,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:30,272 INFO L85 PathProgramCache]: Analyzing trace with hash -556833084, now seen corresponding path program 1 times [2024-09-11 20:37:30,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:30,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287718863] [2024-09-11 20:37:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:30,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:30,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989216289] [2024-09-11 20:37:30,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:30,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:30,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:30,306 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:30,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:37:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:30,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-11 20:37:30,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:30,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:30,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-11 20:37:30,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:30,437 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 [2024-09-11 20:37:30,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:30,969 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:30,969 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 40 treesize of output 40 [2024-09-11 20:37:30,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:37:31,169 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:31,169 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 47 treesize of output 43 [2024-09-11 20:37:31,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:31,179 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 56 treesize of output 48 [2024-09-11 20:37:31,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-11 20:37:31,250 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 20:37:31,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:35,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287718863] [2024-09-11 20:37:35,494 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:35,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989216289] [2024-09-11 20:37:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989216289] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:35,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 20:37:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615003239] [2024-09-11 20:37:35,494 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:35,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:37:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:35,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:37:35,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=358, Unknown=1, NotChecked=0, Total=420 [2024-09-11 20:37:35,496 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:37:39,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:43,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:48,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:52,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:56,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:37:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:56,839 INFO L93 Difference]: Finished difference Result 190 states and 217 transitions. [2024-09-11 20:37:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:37:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 50 [2024-09-11 20:37:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:56,845 INFO L225 Difference]: With dead ends: 190 [2024-09-11 20:37:56,845 INFO L226 Difference]: Without dead ends: 186 [2024-09-11 20:37:56,846 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=181, Invalid=1008, Unknown=1, NotChecked=0, Total=1190 [2024-09-11 20:37:56,846 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 100 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 63 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:56,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 155 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 557 Invalid, 5 Unknown, 0 Unchecked, 20.8s Time] [2024-09-11 20:37:56,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2024-09-11 20:37:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 174. [2024-09-11 20:37:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 113 states have (on average 1.1327433628318584) internal successors, (128), 118 states have internal predecessors, (128), 34 states have call successors, (34), 23 states have call predecessors, (34), 26 states have return successors, (39), 33 states have call predecessors, (39), 29 states have call successors, (39) [2024-09-11 20:37:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 201 transitions. [2024-09-11 20:37:56,894 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 201 transitions. Word has length 50 [2024-09-11 20:37:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:56,894 INFO L474 AbstractCegarLoop]: Abstraction has 174 states and 201 transitions. [2024-09-11 20:37:56,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 7 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:37:56,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 201 transitions. [2024-09-11 20:37:56,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-11 20:37:56,899 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:56,900 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] [2024-09-11 20:37:56,915 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:57,100 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 [2024-09-11 20:37:57,100 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:57,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:57,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1068410477, now seen corresponding path program 1 times [2024-09-11 20:37:57,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:57,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443792466] [2024-09-11 20:37:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:57,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:37:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:37:57,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-11 20:37:57,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-11 20:37:57,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:37:57,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:57,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443792466] [2024-09-11 20:37:57,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443792466] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:37:57,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:37:57,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:37:57,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385825167] [2024-09-11 20:37:57,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:57,351 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:57,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:57,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:57,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:37:57,352 INFO L87 Difference]: Start difference. First operand 174 states and 201 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 20:37:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:57,535 INFO L93 Difference]: Finished difference Result 178 states and 205 transitions. [2024-09-11 20:37:57,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:37:57,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2024-09-11 20:37:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:57,537 INFO L225 Difference]: With dead ends: 178 [2024-09-11 20:37:57,537 INFO L226 Difference]: Without dead ends: 130 [2024-09-11 20:37:57,537 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:37:57,538 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:57,538 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 98 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:37:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-11 20:37:57,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2024-09-11 20:37:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 87 states have internal predecessors, (92), 24 states have call successors, (24), 18 states have call predecessors, (24), 19 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2024-09-11 20:37:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 142 transitions. [2024-09-11 20:37:57,581 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 142 transitions. Word has length 51 [2024-09-11 20:37:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:57,581 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 142 transitions. [2024-09-11 20:37:57,581 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-11 20:37:57,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 142 transitions. [2024-09-11 20:37:57,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:37:57,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:57,585 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] [2024-09-11 20:37:57,585 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-11 20:37:57,585 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:57,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash 865304867, now seen corresponding path program 1 times [2024-09-11 20:37:57,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:57,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391823982] [2024-09-11 20:37:57,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:37:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:37:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:37:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:37:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-11 20:37:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-11 20:37:58,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:58,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391823982] [2024-09-11 20:37:58,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391823982] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:37:58,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:37:58,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2024-09-11 20:37:58,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410111061] [2024-09-11 20:37:58,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:58,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 20:37:58,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:58,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 20:37:58,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:37:58,224 INFO L87 Difference]: Start difference. First operand 128 states and 142 transitions. Second operand has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 20:37:58,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:58,669 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2024-09-11 20:37:58,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:37:58,670 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2024-09-11 20:37:58,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:58,671 INFO L225 Difference]: With dead ends: 132 [2024-09-11 20:37:58,671 INFO L226 Difference]: Without dead ends: 100 [2024-09-11 20:37:58,671 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:37:58,672 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:58,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 101 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:37:58,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-11 20:37:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2024-09-11 20:37:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 64 states have (on average 1.109375) internal successors, (71), 67 states have internal predecessors, (71), 19 states have call successors, (19), 13 states have call predecessors, (19), 14 states have return successors, (21), 18 states have call predecessors, (21), 17 states have call successors, (21) [2024-09-11 20:37:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2024-09-11 20:37:58,701 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 56 [2024-09-11 20:37:58,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:58,701 INFO L474 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2024-09-11 20:37:58,701 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 5 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-11 20:37:58,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2024-09-11 20:37:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-11 20:37:58,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:58,702 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] [2024-09-11 20:37:58,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-11 20:37:58,703 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:58,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:58,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1602970988, now seen corresponding path program 1 times [2024-09-11 20:37:58,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:58,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181077717] [2024-09-11 20:37:58,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:58,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:58,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:58,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134590870] [2024-09-11 20:37:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:58,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:58,774 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:37:58,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:37:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:58,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-11 20:37:58,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:58,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:58,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:58,949 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 17 treesize of output 13 [2024-09-11 20:37:58,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:37:59,131 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 31 treesize of output 19 [2024-09-11 20:37:59,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:59,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:37:59,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:37:59,330 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-11 20:37:59,330 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:59,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181077717] [2024-09-11 20:37:59,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:59,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134590870] [2024-09-11 20:37:59,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134590870] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:59,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:59,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-11 20:37:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281843989] [2024-09-11 20:37:59,772 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:59,772 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:37:59,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:37:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:37:59,773 INFO L87 Difference]: Start difference. First operand 98 states and 111 transitions. Second operand has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-11 20:38:00,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:00,401 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2024-09-11 20:38:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:38:00,402 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 64 [2024-09-11 20:38:00,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:00,403 INFO L225 Difference]: With dead ends: 132 [2024-09-11 20:38:00,403 INFO L226 Difference]: Without dead ends: 130 [2024-09-11 20:38:00,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:38:00,404 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:00,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 150 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:38:00,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-11 20:38:00,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2024-09-11 20:38:00,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 83 states have (on average 1.108433734939759) internal successors, (92), 86 states have internal predecessors, (92), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (31), 24 states have call predecessors, (31), 21 states have call successors, (31) [2024-09-11 20:38:00,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 147 transitions. [2024-09-11 20:38:00,436 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 147 transitions. Word has length 64 [2024-09-11 20:38:00,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:00,436 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 147 transitions. [2024-09-11 20:38:00,436 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2024-09-11 20:38:00,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 147 transitions. [2024-09-11 20:38:00,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-11 20:38:00,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:00,438 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] [2024-09-11 20:38:00,451 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:00,638 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 [2024-09-11 20:38:00,638 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:00,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:00,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1614407348, now seen corresponding path program 2 times [2024-09-11 20:38:00,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:00,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111753647] [2024-09-11 20:38:00,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:00,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:00,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896391356] [2024-09-11 20:38:00,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:38:00,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:00,689 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:00,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:38:00,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:38:00,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:00,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 137 conjuncts are in the unsatisfiable core [2024-09-11 20:38:00,823 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:00,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:00,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:00,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:00,836 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 17 treesize of output 13 [2024-09-11 20:38:00,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:38:01,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:01,545 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 31 treesize of output 19 [2024-09-11 20:38:01,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:38:01,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 18 proven. 85 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2024-09-11 20:38:01,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:03,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111753647] [2024-09-11 20:38:03,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896391356] [2024-09-11 20:38:03,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896391356] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:03,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:03,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:38:03,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017890072] [2024-09-11 20:38:03,516 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:03,517 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:38:03,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:03,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:38:03,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:38:03,517 INFO L87 Difference]: Start difference. First operand 128 states and 147 transitions. Second operand has 22 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:38:05,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:05,064 INFO L93 Difference]: Finished difference Result 162 states and 184 transitions. [2024-09-11 20:38:05,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:38:05,064 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) Word has length 88 [2024-09-11 20:38:05,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:05,066 INFO L225 Difference]: With dead ends: 162 [2024-09-11 20:38:05,066 INFO L226 Difference]: Without dead ends: 160 [2024-09-11 20:38:05,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=262, Invalid=1994, Unknown=0, NotChecked=0, Total=2256 [2024-09-11 20:38:05,067 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 61 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:05,067 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 292 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:38:05,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-11 20:38:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 130. [2024-09-11 20:38:05,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 87 states have internal predecessors, (93), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (33), 25 states have call predecessors, (33), 21 states have call successors, (33) [2024-09-11 20:38:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2024-09-11 20:38:05,099 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 88 [2024-09-11 20:38:05,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:05,099 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2024-09-11 20:38:05,099 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 2.125) internal successors, (34), 18 states have internal predecessors, (34), 9 states have call successors, (12), 5 states have call predecessors, (12), 6 states have return successors, (10), 6 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:38:05,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:05,099 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2024-09-11 20:38:05,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-11 20:38:05,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:05,101 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] [2024-09-11 20:38:05,115 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 20:38:05,301 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 [2024-09-11 20:38:05,302 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:05,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:05,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1792578812, now seen corresponding path program 3 times [2024-09-11 20:38:05,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:05,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193383928] [2024-09-11 20:38:05,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:05,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:05,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1835706056] [2024-09-11 20:38:05,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:38:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:05,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:05,355 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:05,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:38:05,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:38:05,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:05,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-09-11 20:38:05,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:05,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:05,700 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 17 treesize of output 13 [2024-09-11 20:38:05,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:05,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:38:06,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:06,281 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 31 treesize of output 19 [2024-09-11 20:38:06,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:38:06,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 101 proven. 44 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2024-09-11 20:38:06,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:07,936 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 20 treesize of output 16 [2024-09-11 20:38:07,941 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 16 treesize of output 12 [2024-09-11 20:38:21,220 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_28| Int) (|v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_16| Int)) (let ((.cse2 (mod (select (select |c_#memory_int#2| |v_func_to_recursive_line_31_to_38_0_#in~B.base_BEFORE_CALL_16|) |v_func_to_recursive_line_31_to_38_0_#in~B.offset_BEFORE_CALL_16|) 4294967296))) (or (not (= (select (select (store |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~d.base| (let ((.cse0 (select |c_old(#memory_int#6)| |c_func_to_recursive_line_31_to_38_0_#in~d.base|))) (store .cse0 |c_func_to_recursive_line_31_to_38_0_#in~d.offset| (* (select .cse0 |c_func_to_recursive_line_31_to_38_0_#in~d.offset|) 4)))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_28|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_28|) (* (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_38_0_#in~p.base| (let ((.cse1 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_38_0_#in~p.base|))) (store .cse1 |c_func_to_recursive_line_31_to_38_0_#in~p.offset| (* (select .cse1 |c_func_to_recursive_line_31_to_38_0_#in~p.offset|) 4)))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25|) .cse2))) (= (* (select (select (store |c_#memory_int#5| c_func_to_recursive_line_31_to_38_0_~p.base (let ((.cse3 (select |c_#memory_int#5| c_func_to_recursive_line_31_to_38_0_~p.base))) (store .cse3 c_func_to_recursive_line_31_to_38_0_~p.offset (* (select .cse3 c_func_to_recursive_line_31_to_38_0_~p.offset) 2)))) |v_func_to_recursive_line_31_to_38_0_#in~p.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_38_0_#in~p.offset_BEFORE_CALL_25|) .cse2) (select (select (store |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~d.base (let ((.cse4 (select |c_#memory_int#6| c_func_to_recursive_line_31_to_38_0_~d.base))) (store .cse4 c_func_to_recursive_line_31_to_38_0_~d.offset (* 2 (select .cse4 c_func_to_recursive_line_31_to_38_0_~d.offset))))) |v_func_to_recursive_line_31_to_38_0_#in~d.base_BEFORE_CALL_28|) |v_func_to_recursive_line_31_to_38_0_#in~d.offset_BEFORE_CALL_28|))))) is different from false [2024-09-11 20:38:21,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193383928] [2024-09-11 20:38:21,227 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835706056] [2024-09-11 20:38:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835706056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:21,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:21,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:38:21,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362383719] [2024-09-11 20:38:21,229 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:21,230 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:38:21,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:21,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:38:21,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=781, Unknown=2, NotChecked=56, Total=930 [2024-09-11 20:38:21,231 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand has 22 states, 16 states have (on average 2.1875) internal successors, (35), 19 states have internal predecessors, (35), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:38:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:22,605 INFO L93 Difference]: Finished difference Result 162 states and 186 transitions. [2024-09-11 20:38:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:38:22,606 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 2.1875) internal successors, (35), 19 states have internal predecessors, (35), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) Word has length 112 [2024-09-11 20:38:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:22,607 INFO L225 Difference]: With dead ends: 162 [2024-09-11 20:38:22,607 INFO L226 Difference]: Without dead ends: 160 [2024-09-11 20:38:22,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=189, Invalid=1453, Unknown=2, NotChecked=78, Total=1722 [2024-09-11 20:38:22,608 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:22,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 364 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 20:38:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-11 20:38:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2024-09-11 20:38:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 88 states have internal predecessors, (94), 24 states have call successors, (24), 17 states have call predecessors, (24), 22 states have return successors, (35), 26 states have call predecessors, (35), 21 states have call successors, (35) [2024-09-11 20:38:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 153 transitions. [2024-09-11 20:38:22,646 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 153 transitions. Word has length 112 [2024-09-11 20:38:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:22,646 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 153 transitions. [2024-09-11 20:38:22,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 2.1875) internal successors, (35), 19 states have internal predecessors, (35), 9 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:38:22,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 153 transitions. [2024-09-11 20:38:22,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-11 20:38:22,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:22,649 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] [2024-09-11 20:38:22,657 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:38:22,849 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 [2024-09-11 20:38:22,849 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:22,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:22,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2141401156, now seen corresponding path program 4 times [2024-09-11 20:38:22,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:22,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563664621] [2024-09-11 20:38:22,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:22,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:22,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222229501] [2024-09-11 20:38:22,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:38:22,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:22,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:22,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:22,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:38:23,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:38:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:23,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 720 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-09-11 20:38:23,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:23,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:23,239 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 [2024-09-11 20:38:23,248 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 17 treesize of output 13 [2024-09-11 20:38:23,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:38:23,500 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 [2024-09-11 20:38:24,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:24,313 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 42 treesize of output 26 [2024-09-11 20:38:24,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:38:24,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-09-11 20:38:24,620 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 30 treesize of output 18 [2024-09-11 20:38:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 86 proven. 108 refuted. 0 times theorem prover too weak. 434 trivial. 0 not checked. [2024-09-11 20:38:24,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:26,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:38:27,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563664621] [2024-09-11 20:38:27,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:27,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222229501] [2024-09-11 20:38:27,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222229501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:27,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:27,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:38:27,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323891365] [2024-09-11 20:38:27,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:27,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:38:27,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:27,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:38:27,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:38:27,343 INFO L87 Difference]: Start difference. First operand 132 states and 153 transitions. Second operand has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 9 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-11 20:38:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:29,396 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2024-09-11 20:38:29,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:38:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 9 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 136 [2024-09-11 20:38:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:29,397 INFO L225 Difference]: With dead ends: 164 [2024-09-11 20:38:29,397 INFO L226 Difference]: Without dead ends: 162 [2024-09-11 20:38:29,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 20:38:29,398 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:29,398 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 361 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 20:38:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-11 20:38:29,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2024-09-11 20:38:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 89 states have internal predecessors, (95), 24 states have call successors, (24), 17 states have call predecessors, (24), 23 states have return successors, (37), 27 states have call predecessors, (37), 21 states have call successors, (37) [2024-09-11 20:38:29,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2024-09-11 20:38:29,437 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 136 [2024-09-11 20:38:29,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:29,437 INFO L474 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2024-09-11 20:38:29,437 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.9) internal successors, (38), 22 states have internal predecessors, (38), 9 states have call successors, (13), 5 states have call predecessors, (13), 8 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2024-09-11 20:38:29,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:29,437 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2024-09-11 20:38:29,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-09-11 20:38:29,438 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:29,438 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:29,455 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:29,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:29,644 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:29,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:29,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1243252596, now seen corresponding path program 5 times [2024-09-11 20:38:29,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:29,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868372676] [2024-09-11 20:38:29,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:29,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41322507] [2024-09-11 20:38:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:38:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:29,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:38:29,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:38:30,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-11 20:38:30,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:30,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 337 conjuncts are in the unsatisfiable core [2024-09-11 20:38:30,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:30,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:38:30,859 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 17 treesize of output 13 [2024-09-11 20:38:30,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:30,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:38:31,369 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 [2024-09-11 20:38:33,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2024-09-11 20:38:34,678 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 61 treesize of output 41 [2024-09-11 20:38:34,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:34,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 66 [2024-09-11 20:38:34,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:38:35,285 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 68 treesize of output 44 [2024-09-11 20:38:35,292 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 32 treesize of output 20 [2024-09-11 20:38:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 156 proven. 292 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2024-09-11 20:38:35,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:43,535 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 47 treesize of output 31 [2024-09-11 20:38:43,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:43,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868372676] [2024-09-11 20:38:43,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:43,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41322507] [2024-09-11 20:38:43,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41322507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:43,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2024-09-11 20:38:43,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271173678] [2024-09-11 20:38:43,693 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:43,693 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-11 20:38:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-11 20:38:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1796, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 20:38:43,694 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 39 states, 30 states have (on average 1.7) internal successors, (51), 32 states have internal predecessors, (51), 14 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-09-11 20:38:47,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:38:56,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:39:02,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:39:06,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:39:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:06,239 INFO L93 Difference]: Finished difference Result 168 states and 193 transitions. [2024-09-11 20:39:06,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-11 20:39:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 30 states have (on average 1.7) internal successors, (51), 32 states have internal predecessors, (51), 14 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) Word has length 160 [2024-09-11 20:39:06,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:06,240 INFO L225 Difference]: With dead ends: 168 [2024-09-11 20:39:06,240 INFO L226 Difference]: Without dead ends: 166 [2024-09-11 20:39:06,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 99 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1807 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=422, Invalid=4270, Unknown=0, NotChecked=0, Total=4692 [2024-09-11 20:39:06,242 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 1753 mSolverCounterSat, 51 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1753 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:06,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 477 Invalid, 1808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1753 Invalid, 4 Unknown, 0 Unchecked, 20.1s Time] [2024-09-11 20:39:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-11 20:39:06,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 136. [2024-09-11 20:39:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 1.103448275862069) internal successors, (96), 90 states have internal predecessors, (96), 24 states have call successors, (24), 17 states have call predecessors, (24), 24 states have return successors, (39), 28 states have call predecessors, (39), 21 states have call successors, (39) [2024-09-11 20:39:06,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-09-11 20:39:06,291 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 160 [2024-09-11 20:39:06,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:06,292 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-09-11 20:39:06,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 30 states have (on average 1.7) internal successors, (51), 32 states have internal predecessors, (51), 14 states have call successors, (17), 7 states have call predecessors, (17), 11 states have return successors, (17), 13 states have call predecessors, (17), 12 states have call successors, (17) [2024-09-11 20:39:06,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:06,292 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-09-11 20:39:06,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-11 20:39:06,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:06,293 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1, 1, 1, 1] [2024-09-11 20:39:06,303 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:39:06,493 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 20:39:06,494 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:06,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash 555486332, now seen corresponding path program 1 times [2024-09-11 20:39:06,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:06,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3862302] [2024-09-11 20:39:06,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:06,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:39:06,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:06,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:39:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:39:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-11 20:39:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:39:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:39:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-11 20:39:06,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:06,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3862302] [2024-09-11 20:39:06,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3862302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:06,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673863272] [2024-09-11 20:39:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:06,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:06,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:06,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:06,847 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:39:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:06,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-11 20:39:06,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:06,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:07,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-11 20:39:07,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:07,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:39:07,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673863272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:07,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:39:07,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2024-09-11 20:39:07,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411617038] [2024-09-11 20:39:07,435 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:07,435 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:39:07,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:07,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:39:07,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:39:07,436 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 18 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-11 20:39:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:07,894 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2024-09-11 20:39:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:39:07,895 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) Word has length 74 [2024-09-11 20:39:07,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:07,896 INFO L225 Difference]: With dead ends: 147 [2024-09-11 20:39:07,896 INFO L226 Difference]: Without dead ends: 127 [2024-09-11 20:39:07,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:39:07,898 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:07,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 100 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:39:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-11 20:39:07,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2024-09-11 20:39:07,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 83 states have internal predecessors, (88), 22 states have call successors, (22), 16 states have call predecessors, (22), 22 states have return successors, (36), 26 states have call predecessors, (36), 20 states have call successors, (36) [2024-09-11 20:39:07,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 146 transitions. [2024-09-11 20:39:07,944 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 146 transitions. Word has length 74 [2024-09-11 20:39:07,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:07,944 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 146 transitions. [2024-09-11 20:39:07,944 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 11 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (17), 9 states have call predecessors, (17), 10 states have call successors, (17) [2024-09-11 20:39:07,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:07,944 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 146 transitions. [2024-09-11 20:39:07,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 20:39:07,945 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:07,945 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 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] [2024-09-11 20:39:07,960 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:39:08,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:39:08,145 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:08,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:08,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1190574005, now seen corresponding path program 1 times [2024-09-11 20:39:08,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:08,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094739683] [2024-09-11 20:39:08,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:08,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:08,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209137985] [2024-09-11 20:39:08,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:08,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:08,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:08,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:08,196 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:39:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:08,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 240 conjuncts are in the unsatisfiable core [2024-09-11 20:39:08,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:08,429 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 15 treesize of output 1 [2024-09-11 20:39:08,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:08,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:08,464 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 17 treesize of output 13 [2024-09-11 20:39:08,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-11 20:39:08,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:08,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:39:09,088 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 [2024-09-11 20:39:09,645 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 42 treesize of output 26 [2024-09-11 20:39:09,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:10,641 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 100 treesize of output 57 [2024-09-11 20:39:10,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:10,762 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:39:10,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:39:10,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2024-09-11 20:39:10,796 INFO L349 Elim1Store]: treesize reduction 24, result has 53.8 percent of original size [2024-09-11 20:39:10,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 70 [2024-09-11 20:39:11,162 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:11,162 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 129 treesize of output 169 [2024-09-11 20:39:11,179 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:11,179 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 116 treesize of output 104 [2024-09-11 20:39:11,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:11,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 86 treesize of output 178 [2024-09-11 20:39:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 54 proven. 38 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-11 20:39:11,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:15,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094739683] [2024-09-11 20:39:15,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209137985] [2024-09-11 20:39:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209137985] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:15,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:39:15,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:39:15,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185287221] [2024-09-11 20:39:15,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:15,415 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:39:15,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:15,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:39:15,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:39:15,416 INFO L87 Difference]: Start difference. First operand 126 states and 146 transitions. Second operand has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:39:19,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:19,197 INFO L93 Difference]: Finished difference Result 166 states and 199 transitions. [2024-09-11 20:39:19,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 20:39:19,198 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 75 [2024-09-11 20:39:19,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:19,199 INFO L225 Difference]: With dead ends: 166 [2024-09-11 20:39:19,199 INFO L226 Difference]: Without dead ends: 164 [2024-09-11 20:39:19,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=253, Invalid=2609, Unknown=0, NotChecked=0, Total=2862 [2024-09-11 20:39:19,200 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 79 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 48 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:19,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 215 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1150 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2024-09-11 20:39:19,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-11 20:39:19,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 160. [2024-09-11 20:39:19,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 106 states have internal predecessors, (114), 28 states have call successors, (28), 21 states have call predecessors, (28), 27 states have return successors, (46), 32 states have call predecessors, (46), 26 states have call successors, (46) [2024-09-11 20:39:19,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 188 transitions. [2024-09-11 20:39:19,274 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 188 transitions. Word has length 75 [2024-09-11 20:39:19,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:19,274 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 188 transitions. [2024-09-11 20:39:19,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-11 20:39:19,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:19,275 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 188 transitions. [2024-09-11 20:39:19,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-09-11 20:39:19,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:19,276 INFO L216 NwaCegarLoop]: trace histogram [23, 22, 22, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:39:19,284 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:39:19,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:39:19,476 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:19,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:19,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1208275500, now seen corresponding path program 6 times [2024-09-11 20:39:19,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:19,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369228667] [2024-09-11 20:39:19,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:19,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:19,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813100769] [2024-09-11 20:39:19,565 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:39:19,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:19,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:19,567 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:39:19,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:39:20,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-11 20:39:20,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:39:20,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 932 conjuncts, 317 conjuncts are in the unsatisfiable core [2024-09-11 20:39:20,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:20,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:20,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:20,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:20,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-11 20:39:20,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:39:22,268 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 31 treesize of output 19 [2024-09-11 20:39:22,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:22,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-09-11 20:39:22,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1214 backedges. 30 proven. 347 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2024-09-11 20:39:22,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:25,402 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 20 treesize of output 16 [2024-09-11 20:39:25,408 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 16 treesize of output 12 [2024-09-11 20:40:37,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369228667] [2024-09-11 20:40:37,342 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:37,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813100769] [2024-09-11 20:40:37,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813100769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:37,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:37,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:40:37,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252457991] [2024-09-11 20:40:37,342 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:37,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:40:37,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:37,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:40:37,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1183, Unknown=16, NotChecked=0, Total=1332 [2024-09-11 20:40:37,343 INFO L87 Difference]: Start difference. First operand 160 states and 188 transitions. Second operand has 27 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (19), 5 states have call predecessors, (19), 10 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-11 20:40:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:40,095 INFO L93 Difference]: Finished difference Result 184 states and 214 transitions. [2024-09-11 20:40:40,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-11 20:40:40,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (19), 5 states have call predecessors, (19), 10 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) Word has length 184 [2024-09-11 20:40:40,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:40,097 INFO L225 Difference]: With dead ends: 184 [2024-09-11 20:40:40,097 INFO L226 Difference]: Without dead ends: 180 [2024-09-11 20:40:40,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 72.9s TimeCoverageRelationStatistics Valid=250, Invalid=2086, Unknown=16, NotChecked=0, Total=2352 [2024-09-11 20:40:40,098 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 45 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:40,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 412 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1176 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 20:40:40,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-11 20:40:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 162. [2024-09-11 20:40:40,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 107 states have internal predecessors, (115), 28 states have call successors, (28), 21 states have call predecessors, (28), 28 states have return successors, (48), 33 states have call predecessors, (48), 26 states have call successors, (48) [2024-09-11 20:40:40,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2024-09-11 20:40:40,175 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 184 [2024-09-11 20:40:40,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:40,175 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2024-09-11 20:40:40,175 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.380952380952381) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (19), 5 states have call predecessors, (19), 10 states have return successors, (21), 12 states have call predecessors, (21), 9 states have call successors, (21) [2024-09-11 20:40:40,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:40,176 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2024-09-11 20:40:40,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-11 20:40:40,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:40,176 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:40,187 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 20:40:40,376 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 20:40:40,377 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:40,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:40,377 INFO L85 PathProgramCache]: Analyzing trace with hash 840521213, now seen corresponding path program 2 times [2024-09-11 20:40:40,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:40,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986702522] [2024-09-11 20:40:40,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:40,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:40,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1590474545] [2024-09-11 20:40:40,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:40:40,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:40,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:40,422 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:40:40,423 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:40:40,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:40:40,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:40:40,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-09-11 20:40:40,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:40,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:40,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:40,743 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 17 treesize of output 13 [2024-09-11 20:40:40,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:40,757 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 17 treesize of output 13 [2024-09-11 20:40:40,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:40,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:40:41,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:41,986 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 31 treesize of output 19 [2024-09-11 20:40:42,780 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 100 treesize of output 57 [2024-09-11 20:40:42,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:42,891 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:40:42,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-11 20:40:42,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2024-09-11 20:40:42,947 INFO L349 Elim1Store]: treesize reduction 26, result has 51.9 percent of original size [2024-09-11 20:40:42,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 63 [2024-09-11 20:40:43,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:40:43,406 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 128 treesize of output 172 [2024-09-11 20:40:43,429 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:40:43,430 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 122 treesize of output 110 [2024-09-11 20:40:43,525 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:40:43,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 184 [2024-09-11 20:40:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 72 proven. 48 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2024-09-11 20:40:43,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:49,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986702522] [2024-09-11 20:40:49,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:49,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590474545] [2024-09-11 20:40:49,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590474545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:49,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:49,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:40:49,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563201426] [2024-09-11 20:40:49,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:49,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:40:49,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:49,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:40:49,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1081, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:40:49,073 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:40:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:52,414 INFO L93 Difference]: Finished difference Result 202 states and 244 transitions. [2024-09-11 20:40:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:40:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) Word has length 99 [2024-09-11 20:40:52,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:52,416 INFO L225 Difference]: With dead ends: 202 [2024-09-11 20:40:52,416 INFO L226 Difference]: Without dead ends: 200 [2024-09-11 20:40:52,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 20:40:52,417 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 50 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 27 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:52,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 318 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1251 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2024-09-11 20:40:52,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-09-11 20:40:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 162. [2024-09-11 20:40:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 107 states have internal predecessors, (115), 28 states have call successors, (28), 21 states have call predecessors, (28), 28 states have return successors, (48), 33 states have call predecessors, (48), 26 states have call successors, (48) [2024-09-11 20:40:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 191 transitions. [2024-09-11 20:40:52,509 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 191 transitions. Word has length 99 [2024-09-11 20:40:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:52,509 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 191 transitions. [2024-09-11 20:40:52,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 18 states have (on average 2.0) internal successors, (36), 18 states have internal predecessors, (36), 10 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (11), 7 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:40:52,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:52,509 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 191 transitions. [2024-09-11 20:40:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-11 20:40:52,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:52,510 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 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] [2024-09-11 20:40:52,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 20:40:52,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-11 20:40:52,711 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:52,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash 65672195, now seen corresponding path program 1 times [2024-09-11 20:40:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:52,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470853031] [2024-09-11 20:40:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:40:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:40:53,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:40:53,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:40:53,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-11 20:40:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:40:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2024-09-11 20:40:53,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-11 20:40:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-11 20:40:53,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-11 20:40:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-11 20:40:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:53,869 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 30 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-11 20:40:53,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470853031] [2024-09-11 20:40:53,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470853031] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:53,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154106444] [2024-09-11 20:40:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:53,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:53,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:53,872 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:40:53,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 20:40:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:54,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-11 20:40:54,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:54,052 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 [2024-09-11 20:40:54,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:54,407 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 40 treesize of output 17 [2024-09-11 20:40:54,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:40:55,400 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 111 treesize of output 64 [2024-09-11 20:40:55,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:40:55,412 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 47 treesize of output 35 [2024-09-11 20:40:55,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 41 [2024-09-11 20:40:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 109 proven. 3 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 20:40:55,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:55,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:40:57,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154106444] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:57,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:40:57,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2024-09-11 20:40:57,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876261699] [2024-09-11 20:40:57,810 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:57,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 20:40:57,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:57,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 20:40:57,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2024-09-11 20:40:57,811 INFO L87 Difference]: Start difference. First operand 162 states and 191 transitions. Second operand has 31 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 25 states have internal predecessors, (61), 14 states have call successors, (26), 8 states have call predecessors, (26), 8 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-11 20:41:01,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:05,883 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:09,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:14,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:18,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:23,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:27,106 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:31,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:35,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:39,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:43,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:41:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:43,362 INFO L93 Difference]: Finished difference Result 205 states and 242 transitions. [2024-09-11 20:41:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 20:41:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 25 states have internal predecessors, (61), 14 states have call successors, (26), 8 states have call predecessors, (26), 8 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) Word has length 81 [2024-09-11 20:41:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:43,364 INFO L225 Difference]: With dead ends: 205 [2024-09-11 20:41:43,364 INFO L226 Difference]: Without dead ends: 155 [2024-09-11 20:41:43,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=268, Invalid=2182, Unknown=0, NotChecked=0, Total=2450 [2024-09-11 20:41:43,365 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 37 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:43,365 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 241 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 731 Invalid, 12 Unknown, 0 Unchecked, 45.0s Time] [2024-09-11 20:41:43,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-11 20:41:43,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 151. [2024-09-11 20:41:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 100 states have internal predecessors, (106), 25 states have call successors, (25), 21 states have call predecessors, (25), 26 states have return successors, (41), 29 states have call predecessors, (41), 24 states have call successors, (41) [2024-09-11 20:41:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2024-09-11 20:41:43,458 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 81 [2024-09-11 20:41:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:43,459 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2024-09-11 20:41:43,459 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 25 states have internal predecessors, (61), 14 states have call successors, (26), 8 states have call predecessors, (26), 8 states have return successors, (22), 11 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-11 20:41:43,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2024-09-11 20:41:43,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-09-11 20:41:43,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:43,460 INFO L216 NwaCegarLoop]: trace histogram [26, 25, 25, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:43,473 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-11 20:41:43,660 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-11 20:41:43,660 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:43,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:43,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1062211612, now seen corresponding path program 7 times [2024-09-11 20:41:43,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330794775] [2024-09-11 20:41:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:43,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:41:43,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226011432] [2024-09-11 20:41:43,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:41:43,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:43,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:43,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:41:43,734 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:41:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:44,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 391 conjuncts are in the unsatisfiable core [2024-09-11 20:41:44,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:44,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:44,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:44,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:44,858 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 17 treesize of output 13 [2024-09-11 20:41:44,893 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