./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --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_divbin2.i -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 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --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 20:34:51,690 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:34:51,769 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:34:51,776 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:34:51,777 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:34:51,805 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:34:51,808 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:34:51,808 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:34:51,809 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:34:51,811 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:34:51,811 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:34:51,811 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:34:51,812 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:34:51,812 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:34:51,815 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:34:51,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:34:51,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:34:51,816 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:34:51,816 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:34:51,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:34:51,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:34:51,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:34:51,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:34:51,817 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:34:51,817 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:34:51,817 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:34:51,818 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:34:51,818 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:34:51,818 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:34:51,818 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:34:51,818 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:34:51,819 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:34:51,819 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:34:51,819 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:34:51,819 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:34:51,820 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:34:51,820 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:34:51,820 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:34:51,820 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:34:51,820 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:34:51,821 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:34:51,821 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:34:51,821 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:34:52,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:34:52,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:34:52,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:34:52,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:34:52,104 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:34:52,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-11 20:34:53,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:34:53,731 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:34:53,731 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-11 20:34:53,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3deb5bd92/0c9fcb6789024cc8b9d4e3e86fc2d730/FLAG69efd84d2 [2024-09-11 20:34:54,116 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3deb5bd92/0c9fcb6789024cc8b9d4e3e86fc2d730 [2024-09-11 20:34:54,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:34:54,120 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:34:54,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:34:54,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:34:54,132 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:34:54,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,136 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c58283d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54, skipping insertion in model container [2024-09-11 20:34:54,136 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,161 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:34:54,316 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_divbin2.i[1567,1580] [2024-09-11 20:34:54,329 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:34:54,342 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:34:54,354 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_divbin2.i[1567,1580] [2024-09-11 20:34:54,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:34:54,384 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:34:54,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54 WrapperNode [2024-09-11 20:34:54,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:34:54,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:34:54,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:34:54,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:34:54,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,408 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,428 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 57 [2024-09-11 20:34:54,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:34:54,429 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:34:54,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:34:54,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:34:54,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,445 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,472 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 7, 11, 3, 7, 4]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 2, 3, 1, 3, 1]. [2024-09-11 20:34:54,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,476 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,489 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,492 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,498 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,500 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,502 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:34:54,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:34:54,507 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:34:54,507 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:34:54,508 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (1/1) ... [2024-09-11 20:34:54,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:34:54,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:54,545 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 20:34:54,548 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 20:34:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:34:54,595 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-11 20:34:54,596 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-11 20:34:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:34:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:34:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:34:54,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:34:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:34:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:34:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:34:54,598 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:34:54,599 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-11 20:34:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-11 20:34:54,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:34:54,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:34:54,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:34:54,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:34:54,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:34:54,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:34:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:34:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:34:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:34:54,602 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:34:54,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:34:54,694 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:34:54,696 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:34:54,889 INFO L? ?]: Removed 8 outVars from TransFormulas that were not future-live. [2024-09-11 20:34:54,889 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:34:54,922 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:34:54,922 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-11 20:34:54,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:34:54 BoogieIcfgContainer [2024-09-11 20:34:54,923 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:34:54,925 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:34:54,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:34:54,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:34:54,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:34:54" (1/3) ... [2024-09-11 20:34:54,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e93464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:34:54, skipping insertion in model container [2024-09-11 20:34:54,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:34:54" (2/3) ... [2024-09-11 20:34:54,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e93464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:34:54, skipping insertion in model container [2024-09-11 20:34:54,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:34:54" (3/3) ... [2024-09-11 20:34:54,931 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-11 20:34:54,946 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:34:54,946 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:34:54,999 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:34:55,005 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;@234dc2f6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:34:55,005 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:34:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 20 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:34:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-11 20:34:55,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:55,015 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:55,015 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:55,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:55,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2028572640, now seen corresponding path program 1 times [2024-09-11 20:34:55,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:55,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380050731] [2024-09-11 20:34:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:34:55,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,292 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 20:34:55,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:55,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380050731] [2024-09-11 20:34:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380050731] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:55,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:55,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-11 20:34:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440580876] [2024-09-11 20:34:55,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:55,301 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-11 20:34:55,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:55,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-11 20:34:55,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:34:55,330 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.411764705882353) internal successors, (24), 20 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 20:34:55,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:55,439 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2024-09-11 20:34:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-11 20:34:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 13 [2024-09-11 20:34:55,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:55,471 INFO L225 Difference]: With dead ends: 54 [2024-09-11 20:34:55,471 INFO L226 Difference]: Without dead ends: 30 [2024-09-11 20:34:55,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-11 20:34:55,483 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:55,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:34:55,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-11 20:34:55,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2024-09-11 20:34:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.25) internal successors, (20), 19 states have internal predecessors, (20), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:34:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-09-11 20:34:55,542 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 13 [2024-09-11 20:34:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:55,543 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-09-11 20:34:55,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 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 20:34:55,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-09-11 20:34:55,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 20:34:55,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:55,545 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:55,545 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:34:55,546 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:55,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:55,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1765858941, now seen corresponding path program 1 times [2024-09-11 20:34:55,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:55,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563680914] [2024-09-11 20:34:55,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:55,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:55,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073411071] [2024-09-11 20:34:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:55,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:55,617 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 20:34:55,619 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 20:34:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:55,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-11 20:34:55,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:55,844 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 20:34:55,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:34:55,860 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 20:34:56,039 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 20:34:56,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:34:56,121 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 20:34:56,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:34:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563680914] [2024-09-11 20:34:56,123 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:56,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073411071] [2024-09-11 20:34:56,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073411071] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:56,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:56,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:34:56,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606166603] [2024-09-11 20:34:56,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:56,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-11 20:34:56,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:56,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-11 20:34:56,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-11 20:34:56,127 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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 20:34:56,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:56,389 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-09-11 20:34:56,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:34:56,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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 14 [2024-09-11 20:34:56,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:56,392 INFO L225 Difference]: With dead ends: 54 [2024-09-11 20:34:56,393 INFO L226 Difference]: Without dead ends: 50 [2024-09-11 20:34:56,393 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:34:56,394 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:56,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 117 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:34:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-11 20:34:56,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2024-09-11 20:34:56,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-11 20:34:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2024-09-11 20:34:56,414 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 14 [2024-09-11 20:34:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:56,415 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2024-09-11 20:34:56,415 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 states have internal predecessors, (10), 2 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 20:34:56,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2024-09-11 20:34:56,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 20:34:56,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:56,419 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:56,427 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 20:34:56,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:56,620 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:56,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1894831411, now seen corresponding path program 1 times [2024-09-11 20:34:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:56,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760144166] [2024-09-11 20:34:56,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:56,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:34:56,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111318385] [2024-09-11 20:34:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:56,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:56,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:34:56,714 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 20:34:56,716 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 20:34:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:56,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-11 20:34:56,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:34:56,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:34:56,947 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 20:34:56,954 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 20:34:57,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:57,297 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 32 treesize of output 32 [2024-09-11 20:34:57,558 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:57,559 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 39 treesize of output 35 [2024-09-11 20:34:57,589 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:34:57,589 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 40 treesize of output 60 [2024-09-11 20:34:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:34:57,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:34:57,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760144166] [2024-09-11 20:34:57,986 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:34:57,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111318385] [2024-09-11 20:34:57,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111318385] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:34:57,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:34:57,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2024-09-11 20:34:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433700259] [2024-09-11 20:34:57,987 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:34:57,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:34:57,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:57,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:34:57,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:34:57,990 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:34:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:58,644 INFO L93 Difference]: Finished difference Result 104 states and 121 transitions. [2024-09-11 20:34:58,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:34:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 24 [2024-09-11 20:34:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:58,649 INFO L225 Difference]: With dead ends: 104 [2024-09-11 20:34:58,650 INFO L226 Difference]: Without dead ends: 96 [2024-09-11 20:34:58,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:34:58,652 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:58,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 128 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:34:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-11 20:34:58,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2024-09-11 20:34:58,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 60 states have (on average 1.2) internal successors, (72), 64 states have internal predecessors, (72), 16 states have call successors, (16), 13 states have call predecessors, (16), 13 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-11 20:34:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-09-11 20:34:58,693 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 24 [2024-09-11 20:34:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:58,693 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-09-11 20:34:58,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:34:58,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:58,694 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-09-11 20:34:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-11 20:34:58,697 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:58,697 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:58,705 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 20:34:58,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:34:58,898 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash -892537059, now seen corresponding path program 1 times [2024-09-11 20:34:58,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:58,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151399415] [2024-09-11 20:34:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:58,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:58,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:59,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:34:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:59,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:34:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:34:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:34:59,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:34:59,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151399415] [2024-09-11 20:34:59,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151399415] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:34:59,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:34:59,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-11 20:34:59,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958985976] [2024-09-11 20:34:59,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:34:59,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-11 20:34:59,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:34:59,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-11 20:34:59,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-11 20:34:59,574 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:34:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:34:59,767 INFO L93 Difference]: Finished difference Result 102 states and 120 transitions. [2024-09-11 20:34:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:34:59,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-09-11 20:34:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:34:59,769 INFO L225 Difference]: With dead ends: 102 [2024-09-11 20:34:59,769 INFO L226 Difference]: Without dead ends: 52 [2024-09-11 20:34:59,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:34:59,771 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:34:59,772 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:34:59,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-11 20:34:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-09-11 20:34:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:34:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2024-09-11 20:34:59,787 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 25 [2024-09-11 20:34:59,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:34:59,788 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2024-09-11 20:34:59,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:34:59,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:59,789 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2024-09-11 20:34:59,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 20:34:59,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:34:59,790 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:34:59,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-11 20:34:59,790 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:34:59,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:34:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -2009202886, now seen corresponding path program 1 times [2024-09-11 20:34:59,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:34:59,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101668545] [2024-09-11 20:34:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:34:59,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:34:59,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:00,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:00,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:35:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:35:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:35:00,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:00,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101668545] [2024-09-11 20:35:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101668545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564753341] [2024-09-11 20:35:00,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:00,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:00,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:00,597 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 20:35:00,605 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 20:35:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:00,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-11 20:35:00,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:00,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:00,714 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 20:35:00,886 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 20:35:01,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:35:01,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:01,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564753341] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:01,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:35:01,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-11 20:35:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209986463] [2024-09-11 20:35:01,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:01,702 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 20:35:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 20:35:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:35:01,704 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 20 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:35:02,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:02,195 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2024-09-11 20:35:02,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:35:02,196 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 30 [2024-09-11 20:35:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:02,197 INFO L225 Difference]: With dead ends: 61 [2024-09-11 20:35:02,198 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:35:02,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:35:02,199 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:02,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:35:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:35:02,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2024-09-11 20:35:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 37 states have internal predecessors, (41), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-11 20:35:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2024-09-11 20:35:02,227 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 30 [2024-09-11 20:35:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:02,227 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2024-09-11 20:35:02,227 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 2.3125) internal successors, (37), 18 states have internal predecessors, (37), 7 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:35:02,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2024-09-11 20:35:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 20:35:02,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:02,232 INFO L216 NwaCegarLoop]: trace histogram [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 20:35:02,249 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:35:02,432 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 20:35:02,432 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:02,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1658515978, now seen corresponding path program 1 times [2024-09-11 20:35:02,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:02,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067062779] [2024-09-11 20:35:02,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:02,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:35:02,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [812233583] [2024-09-11 20:35:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:02,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:02,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:02,532 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 20:35:02,534 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 20:35:02,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:02,744 WARN L260 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-11 20:35:02,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:02,757 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 15 treesize of output 11 [2024-09-11 20:35:02,768 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 20:35:02,773 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 20:35:02,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:02,784 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 20:35:03,132 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 20:35:03,592 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-11 20:35:03,593 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 21 [2024-09-11 20:35:03,600 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 20:35:03,668 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:35:03,668 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 20:35:03,708 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-11 20:35:03,709 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 40 treesize of output 51 [2024-09-11 20:35:04,044 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:04,044 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 88 treesize of output 140 [2024-09-11 20:35:04,128 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:04,128 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 126 treesize of output 198 [2024-09-11 20:35:04,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:35:04,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:19,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067062779] [2024-09-11 20:35:19,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:35:19,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812233583] [2024-09-11 20:35:19,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812233583] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:19,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:35:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-11 20:35:19,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078751241] [2024-09-11 20:35:19,310 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:19,310 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:35:19,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:35:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=840, Unknown=3, NotChecked=0, Total=930 [2024-09-11 20:35:19,312 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:35:28,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:35:28,863 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2024-09-11 20:35:28,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:35:28,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2024-09-11 20:35:28,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:35:28,866 INFO L225 Difference]: With dead ends: 84 [2024-09-11 20:35:28,866 INFO L226 Difference]: Without dead ends: 80 [2024-09-11 20:35:28,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=163, Invalid=1472, Unknown=5, NotChecked=0, Total=1640 [2024-09-11 20:35:28,867 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:35:28,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 190 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 20:35:28,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-11 20:35:28,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-11 20:35:28,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 54 states have internal predecessors, (60), 13 states have call successors, (13), 11 states have call predecessors, (13), 13 states have return successors, (22), 13 states have call predecessors, (22), 11 states have call successors, (22) [2024-09-11 20:35:28,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2024-09-11 20:35:28,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 31 [2024-09-11 20:35:28,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:35:28,894 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2024-09-11 20:35:28,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:35:28,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2024-09-11 20:35:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-11 20:35:28,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:35:28,896 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:35:28,905 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 20:35:29,100 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 20:35:29,101 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:35:29,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:35:29,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1145154431, now seen corresponding path program 2 times [2024-09-11 20:35:29,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:35:29,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824053668] [2024-09-11 20:35:29,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:35:29,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:35:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:29,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:35:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:29,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:29,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:35:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:29,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-11 20:35:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:30,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:35:30,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:35:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 20:35:30,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:35:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824053668] [2024-09-11 20:35:30,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824053668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016308756] [2024-09-11 20:35:30,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:35:30,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:35:30,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:35:30,022 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 20:35:30,026 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 20:35:30,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:35:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:35:30,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-09-11 20:35:30,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:35:30,156 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 20:35:30,163 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 20:35:30,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:30,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:35:30,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:35:30,902 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 20:35:30,996 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:35:30,997 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 41 treesize of output 37 [2024-09-11 20:35:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:35:51,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:35:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016308756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:35:53,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:35:53,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 32 [2024-09-11 20:35:53,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521307084] [2024-09-11 20:35:53,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:35:53,177 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-11 20:35:53,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:35:53,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-11 20:35:53,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1395, Unknown=5, NotChecked=0, Total=1560 [2024-09-11 20:35:53,181 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 27 states have internal predecessors, (44), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:36:35,594 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 20:36:55,700 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 20:36:55,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:55,895 INFO L93 Difference]: Finished difference Result 149 states and 174 transitions. [2024-09-11 20:36:55,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-11 20:36:55,895 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 27 states have internal predecessors, (44), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Word has length 36 [2024-09-11 20:36:55,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:55,899 INFO L225 Difference]: With dead ends: 149 [2024-09-11 20:36:55,899 INFO L226 Difference]: Without dead ends: 141 [2024-09-11 20:36:55,901 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 75.0s TimeCoverageRelationStatistics Valid=518, Invalid=3886, Unknown=18, NotChecked=0, Total=4422 [2024-09-11 20:36:55,901 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 39 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:55,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 177 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1159 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2024-09-11 20:36:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-11 20:36:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 131. [2024-09-11 20:36:55,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 86 states have (on average 1.1627906976744187) internal successors, (100), 90 states have internal predecessors, (100), 21 states have call successors, (21), 18 states have call predecessors, (21), 23 states have return successors, (34), 23 states have call predecessors, (34), 18 states have call successors, (34) [2024-09-11 20:36:55,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 155 transitions. [2024-09-11 20:36:55,963 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 155 transitions. Word has length 36 [2024-09-11 20:36:55,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:55,964 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 155 transitions. [2024-09-11 20:36:55,964 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 27 states have internal predecessors, (44), 11 states have call successors, (11), 7 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:36:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:55,965 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 155 transitions. [2024-09-11 20:36:55,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-11 20:36:55,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:55,969 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:36:55,986 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 20:36:56,169 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-11 20:36:56,169 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:36:56,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:56,170 INFO L85 PathProgramCache]: Analyzing trace with hash -642817649, now seen corresponding path program 2 times [2024-09-11 20:36:56,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:36:56,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854248707] [2024-09-11 20:36:56,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:36:56,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:36:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:36:56,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441832422] [2024-09-11 20:36:56,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:36:56,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:36:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:36:56,246 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 20:36:56,247 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 20:36:56,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:36:56,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:36:56,433 WARN L260 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 182 conjuncts are in the unsatisfiable core [2024-09-11 20:36:56,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:36:56,443 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:36:56,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:36:56,452 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 20:36:56,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:36:56,840 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 20:36:57,163 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-11 20:36:57,163 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 21 [2024-09-11 20:36:57,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2024-09-11 20:36:57,241 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:36:57,241 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 20:36:57,276 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-11 20:36:57,276 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 55 treesize of output 60 [2024-09-11 20:36:57,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:57,565 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 119 treesize of output 159 [2024-09-11 20:36:57,585 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 91 treesize of output 71 [2024-09-11 20:36:57,654 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:36:57,655 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 81 treesize of output 161 [2024-09-11 20:36:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:36:57,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:36:58,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:36:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854248707] [2024-09-11 20:36:58,460 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:36:58,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441832422] [2024-09-11 20:36:58,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441832422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:36:58,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:36:58,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-11 20:36:58,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79674464] [2024-09-11 20:36:58,461 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:36:58,461 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 20:36:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:36:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 20:36:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:36:58,462 INFO L87 Difference]: Start difference. First operand 131 states and 155 transitions. Second operand has 20 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:36:59,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:36:59,824 INFO L93 Difference]: Finished difference Result 162 states and 193 transitions. [2024-09-11 20:36:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:36:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2024-09-11 20:36:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:36:59,826 INFO L225 Difference]: With dead ends: 162 [2024-09-11 20:36:59,827 INFO L226 Difference]: Without dead ends: 160 [2024-09-11 20:36:59,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:36:59,828 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 34 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:36:59,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 334 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 585 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 20:36:59,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-11 20:36:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 119. [2024-09-11 20:36:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 83 states have internal predecessors, (92), 19 states have call successors, (19), 16 states have call predecessors, (19), 21 states have return successors, (30), 20 states have call predecessors, (30), 16 states have call successors, (30) [2024-09-11 20:36:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2024-09-11 20:36:59,874 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 37 [2024-09-11 20:36:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:36:59,875 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2024-09-11 20:36:59,875 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.375) internal successors, (22), 14 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:36:59,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:36:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2024-09-11 20:36:59,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:36:59,876 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:36:59,876 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:36:59,884 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 20:37:00,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:00,077 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:00,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:00,078 INFO L85 PathProgramCache]: Analyzing trace with hash -14465784, now seen corresponding path program 3 times [2024-09-11 20:37:00,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:00,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886219017] [2024-09-11 20:37:00,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:00,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:00,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:37:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:00,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:00,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:37:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:37:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:37:01,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:01,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886219017] [2024-09-11 20:37:01,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886219017] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:01,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36123701] [2024-09-11 20:37:01,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:37:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:01,336 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 20:37:01,337 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 20:37:01,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 20:37:01,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:01,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 20:37:01,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:01,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:01,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 16 [2024-09-11 20:37:01,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:01,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 20:37:01,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 20:37:02,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 20:37:02,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-11 20:37:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 20:37:02,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:37:02,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36123701] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:37:02,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:02,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [18] total 24 [2024-09-11 20:37:02,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544281874] [2024-09-11 20:37:02,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:37:02,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:37:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:02,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:37:02,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:37:02,108 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:37:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:02,381 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2024-09-11 20:37:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:37:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2024-09-11 20:37:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:02,383 INFO L225 Difference]: With dead ends: 129 [2024-09-11 20:37:02,383 INFO L226 Difference]: Without dead ends: 123 [2024-09-11 20:37:02,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:37:02,384 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:02,384 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 61 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:37:02,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-11 20:37:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2024-09-11 20:37:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1772151898734178) internal successors, (93), 84 states have internal predecessors, (93), 19 states have call successors, (19), 16 states have call predecessors, (19), 22 states have return successors, (31), 20 states have call predecessors, (31), 16 states have call successors, (31) [2024-09-11 20:37:02,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2024-09-11 20:37:02,445 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 42 [2024-09-11 20:37:02,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:02,445 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2024-09-11 20:37:02,445 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:37:02,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:02,446 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2024-09-11 20:37:02,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:37:02,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:02,447 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:02,455 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-11 20:37:02,651 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:02,652 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:02,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 48792040, now seen corresponding path program 3 times [2024-09-11 20:37:02,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:02,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134216449] [2024-09-11 20:37:02,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:02,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:02,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1377079839] [2024-09-11 20:37:02,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:37:02,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:02,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:02,695 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 20:37:02,697 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 20:37:03,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-11 20:37:03,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:03,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-11 20:37:03,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:03,125 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 20:37:03,133 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 20:37:03,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:03,389 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 20:37:03,393 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 20:37:03,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2024-09-11 20:37:03,410 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 20:37:03,480 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 25 treesize of output 17 [2024-09-11 20:37:03,483 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 20:37:03,485 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 20:37:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-11 20:37:03,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134216449] [2024-09-11 20:37:04,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:04,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377079839] [2024-09-11 20:37:04,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377079839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:04,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-11 20:37:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574479372] [2024-09-11 20:37:04,138 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:04,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:37:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:37:04,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:37:04,140 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:37:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:04,521 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2024-09-11 20:37:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:37:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2024-09-11 20:37:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:04,523 INFO L225 Difference]: With dead ends: 157 [2024-09-11 20:37:04,523 INFO L226 Difference]: Without dead ends: 155 [2024-09-11 20:37:04,524 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:37:04,524 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 34 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:04,525 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 169 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:37:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-11 20:37:04,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 149. [2024-09-11 20:37:04,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 97 states have (on average 1.1649484536082475) internal successors, (113), 104 states have internal predecessors, (113), 23 states have call successors, (23), 20 states have call predecessors, (23), 28 states have return successors, (40), 24 states have call predecessors, (40), 20 states have call successors, (40) [2024-09-11 20:37:04,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 176 transitions. [2024-09-11 20:37:04,578 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 176 transitions. Word has length 43 [2024-09-11 20:37:04,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:04,579 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 176 transitions. [2024-09-11 20:37:04,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-11 20:37:04,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:04,579 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 176 transitions. [2024-09-11 20:37:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-11 20:37:04,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:04,580 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:04,593 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:37:04,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:04,781 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:04,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1086099972, now seen corresponding path program 4 times [2024-09-11 20:37:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:04,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917560064] [2024-09-11 20:37:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:06,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:37:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:06,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:37:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:06,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-11 20:37:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:06,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-11 20:37:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:37:06,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:06,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917560064] [2024-09-11 20:37:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917560064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068034447] [2024-09-11 20:37:06,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:37:06,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:06,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:06,721 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 20:37:06,723 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 20:37:06,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:37:06,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:06,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-11 20:37:06,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:06,947 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 20:37:06,956 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 20:37:06,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:06,965 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:37:07,352 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 20:37:07,663 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 20:37:07,970 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 7 treesize of output 3 [2024-09-11 20:37:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:37:08,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:09,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068034447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:09,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:37:09,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 35 [2024-09-11 20:37:09,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349544720] [2024-09-11 20:37:09,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:09,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-11 20:37:09,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:09,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-11 20:37:09,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1838, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 20:37:09,208 INFO L87 Difference]: Start difference. First operand 149 states and 176 transitions. Second operand has 35 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 20:37:11,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:11,723 INFO L93 Difference]: Finished difference Result 236 states and 274 transitions. [2024-09-11 20:37:11,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 20:37:11,723 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 42 [2024-09-11 20:37:11,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:11,725 INFO L225 Difference]: With dead ends: 236 [2024-09-11 20:37:11,725 INFO L226 Difference]: Without dead ends: 182 [2024-09-11 20:37:11,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=406, Invalid=4284, Unknown=2, NotChecked=0, Total=4692 [2024-09-11 20:37:11,727 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 27 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:11,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 169 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1172 Invalid, 3 Unknown, 0 Unchecked, 1.0s Time] [2024-09-11 20:37:11,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-09-11 20:37:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2024-09-11 20:37:11,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 122 states have internal predecessors, (131), 27 states have call successors, (27), 24 states have call predecessors, (27), 33 states have return successors, (45), 29 states have call predecessors, (45), 24 states have call successors, (45) [2024-09-11 20:37:11,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 203 transitions. [2024-09-11 20:37:11,805 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 203 transitions. Word has length 42 [2024-09-11 20:37:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:11,806 INFO L474 AbstractCegarLoop]: Abstraction has 176 states and 203 transitions. [2024-09-11 20:37:11,806 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (14), 10 states have call predecessors, (14), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 20:37:11,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 203 transitions. [2024-09-11 20:37:11,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:37:11,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:11,808 INFO L216 NwaCegarLoop]: trace histogram [3, 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 20:37:11,824 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 20:37:12,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:37:12,008 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:12,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:12,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1630059440, now seen corresponding path program 1 times [2024-09-11 20:37:12,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:12,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054803357] [2024-09-11 20:37:12,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:12,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:12,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457871577] [2024-09-11 20:37:12,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:12,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:12,045 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 20:37:12,047 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 20:37:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:37:12,439 WARN L260 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 202 conjuncts are in the unsatisfiable core [2024-09-11 20:37:12,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:12,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:12,458 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 20:37:12,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:12,468 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 20:37:12,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:12,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:12,846 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 20:37:12,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:12,912 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 32 treesize of output 32 [2024-09-11 20:37:13,401 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 8 treesize of output 1 [2024-09-11 20:37:14,762 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-11 20:37:14,762 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 49 treesize of output 56 [2024-09-11 20:37:14,797 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-11 20:37:14,798 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 3 [2024-09-11 20:37:14,806 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-09-11 20:37:14,807 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 15 treesize of output 7 [2024-09-11 20:37:14,901 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 20:37:14,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:14,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 242 [2024-09-11 20:37:15,023 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:15,023 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 67 treesize of output 115 [2024-09-11 20:37:15,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:37:15,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:23,366 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (= (mod (select (select |c_#memory_int#5| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|) 4294967296) (mod (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|)) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_4|)) 4294967296)))) (.cse0 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_37_to_44_0_#in~b.base|) |c_func_to_recursive_line_37_to_44_0_#in~b.offset|))) (and (or (= (mod (select (select |c_#memory_int#5| |c_func_to_recursive_line_37_to_44_0_#in~A.base|) |c_func_to_recursive_line_37_to_44_0_#in~A.offset|) 4294967296) (mod (+ (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_37_to_44_0_#in~r.base|) |c_func_to_recursive_line_37_to_44_0_#in~r.offset|) (* .cse0 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_37_to_44_0_#in~q.base|) |c_func_to_recursive_line_37_to_44_0_#in~q.offset|))) 4294967296)) .cse1) (forall ((|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (let ((.cse2 (mod (select (select |c_#memory_int#5| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|) 4294967296))) (or (= .cse2 (mod (+ (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|) (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|)) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_4|)) 4294967296)) (not (= .cse2 (mod (+ (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_4|) (* (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|) (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|))) 4294967296)))))) (or .cse1 (= (mod (select (select |c_#memory_int#3| |c_func_to_recursive_line_37_to_44_0_#in~B.base|) |c_func_to_recursive_line_37_to_44_0_#in~B.offset|) 4294967296) (mod .cse0 4294967296))))) is different from false [2024-09-11 20:37:24,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054803357] [2024-09-11 20:37:24,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:24,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457871577] [2024-09-11 20:37:24,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457871577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:24,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:24,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:37:24,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988662609] [2024-09-11 20:37:24,868 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:24,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:37:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:24,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:37:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1010, Unknown=1, NotChecked=64, Total=1190 [2024-09-11 20:37:24,869 INFO L87 Difference]: Start difference. First operand 176 states and 203 transitions. Second operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:37:30,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:37:30,199 INFO L93 Difference]: Finished difference Result 182 states and 208 transitions. [2024-09-11 20:37:30,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-11 20:37:30,200 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-09-11 20:37:30,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:37:30,201 INFO L225 Difference]: With dead ends: 182 [2024-09-11 20:37:30,201 INFO L226 Difference]: Without dead ends: 147 [2024-09-11 20:37:30,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=287, Invalid=2578, Unknown=1, NotChecked=104, Total=2970 [2024-09-11 20:37:30,203 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 12 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:37:30,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 215 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 629 Invalid, 2 Unknown, 0 Unchecked, 2.1s Time] [2024-09-11 20:37:30,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-11 20:37:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-09-11 20:37:30,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 96 states have (on average 1.15625) internal successors, (111), 102 states have internal predecessors, (111), 23 states have call successors, (23), 20 states have call predecessors, (23), 27 states have return successors, (39), 24 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-11 20:37:30,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 173 transitions. [2024-09-11 20:37:30,263 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 173 transitions. Word has length 43 [2024-09-11 20:37:30,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:37:30,263 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 173 transitions. [2024-09-11 20:37:30,263 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:37:30,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:30,264 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 173 transitions. [2024-09-11 20:37:30,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:37:30,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:37:30,264 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:37:30,273 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 20:37:30,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-11 20:37:30,465 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:37:30,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:37:30,466 INFO L85 PathProgramCache]: Analyzing trace with hash -608422709, now seen corresponding path program 5 times [2024-09-11 20:37:30,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:37:30,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27586189] [2024-09-11 20:37:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:37:30,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:37:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:37:30,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [166746848] [2024-09-11 20:37:30,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:37:30,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:37:30,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:37:30,548 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 20:37:30,550 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 20:37:31,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-11 20:37:31,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:37:31,072 WARN L260 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 292 conjuncts are in the unsatisfiable core [2024-09-11 20:37:31,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:37:31,093 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 20:37:31,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:37:31,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:31,125 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 20:37:31,132 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 20:37:31,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:37:32,127 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 20:37:33,486 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-11 20:37:33,487 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 21 [2024-09-11 20:37:33,503 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 20:37:33,663 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-11 20:37:33,663 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 25 [2024-09-11 20:37:33,713 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-11 20:37:33,713 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 58 treesize of output 53 [2024-09-11 20:37:35,732 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 20:37:35,777 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 20:37:35,940 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 20:37:36,022 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-11 20:37:36,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 100 [2024-09-11 20:37:37,537 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:37,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 194 treesize of output 446 [2024-09-11 20:37:37,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:37:37,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 104 treesize of output 292 [2024-09-11 20:37:40,202 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:37:40,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:37:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:37:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27586189] [2024-09-11 20:37:57,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:37:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166746848] [2024-09-11 20:37:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166746848] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:37:57,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:37:57,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-11 20:37:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637307128] [2024-09-11 20:37:57,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:37:57,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 20:37:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:37:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 20:37:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2000, Unknown=2, NotChecked=0, Total=2162 [2024-09-11 20:37:57,075 INFO L87 Difference]: Start difference. First operand 147 states and 173 transitions. Second operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 23 states have internal predecessors, (32), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:38:07,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:07,067 INFO L93 Difference]: Finished difference Result 173 states and 205 transitions. [2024-09-11 20:38:07,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-11 20:38:07,067 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 1.28) internal successors, (32), 23 states have internal predecessors, (32), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 48 [2024-09-11 20:38:07,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:07,069 INFO L225 Difference]: With dead ends: 173 [2024-09-11 20:38:07,069 INFO L226 Difference]: Without dead ends: 161 [2024-09-11 20:38:07,070 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 24.0s TimeCoverageRelationStatistics Valid=302, Invalid=3355, Unknown=3, NotChecked=0, Total=3660 [2024-09-11 20:38:07,070 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:07,071 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 375 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1089 Invalid, 2 Unknown, 0 Unchecked, 2.8s Time] [2024-09-11 20:38:07,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-11 20:38:07,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2024-09-11 20:38:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 104 states have (on average 1.1538461538461537) internal successors, (120), 110 states have internal predecessors, (120), 25 states have call successors, (25), 22 states have call predecessors, (25), 28 states have return successors, (41), 25 states have call predecessors, (41), 22 states have call successors, (41) [2024-09-11 20:38:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 186 transitions. [2024-09-11 20:38:07,135 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 186 transitions. Word has length 48 [2024-09-11 20:38:07,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:07,135 INFO L474 AbstractCegarLoop]: Abstraction has 158 states and 186 transitions. [2024-09-11 20:38:07,135 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 1.28) internal successors, (32), 23 states have internal predecessors, (32), 8 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:38:07,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:07,136 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 186 transitions. [2024-09-11 20:38:07,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-11 20:38:07,136 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:07,136 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:07,145 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:07,337 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:07,337 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:07,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:07,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1417769335, now seen corresponding path program 1 times [2024-09-11 20:38:07,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:07,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949214237] [2024-09-11 20:38:07,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:07,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:38:07,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772114035] [2024-09-11 20:38:07,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:07,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:07,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:07,403 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 20:38:07,409 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 20:38:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:07,661 WARN L260 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 269 conjuncts are in the unsatisfiable core [2024-09-11 20:38:07,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:07,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:07,680 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 20:38:07,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:07,703 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 20:38:07,714 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 20:38:08,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:08,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:08,730 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 20:38:09,611 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 20:38:09,656 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-11 20:38:09,656 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 21 [2024-09-11 20:38:09,840 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-11 20:38:09,841 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 58 treesize of output 61 [2024-09-11 20:38:09,943 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-11 20:38:09,944 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 20:38:11,848 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 20:38:11,889 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 20:38:12,546 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:12,546 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 88 treesize of output 140 [2024-09-11 20:38:12,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:12,641 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 90 treesize of output 166 [2024-09-11 20:38:13,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-11 20:38:13,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:33,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949214237] [2024-09-11 20:38:33,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:38:33,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772114035] [2024-09-11 20:38:33,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772114035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:33,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:38:33,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-11 20:38:33,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601432073] [2024-09-11 20:38:33,348 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:33,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:38:33,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:33,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:38:33,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1417, Unknown=3, NotChecked=0, Total=1560 [2024-09-11 20:38:33,350 INFO L87 Difference]: Start difference. First operand 158 states and 186 transitions. Second operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-11 20:38:38,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:38,549 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2024-09-11 20:38:38,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-11 20:38:38,550 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 48 [2024-09-11 20:38:38,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:38,551 INFO L225 Difference]: With dead ends: 197 [2024-09-11 20:38:38,551 INFO L226 Difference]: Without dead ends: 145 [2024-09-11 20:38:38,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=244, Invalid=2203, Unknown=3, NotChecked=0, Total=2450 [2024-09-11 20:38:38,553 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:38,553 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 325 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 853 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2024-09-11 20:38:38,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-11 20:38:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2024-09-11 20:38:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 89 states have internal predecessors, (97), 21 states have call successors, (21), 18 states have call predecessors, (21), 22 states have return successors, (32), 21 states have call predecessors, (32), 18 states have call successors, (32) [2024-09-11 20:38:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 150 transitions. [2024-09-11 20:38:38,611 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 150 transitions. Word has length 48 [2024-09-11 20:38:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:38,612 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 150 transitions. [2024-09-11 20:38:38,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 19 states have internal predecessors, (30), 7 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-11 20:38:38,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 150 transitions. [2024-09-11 20:38:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-11 20:38:38,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:38,613 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:38,621 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:38,814 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:38:38,814 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:38,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:38,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1568112992, now seen corresponding path program 1 times [2024-09-11 20:38:38,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:38,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117155482] [2024-09-11 20:38:38,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:38,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:39,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:38:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:39,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:40,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:40,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:40,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-11 20:38:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:40,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:38:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:40,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:38:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:41,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:38:41,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-11 20:38:41,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:41,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117155482] [2024-09-11 20:38:41,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117155482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:41,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45267522] [2024-09-11 20:38:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:41,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:41,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:41,081 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 20:38:41,082 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 20:38:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:41,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 160 conjuncts are in the unsatisfiable core [2024-09-11 20:38:41,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:41,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:41,258 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 20:38:41,270 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 20:38:41,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:42,136 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 20:38:43,738 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:38:43,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:38:47,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45267522] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:47,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:38:47,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2024-09-11 20:38:47,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538384733] [2024-09-11 20:38:47,676 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:38:47,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-11 20:38:47,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:38:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-11 20:38:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2427, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 20:38:47,678 INFO L87 Difference]: Start difference. First operand 129 states and 150 transitions. Second operand has 39 states, 30 states have (on average 2.0) internal successors, (60), 35 states have internal predecessors, (60), 15 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-11 20:38:53,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:38:53,938 INFO L93 Difference]: Finished difference Result 183 states and 239 transitions. [2024-09-11 20:38:53,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-11 20:38:53,939 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 30 states have (on average 2.0) internal successors, (60), 35 states have internal predecessors, (60), 15 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) Word has length 55 [2024-09-11 20:38:53,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:38:53,940 INFO L225 Difference]: With dead ends: 183 [2024-09-11 20:38:53,940 INFO L226 Difference]: Without dead ends: 171 [2024-09-11 20:38:53,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=699, Invalid=6273, Unknown=0, NotChecked=0, Total=6972 [2024-09-11 20:38:53,943 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:38:53,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 246 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-11 20:38:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2024-09-11 20:38:54,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2024-09-11 20:38:54,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 99 states have (on average 1.1313131313131313) internal successors, (112), 105 states have internal predecessors, (112), 24 states have call successors, (24), 19 states have call predecessors, (24), 33 states have return successors, (58), 32 states have call predecessors, (58), 21 states have call successors, (58) [2024-09-11 20:38:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 194 transitions. [2024-09-11 20:38:54,032 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 194 transitions. Word has length 55 [2024-09-11 20:38:54,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:38:54,032 INFO L474 AbstractCegarLoop]: Abstraction has 157 states and 194 transitions. [2024-09-11 20:38:54,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 30 states have (on average 2.0) internal successors, (60), 35 states have internal predecessors, (60), 15 states have call successors, (16), 7 states have call predecessors, (16), 14 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2024-09-11 20:38:54,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 194 transitions. [2024-09-11 20:38:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-11 20:38:54,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:38:54,034 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:38:54,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 20:38:54,234 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:38:54,235 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:38:54,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:38:54,235 INFO L85 PathProgramCache]: Analyzing trace with hash -530571015, now seen corresponding path program 2 times [2024-09-11 20:38:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:38:54,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748548260] [2024-09-11 20:38:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:38:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:38:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:54,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:38:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:55,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:55,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:56,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:56,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-11 20:38:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:56,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-11 20:38:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:56,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:38:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:56,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:38:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:57,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:38:57,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:38:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:38:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:38:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748548260] [2024-09-11 20:38:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748548260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:38:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662732818] [2024-09-11 20:38:57,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:38:57,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:38:57,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:38:57,242 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 20:38:57,243 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 20:38:57,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:38:57,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:38:57,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-11 20:38:57,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:38:57,410 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 20:38:57,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:57,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:38:57,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:38:59,300 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 20:38:59,476 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:38:59,477 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 32 treesize of output 32