./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 --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 20:39:18,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:39:18,762 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:39:18,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:39:18,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:39:18,795 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:39:18,795 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:39:18,796 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:39:18,796 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:39:18,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:39:18,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:39:18,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:39:18,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:39:18,798 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:39:18,799 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:39:18,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:39:18,800 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:39:18,800 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:39:18,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:39:18,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:39:18,801 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:39:18,801 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:39:18,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:39:18,802 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:39:18,802 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:39:18,803 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:39:18,803 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:39:18,803 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:39:18,804 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:39:18,804 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:39:18,804 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:39:18,804 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:39:18,805 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:39:18,805 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:39:18,805 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:39:18,805 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:39:18,806 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:39:18,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:39:18,806 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:39:18,806 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:39:18,807 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:39:18,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:39:18,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 305ef194ca8c72f4da0a6deb18ed40b72305718d65c18a21aa3fcb3830c499e5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:39:19,096 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:39:19,129 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:39:19,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:39:19,134 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:39:19,134 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:39:19,135 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-11 20:39:20,565 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:39:20,770 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:39:20,774 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_mannadiv.c [2024-09-11 20:39:20,789 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/974cc2261/4e3ae16b8d584014bf299b0c6252af5e/FLAG8f6dfec8f [2024-09-11 20:39:20,810 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/974cc2261/4e3ae16b8d584014bf299b0c6252af5e [2024-09-11 20:39:20,814 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:39:20,816 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:39:20,818 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:39:20,819 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:39:20,824 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:39:20,825 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:39:20" (1/1) ... [2024-09-11 20:39:20,826 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cd08f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:20, skipping insertion in model container [2024-09-11 20:39:20,826 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:39:20" (1/1) ... [2024-09-11 20:39:20,850 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:39:21,014 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_mannadiv.c[1105,1118] [2024-09-11 20:39:21,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:39:21,058 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:39:21,069 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_mannadiv.c[1105,1118] [2024-09-11 20:39:21,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:39:21,104 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:39:21,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21 WrapperNode [2024-09-11 20:39:21,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:39:21,105 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:39:21,105 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:39:21,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:39:21,113 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,122 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,142 INFO L138 Inliner]: procedures = 16, calls = 57, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2024-09-11 20:39:21,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:39:21,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:39:21,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:39:21,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:39:21,160 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,160 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,162 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,187 INFO L175 MemorySlicer]: Split 31 memory accesses to 6 slices as follows [2, 5, 7, 7, 5, 5]. 23 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, 1, 3, 3, 1, 2]. [2024-09-11 20:39:21,188 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,188 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,195 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,197 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,199 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,200 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:39:21,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:39:21,203 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:39:21,203 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:39:21,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (1/1) ... [2024-09-11 20:39:21,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:39:21,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:21,244 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 20:39:21,246 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 20:39:21,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:39:21,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-11 20:39:21,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-11 20:39:21,288 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_31_to_42_0 [2024-09-11 20:39:21,288 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_31_to_42_0 [2024-09-11 20:39:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:39:21,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:39:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:39:21,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:39:21,290 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:39:21,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:39:21,378 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:39:21,380 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:39:21,599 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-11 20:39:21,599 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:39:21,630 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:39:21,630 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-11 20:39:21,631 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:39:21 BoogieIcfgContainer [2024-09-11 20:39:21,631 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:39:21,633 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:39:21,633 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:39:21,638 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:39:21,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:39:20" (1/3) ... [2024-09-11 20:39:21,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80c5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:39:21, skipping insertion in model container [2024-09-11 20:39:21,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:39:21" (2/3) ... [2024-09-11 20:39:21,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e80c5b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:39:21, skipping insertion in model container [2024-09-11 20:39:21,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:39:21" (3/3) ... [2024-09-11 20:39:21,640 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_mannadiv.c [2024-09-11 20:39:21,661 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:39:21,661 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:39:21,723 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:39:21,732 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;@2eacc86b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:39:21,733 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:39:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.3333333333333333) 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 20:39:21,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:39:21,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:21,751 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:39:21,752 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:21,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:21,757 INFO L85 PathProgramCache]: Analyzing trace with hash 432807151, now seen corresponding path program 1 times [2024-09-11 20:39:21,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750657296] [2024-09-11 20:39:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:22,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:39:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:22,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:39:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:39:22,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:22,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750657296] [2024-09-11 20:39:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750657296] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:39:22,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:39:22,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-11 20:39:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732735479] [2024-09-11 20:39:22,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:39:22,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-11 20:39:22,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:22,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-11 20:39:22,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:39:22,068 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.3333333333333333) 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 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:39:22,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:22,110 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-09-11 20:39:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-11 20:39:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-11 20:39:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:22,119 INFO L225 Difference]: With dead ends: 56 [2024-09-11 20:39:22,120 INFO L226 Difference]: Without dead ends: 27 [2024-09-11 20:39:22,123 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-11 20:39:22,126 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:22,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:39:22,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-11 20:39:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-11 20:39:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.1764705882352942) 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 20:39:22,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-09-11 20:39:22,160 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2024-09-11 20:39:22,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:22,161 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-09-11 20:39:22,161 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:39:22,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:22,162 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-09-11 20:39:22,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-11 20:39:22,163 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:22,163 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:39:22,164 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:39:22,164 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:22,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash -454476173, now seen corresponding path program 1 times [2024-09-11 20:39:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814427880] [2024-09-11 20:39:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:22,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187508304] [2024-09-11 20:39:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:22,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:22,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:22,235 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 20:39:22,237 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 20:39:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:22,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-11 20:39:22,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:22,420 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 1 [2024-09-11 20:39:22,440 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 20:39:22,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:22,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:22,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:22,611 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 20:39:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:39:22,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:39:22,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:22,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814427880] [2024-09-11 20:39:22,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:22,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187508304] [2024-09-11 20:39:22,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187508304] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:39:22,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:39:22,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-11 20:39:22,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563805952] [2024-09-11 20:39:22,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:39:22,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:39:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:22,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:39:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:39:22,678 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:39:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:22,916 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-09-11 20:39:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:39:22,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-11 20:39:22,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:22,919 INFO L225 Difference]: With dead ends: 42 [2024-09-11 20:39:22,919 INFO L226 Difference]: Without dead ends: 40 [2024-09-11 20:39:22,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:39:22,921 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 14 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:22,923 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 124 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:39:22,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-11 20:39:22,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2024-09-11 20:39:22,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:39:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-11 20:39:22,941 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 20 [2024-09-11 20:39:22,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:22,942 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-11 20:39:22,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-11 20:39:22,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:22,943 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-11 20:39:22,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-11 20:39:22,945 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:22,945 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 20:39:22,962 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:39:23,149 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 20:39:23,150 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:23,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:23,150 INFO L85 PathProgramCache]: Analyzing trace with hash 443267008, now seen corresponding path program 1 times [2024-09-11 20:39:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:23,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299080635] [2024-09-11 20:39:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:23,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [383127901] [2024-09-11 20:39:23,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:23,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:23,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:23,205 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 20:39:23,207 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 20:39:23,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:23,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-11 20:39:23,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:23,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:23,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:23,334 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 20:39:23,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:23,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:39:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:39:23,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:39:23,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:23,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299080635] [2024-09-11 20:39:23,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:23,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383127901] [2024-09-11 20:39:23,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383127901] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:39:23,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:39:23,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-09-11 20:39:23,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576799985] [2024-09-11 20:39:23,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:39:23,598 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-11 20:39:23,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-11 20:39:23,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-11 20:39:23,601 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:39:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:23,908 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-09-11 20:39:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:39:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-11 20:39:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:23,911 INFO L225 Difference]: With dead ends: 48 [2024-09-11 20:39:23,912 INFO L226 Difference]: Without dead ends: 38 [2024-09-11 20:39:23,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:39:23,914 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:23,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 60 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:39:23,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-11 20:39:23,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-11 20:39:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:39:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2024-09-11 20:39:23,932 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 30 [2024-09-11 20:39:23,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:23,933 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2024-09-11 20:39:23,933 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:39:23,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2024-09-11 20:39:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-11 20:39:23,936 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:23,936 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 20:39:23,953 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 20:39:24,140 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 20:39:24,141 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:24,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:24,141 INFO L85 PathProgramCache]: Analyzing trace with hash -746539634, now seen corresponding path program 1 times [2024-09-11 20:39:24,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:24,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820086303] [2024-09-11 20:39:24,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:24,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:24,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308570302] [2024-09-11 20:39:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:24,251 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 20:39:24,253 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 20:39:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:24,372 WARN L260 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-11 20:39:24,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:24,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:24,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:24,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:24,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:24,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:39:24,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2024-09-11 20:39:24,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:24,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:24,765 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 20:39:24,769 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 20:39:24,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:39:24,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:39:25,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820086303] [2024-09-11 20:39:25,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:25,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308570302] [2024-09-11 20:39:25,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308570302] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:39:25,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:39:25,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2024-09-11 20:39:25,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509407447] [2024-09-11 20:39:25,180 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:25,180 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:39:25,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:39:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:39:25,184 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:39:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:25,957 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2024-09-11 20:39:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:39:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2024-09-11 20:39:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:25,960 INFO L225 Difference]: With dead ends: 59 [2024-09-11 20:39:25,960 INFO L226 Difference]: Without dead ends: 55 [2024-09-11 20:39:25,960 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:39:25,961 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:25,961 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 193 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:39:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-11 20:39:25,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2024-09-11 20:39:25,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-11 20:39:25,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2024-09-11 20:39:25,980 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 31 [2024-09-11 20:39:25,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:25,980 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2024-09-11 20:39:25,981 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (10), 7 states have call predecessors, (10), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:39:25,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:25,981 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2024-09-11 20:39:25,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:39:25,982 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:25,982 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 20:39:26,000 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 20:39:26,183 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:26,183 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:26,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:26,183 INFO L85 PathProgramCache]: Analyzing trace with hash 230239702, now seen corresponding path program 1 times [2024-09-11 20:39:26,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:26,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765837794] [2024-09-11 20:39:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:26,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626784203] [2024-09-11 20:39:26,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:26,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:26,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:26,272 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 20:39:26,276 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 20:39:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:26,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-09-11 20:39:26,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:26,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:26,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:26,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:26,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:26,437 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 20:39:26,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:26,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:39:27,477 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 36 treesize of output 13 [2024-09-11 20:39:27,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:27,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-11 20:39:27,575 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 24 treesize of output 12 [2024-09-11 20:39:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 20:39:27,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:29,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765837794] [2024-09-11 20:39:29,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:29,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626784203] [2024-09-11 20:39:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626784203] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:29,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:39:29,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 20:39:29,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040430237] [2024-09-11 20:39:29,072 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:29,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:39:29,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:29,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:39:29,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:39:29,074 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-11 20:39:29,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:29,931 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2024-09-11 20:39:29,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:39:29,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2024-09-11 20:39:29,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:29,934 INFO L225 Difference]: With dead ends: 60 [2024-09-11 20:39:29,937 INFO L226 Difference]: Without dead ends: 50 [2024-09-11 20:39:29,937 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:39:29,938 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:29,938 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-11 20:39:29,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-11 20:39:29,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-11 20:39:29,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (14), 8 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-11 20:39:29,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2024-09-11 20:39:29,960 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 43 [2024-09-11 20:39:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:29,962 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2024-09-11 20:39:29,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 6 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-11 20:39:29,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:29,964 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2024-09-11 20:39:29,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-11 20:39:29,965 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:29,965 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 20:39:29,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:39:30,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:30,166 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:30,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash -587408748, now seen corresponding path program 1 times [2024-09-11 20:39:30,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:30,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700343220] [2024-09-11 20:39:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:30,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:30,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426005745] [2024-09-11 20:39:30,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:30,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:30,202 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 20:39:30,205 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 20:39:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:39:30,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-09-11 20:39:30,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:30,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:30,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:30,373 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 20:39:30,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:30,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:30,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:30,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-09-11 20:39:31,028 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-11 20:39:31,029 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 37 treesize of output 29 [2024-09-11 20:39:31,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:39:31,108 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:39:31,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:31,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:39:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700343220] [2024-09-11 20:39:31,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:39:31,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426005745] [2024-09-11 20:39:31,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426005745] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:39:31,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:39:31,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:39:31,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048129363] [2024-09-11 20:39:31,803 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:39:31,803 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:39:31,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:39:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:39:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:39:31,805 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:39:35,830 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:39:36,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:39:36,479 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2024-09-11 20:39:36,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:39:36,480 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 43 [2024-09-11 20:39:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:39:36,481 INFO L225 Difference]: With dead ends: 62 [2024-09-11 20:39:36,481 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 20:39:36,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:39:36,482 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:39:36,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 92 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 441 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-11 20:39:36,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 20:39:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2024-09-11 20:39:36,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-11 20:39:36,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2024-09-11 20:39:36,503 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 43 [2024-09-11 20:39:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:39:36,503 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2024-09-11 20:39:36,503 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:39:36,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2024-09-11 20:39:36,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:39:36,505 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:39:36,505 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 20:39:36,520 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:39:36,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-11 20:39:36,706 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:39:36,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:39:36,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1603601130, now seen corresponding path program 2 times [2024-09-11 20:39:36,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:39:36,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510400100] [2024-09-11 20:39:36,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:39:36,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:39:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:39:36,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154158501] [2024-09-11 20:39:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:39:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:39:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:39:36,749 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 20:39:36,752 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 20:39:36,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:39:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:39:36,898 WARN L260 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 216 conjuncts are in the unsatisfiable core [2024-09-11 20:39:36,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:39:36,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:36,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:36,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:36,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:36,992 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 20:39:37,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:39:37,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:39:37,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:39:38,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-11 20:39:38,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:39:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:39:38,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:39:41,427 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 88 treesize of output 84 [2024-09-11 20:39:41,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2024-09-11 20:39:41,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2024-09-11 20:39:41,716 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 40 treesize of output 36 [2024-09-11 20:40:11,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:11,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510400100] [2024-09-11 20:40:11,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:11,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154158501] [2024-09-11 20:40:11,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154158501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:11,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:11,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-11 20:40:11,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344109003] [2024-09-11 20:40:11,177 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:11,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 20:40:11,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 20:40:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=959, Unknown=2, NotChecked=0, Total=1056 [2024-09-11 20:40:11,180 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand has 25 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:40:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:14,754 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2024-09-11 20:40:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:40:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 56 [2024-09-11 20:40:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:14,755 INFO L225 Difference]: With dead ends: 64 [2024-09-11 20:40:14,755 INFO L226 Difference]: Without dead ends: 58 [2024-09-11 20:40:14,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=188, Invalid=1790, Unknown=2, NotChecked=0, Total=1980 [2024-09-11 20:40:14,757 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:14,758 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-11 20:40:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-11 20:40:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-11 20:40:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2024-09-11 20:40:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2024-09-11 20:40:14,787 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 56 [2024-09-11 20:40:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:14,789 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2024-09-11 20:40:14,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:40:14,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:14,790 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2024-09-11 20:40:14,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:40:14,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:14,791 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:14,805 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:40:14,991 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:14,992 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:14,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:14,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1384746412, now seen corresponding path program 1 times [2024-09-11 20:40:14,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:14,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744793039] [2024-09-11 20:40:14,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:14,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:15,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:15,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:40:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:15,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:40:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:15,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:40:15,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:16,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:40:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:16,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:40:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:17,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:40:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:17,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:40:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:17,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:40:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-11 20:40:17,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:17,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744793039] [2024-09-11 20:40:17,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744793039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:17,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204272867] [2024-09-11 20:40:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:17,381 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 20:40:17,382 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 20:40:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:40:17,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-11 20:40:17,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:17,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:17,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:17,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:40:18,160 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 14 treesize of output 10 [2024-09-11 20:40:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 20:40:18,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:19,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:40:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 19 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-11 20:40:20,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204272867] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:40:20,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:40:20,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 12] total 33 [2024-09-11 20:40:20,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056487604] [2024-09-11 20:40:20,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:20,011 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 20:40:20,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:20,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 20:40:20,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:40:20,013 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) [2024-09-11 20:40:22,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:22,802 INFO L93 Difference]: Finished difference Result 75 states and 101 transitions. [2024-09-11 20:40:22,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:40:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) Word has length 56 [2024-09-11 20:40:22,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:22,804 INFO L225 Difference]: With dead ends: 75 [2024-09-11 20:40:22,804 INFO L226 Difference]: Without dead ends: 67 [2024-09-11 20:40:22,805 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=274, Invalid=1706, Unknown=0, NotChecked=0, Total=1980 [2024-09-11 20:40:22,806 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:22,806 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 152 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 20:40:22,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-11 20:40:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-11 20:40:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 10 states have call successors, (10), 8 states have call predecessors, (10), 11 states have return successors, (22), 12 states have call predecessors, (22), 9 states have call successors, (22) [2024-09-11 20:40:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2024-09-11 20:40:22,855 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 56 [2024-09-11 20:40:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:22,855 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2024-09-11 20:40:22,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 25 states have (on average 2.2) internal successors, (55), 29 states have internal predecessors, (55), 15 states have call successors, (18), 6 states have call predecessors, (18), 6 states have return successors, (17), 12 states have call predecessors, (17), 14 states have call successors, (17) [2024-09-11 20:40:22,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2024-09-11 20:40:22,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:40:22,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:22,857 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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 20:40:22,873 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:40:23,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:23,058 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:23,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:23,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1457132970, now seen corresponding path program 2 times [2024-09-11 20:40:23,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:23,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923819802] [2024-09-11 20:40:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:23,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2061773143] [2024-09-11 20:40:23,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:40:23,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:23,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:23,085 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 20:40:23,087 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 20:40:23,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:40:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:40:23,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-11 20:40:23,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:23,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:23,270 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 11 [2024-09-11 20:40:23,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:23,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:24,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:40:24,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:25,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923819802] [2024-09-11 20:40:25,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:25,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061773143] [2024-09-11 20:40:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061773143] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:25,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:25,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-11 20:40:25,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858871329] [2024-09-11 20:40:25,806 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:25,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:40:25,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:25,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:40:25,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:40:25,807 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:40:26,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:26,841 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2024-09-11 20:40:26,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:40:26,842 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2024-09-11 20:40:26,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:26,843 INFO L225 Difference]: With dead ends: 70 [2024-09-11 20:40:26,843 INFO L226 Difference]: Without dead ends: 64 [2024-09-11 20:40:26,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:40:26,844 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:26,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-11 20:40:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-11 20:40:26,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2024-09-11 20:40:26,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 10 states have call successors, (10), 8 states have call predecessors, (10), 12 states have return successors, (24), 13 states have call predecessors, (24), 9 states have call successors, (24) [2024-09-11 20:40:26,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2024-09-11 20:40:26,866 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 56 [2024-09-11 20:40:26,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:26,866 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2024-09-11 20:40:26,866 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 13 states have internal predecessors, (26), 7 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:40:26,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2024-09-11 20:40:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:40:26,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:26,868 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:26,881 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 20:40:27,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:27,069 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:27,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:27,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1628557930, now seen corresponding path program 3 times [2024-09-11 20:40:27,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:27,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454853086] [2024-09-11 20:40:27,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:27,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656228580] [2024-09-11 20:40:27,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:40:27,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:27,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:27,101 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 20:40:27,102 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 20:40:27,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:40:27,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:40:27,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-09-11 20:40:27,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:27,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:27,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:27,422 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 20:40:27,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:27,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:27,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:28,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-11 20:40:28,870 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 24 treesize of output 20 [2024-09-11 20:40:30,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:30,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-09-11 20:40:30,139 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 20:40:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-11 20:40:30,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:39,059 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (let ((.cse1 (select .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|)) (.cse0 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_23| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_16|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|) (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_30|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_30|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_23|))))))) (and (or .cse0 (= (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|) (select (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|) |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) .cse1 2))) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_25| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_23| Int)) (let ((.cse2 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_16|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_14|)) (.cse3 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_25|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_23|))) (or (= .cse2 (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_30|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_30|) (* (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|) .cse3))) (not (= .cse2 (+ (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse4 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| (+ .cse1 2))) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_30|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_30|) (* .cse3 (select (select |c_old(#memory_int#5)| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_14|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_14|)))))))) (or .cse0 (= 2 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|)))))) is different from false [2024-09-11 20:40:39,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454853086] [2024-09-11 20:40:39,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:39,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656228580] [2024-09-11 20:40:39,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656228580] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:39,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:39,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:40:39,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368651485] [2024-09-11 20:40:39,880 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:39,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:40:39,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:39,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:40:39,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=904, Unknown=1, NotChecked=60, Total=1056 [2024-09-11 20:40:39,882 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 26 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 10 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-11 20:40:42,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:42,829 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2024-09-11 20:40:42,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:40:42,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 10 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 69 [2024-09-11 20:40:42,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:42,831 INFO L225 Difference]: With dead ends: 72 [2024-09-11 20:40:42,831 INFO L226 Difference]: Without dead ends: 66 [2024-09-11 20:40:42,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=195, Invalid=1878, Unknown=1, NotChecked=88, Total=2162 [2024-09-11 20:40:42,832 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:42,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 129 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 20:40:42,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-11 20:40:42,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-11 20:40:42,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 10 states have call successors, (10), 8 states have call predecessors, (10), 13 states have return successors, (26), 14 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-11 20:40:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-11 20:40:42,859 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 69 [2024-09-11 20:40:42,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:42,859 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-11 20:40:42,860 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.05) internal successors, (41), 23 states have internal predecessors, (41), 10 states have call successors, (11), 3 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-11 20:40:42,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-11 20:40:42,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:40:42,868 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:42,868 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:42,882 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 20:40:43,069 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-11 20:40:43,069 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:43,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:43,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1986243052, now seen corresponding path program 4 times [2024-09-11 20:40:43,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:43,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231084043] [2024-09-11 20:40:43,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:43,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:43,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:43,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789895050] [2024-09-11 20:40:43,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:40:43,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:43,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:43,113 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 20:40:43,114 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 20:40:43,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:40:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:40:43,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-09-11 20:40:43,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:43,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:43,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:43,320 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 20:40:43,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:44,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 10 proven. 39 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2024-09-11 20:40:45,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:46,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:40:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231084043] [2024-09-11 20:40:46,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:40:46,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789895050] [2024-09-11 20:40:46,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789895050] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:40:46,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:40:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-11 20:40:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948554833] [2024-09-11 20:40:46,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:40:46,605 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:40:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:40:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:40:46,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:40:46,605 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:40:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:40:47,824 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2024-09-11 20:40:47,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 20:40:47,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) Word has length 82 [2024-09-11 20:40:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:40:47,826 INFO L225 Difference]: With dead ends: 74 [2024-09-11 20:40:47,826 INFO L226 Difference]: Without dead ends: 68 [2024-09-11 20:40:47,826 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:40:47,827 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:40:47,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 130 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-11 20:40:47,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-11 20:40:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-09-11 20:40:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 14 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-11 20:40:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-11 20:40:47,849 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 82 [2024-09-11 20:40:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:40:47,849 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-11 20:40:47,849 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (9), 8 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-11 20:40:47,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:47,850 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-11 20:40:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-11 20:40:47,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:40:47,851 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:40:47,865 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 20:40:48,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-11 20:40:48,055 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:40:48,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:40:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1675987688, now seen corresponding path program 2 times [2024-09-11 20:40:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:40:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365187992] [2024-09-11 20:40:48,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:40:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:40:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:40:48,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110987575] [2024-09-11 20:40:48,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:40:48,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:40:48,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:40:48,080 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 20:40:48,086 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 20:40:48,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:40:48,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:40:48,270 WARN L260 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 207 conjuncts are in the unsatisfiable core [2024-09-11 20:40:48,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:40:48,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:48,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:40:48,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:40:48,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:48,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:48,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:40:49,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:40:50,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:50,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-11 20:40:50,485 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-11 20:40:50,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:40:55,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 60 [2024-09-11 20:40:55,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-11 20:40:55,823 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 56 treesize of output 52 [2024-09-11 20:40:59,920 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base|))) (let ((.cse1 (select (select |c_#memory_int#1| |c_func_to_recursive_line_31_to_42_0_#in~x2.base|) |c_func_to_recursive_line_31_to_42_0_#in~x2.offset|)) (.cse2 (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_31| Int)) (= (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20|) (+ (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_31|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_29|) (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_20|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_44|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_44|))))) (.cse3 (select .cse6 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset|)) (.cse0 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base|))) (and (or (= (+ (select .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset|) 1) .cse1) .cse2) (or (< (select (select |c_#memory_int#4| |c_func_to_recursive_line_31_to_42_0_#in~x1.base|) |c_func_to_recursive_line_31_to_42_0_#in~x1.offset|) (+ (* .cse1 .cse3) .cse1 1)) .cse2) (or .cse2 (= (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_31_to_42_0_#in~y3.base|) |c_func_to_recursive_line_31_to_42_0_#in~y3.offset|) 1)) (forall ((|v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_44| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_20| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_29| Int) (|v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_31| Int)) (let ((.cse4 (select (select |c_#memory_int#4| |v_func_to_recursive_line_31_to_42_0_#in~x1.base_BEFORE_CALL_22|) |v_func_to_recursive_line_31_to_42_0_#in~x1.offset_BEFORE_CALL_20|)) (.cse5 (select (select |c_#memory_int#1| |v_func_to_recursive_line_31_to_42_0_#in~x2.base_BEFORE_CALL_31|) |v_func_to_recursive_line_31_to_42_0_#in~x2.offset_BEFORE_CALL_29|))) (or (= .cse4 (+ (* .cse5 (select (select |c_#memory_int#5| |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_20|)) (select (select |c_#memory_int#3| |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_44|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_44|))) (not (= .cse4 (+ (* .cse5 (select (select (store |c_old(#memory_int#5)| |c_func_to_recursive_line_31_to_42_0_#in~y1.base| (store .cse6 |c_func_to_recursive_line_31_to_42_0_#in~y1.offset| (+ .cse3 1))) |v_func_to_recursive_line_31_to_42_0_#in~y1.base_BEFORE_CALL_20|) |v_func_to_recursive_line_31_to_42_0_#in~y1.offset_BEFORE_CALL_20|)) (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_31_to_42_0_#in~y2.base| (store .cse0 |c_func_to_recursive_line_31_to_42_0_#in~y2.offset| 0)) |v_func_to_recursive_line_31_to_42_0_#in~y2.base_BEFORE_CALL_44|) |v_func_to_recursive_line_31_to_42_0_#in~y2.offset_BEFORE_CALL_44|)))))))))) is different from false [2024-09-11 20:41:01,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365187992] [2024-09-11 20:41:01,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:41:01,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110987575] [2024-09-11 20:41:01,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110987575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:01,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:41:01,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:41:01,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168689453] [2024-09-11 20:41:01,021 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:01,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:41:01,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:41:01,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=685, Unknown=1, NotChecked=52, Total=812 [2024-09-11 20:41:01,022 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:41:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:03,798 INFO L93 Difference]: Finished difference Result 76 states and 93 transitions. [2024-09-11 20:41:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:41:03,799 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2024-09-11 20:41:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:03,800 INFO L225 Difference]: With dead ends: 76 [2024-09-11 20:41:03,800 INFO L226 Difference]: Without dead ends: 70 [2024-09-11 20:41:03,801 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=138, Invalid=1271, Unknown=1, NotChecked=72, Total=1482 [2024-09-11 20:41:03,802 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:03,802 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 115 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 20:41:03,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-11 20:41:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2024-09-11 20:41:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 10 states have call successors, (10), 8 states have call predecessors, (10), 14 states have return successors, (28), 15 states have call predecessors, (28), 9 states have call successors, (28) [2024-09-11 20:41:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-11 20:41:03,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 56 [2024-09-11 20:41:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:03,846 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-11 20:41:03,846 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.875) internal successors, (30), 17 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-11 20:41:03,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-11 20:41:03,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-11 20:41:03,847 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:03,847 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:03,864 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-11 20:41:04,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:04,051 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:04,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:04,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1723148096, now seen corresponding path program 5 times [2024-09-11 20:41:04,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:04,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59800593] [2024-09-11 20:41:04,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:04,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:41:04,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1654095384] [2024-09-11 20:41:04,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:41:04,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:04,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:04,090 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 20:41:04,094 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 20:41:04,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-11 20:41:04,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:41:04,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-09-11 20:41:04,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:04,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:04,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:41:04,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:04,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:06,233 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 20:41:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 14 proven. 67 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 20:41:06,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:41:08,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:08,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59800593] [2024-09-11 20:41:08,783 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:41:08,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654095384] [2024-09-11 20:41:08,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654095384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:08,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:41:08,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-11 20:41:08,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083222227] [2024-09-11 20:41:08,783 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:08,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:41:08,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:08,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:41:08,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:41:08,785 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:41:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:10,469 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-11 20:41:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:41:10,470 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) Word has length 95 [2024-09-11 20:41:10,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:10,471 INFO L225 Difference]: With dead ends: 78 [2024-09-11 20:41:10,471 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 20:41:10,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:41:10,472 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:10,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 153 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-11 20:41:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 20:41:10,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2024-09-11 20:41:10,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 15 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 20:41:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2024-09-11 20:41:10,508 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 95 [2024-09-11 20:41:10,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:10,508 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2024-09-11 20:41:10,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 18 states have internal predecessors, (32), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (11), 9 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-11 20:41:10,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:10,509 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2024-09-11 20:41:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:41:10,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:10,510 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:10,529 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 20:41:10,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-11 20:41:10,711 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:10,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:10,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1762571436, now seen corresponding path program 3 times [2024-09-11 20:41:10,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:10,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776834037] [2024-09-11 20:41:10,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:10,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:41:10,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637583639] [2024-09-11 20:41:10,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:41:10,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:10,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:10,741 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 20:41:10,742 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 20:41:10,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:41:10,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:41:10,986 WARN L260 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 255 conjuncts are in the unsatisfiable core [2024-09-11 20:41:10,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:10,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:11,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:11,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:11,114 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 20:41:11,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:11,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:12,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2024-09-11 20:41:13,813 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 36 treesize of output 13 [2024-09-11 20:41:13,847 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 20:41:13,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 22 [2024-09-11 20:41:13,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-11 20:41:13,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-11 20:41:14,172 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-11 20:41:14,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:41:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776834037] [2024-09-11 20:41:19,475 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:41:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637583639] [2024-09-11 20:41:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637583639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:19,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:41:19,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:41:19,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001130285] [2024-09-11 20:41:19,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:19,476 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:41:19,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:19,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:41:19,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:41:19,477 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:41:21,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:21,996 INFO L93 Difference]: Finished difference Result 80 states and 99 transitions. [2024-09-11 20:41:21,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:41:21,998 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 69 [2024-09-11 20:41:21,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:21,999 INFO L225 Difference]: With dead ends: 80 [2024-09-11 20:41:21,999 INFO L226 Difference]: Without dead ends: 74 [2024-09-11 20:41:22,000 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 20:41:22,000 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:22,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 150 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-11 20:41:22,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-11 20:41:22,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2024-09-11 20:41:22,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 10 states have call successors, (10), 8 states have call predecessors, (10), 15 states have return successors, (30), 16 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-11 20:41:22,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2024-09-11 20:41:22,028 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 69 [2024-09-11 20:41:22,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:22,029 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2024-09-11 20:41:22,029 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 18 states have internal predecessors, (30), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:41:22,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:22,029 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2024-09-11 20:41:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:41:22,030 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:22,030 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:22,049 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 20:41:22,230 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-11 20:41:22,231 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:22,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash 678304236, now seen corresponding path program 3 times [2024-09-11 20:41:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:22,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484935254] [2024-09-11 20:41:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:22,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:41:22,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [294064162] [2024-09-11 20:41:22,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:41:22,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:22,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:22,260 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 20:41:22,261 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 20:41:22,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:41:22,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:41:22,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 195 conjuncts are in the unsatisfiable core [2024-09-11 20:41:22,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:22,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:22,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:22,667 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 20:41:22,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:22,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:23,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:41:23,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:24,312 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 20:41:24,322 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 20:41:24,704 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 15 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 20:41:24,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:41:32,646 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 86 treesize of output 82 [2024-09-11 20:41:32,681 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 86 treesize of output 82 [2024-09-11 20:41:32,722 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 86 treesize of output 82 [2024-09-11 20:41:32,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484935254] [2024-09-11 20:41:32,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:41:32,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294064162] [2024-09-11 20:41:32,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294064162] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:32,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:41:32,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-11 20:41:32,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319089555] [2024-09-11 20:41:32,949 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:32,949 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:41:32,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:32,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:41:32,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=789, Unknown=1, NotChecked=0, Total=870 [2024-09-11 20:41:32,950 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:41:34,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:34,772 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-09-11 20:41:34,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:41:34,773 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 69 [2024-09-11 20:41:34,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:34,773 INFO L225 Difference]: With dead ends: 78 [2024-09-11 20:41:34,774 INFO L226 Difference]: Without dead ends: 72 [2024-09-11 20:41:34,774 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=153, Invalid=1406, Unknown=1, NotChecked=0, Total=1560 [2024-09-11 20:41:34,775 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:34,775 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 20:41:34,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-11 20:41:34,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-11 20:41:34,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 10 states have call successors, (10), 8 states have call predecessors, (10), 16 states have return successors, (32), 17 states have call predecessors, (32), 9 states have call successors, (32) [2024-09-11 20:41:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-09-11 20:41:34,802 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 69 [2024-09-11 20:41:34,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:34,802 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-09-11 20:41:34,802 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 20 states have internal predecessors, (35), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:41:34,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-09-11 20:41:34,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:41:34,803 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:34,803 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:34,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-11 20:41:35,004 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-11 20:41:35,004 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:35,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:35,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1688390358, now seen corresponding path program 4 times [2024-09-11 20:41:35,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:35,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687590288] [2024-09-11 20:41:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:35,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:35,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:41:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:35,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:41:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:35,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:41:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:36,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:36,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:36,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:36,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:37,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:37,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:37,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:37,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:37,207 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-11 20:41:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687590288] [2024-09-11 20:41:37,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687590288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:37,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605741459] [2024-09-11 20:41:37,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:41:37,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:37,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:37,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:41:37,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:41:37,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:41:37,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:41:37,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-11 20:41:37,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:37,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:37,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 9 [2024-09-11 20:41:38,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:41:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-09-11 20:41:38,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:41:38,937 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 20:41:39,483 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 20:41:40,191 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 20:41:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 40 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:41:40,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605741459] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:41:40,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:41:40,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 16] total 38 [2024-09-11 20:41:40,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929297186] [2024-09-11 20:41:40,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:40,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 20:41:40,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:40,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 20:41:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:41:40,514 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 33 states have internal predecessors, (66), 19 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (21), 16 states have call predecessors, (21), 18 states have call successors, (21) [2024-09-11 20:41:45,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:41:45,069 INFO L93 Difference]: Finished difference Result 191 states and 272 transitions. [2024-09-11 20:41:45,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-11 20:41:45,070 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 33 states have internal predecessors, (66), 19 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (21), 16 states have call predecessors, (21), 18 states have call successors, (21) Word has length 69 [2024-09-11 20:41:45,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:41:45,071 INFO L225 Difference]: With dead ends: 191 [2024-09-11 20:41:45,071 INFO L226 Difference]: Without dead ends: 129 [2024-09-11 20:41:45,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 155 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=954, Invalid=4448, Unknown=0, NotChecked=0, Total=5402 [2024-09-11 20:41:45,073 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-11 20:41:45,073 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 248 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-11 20:41:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-11 20:41:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 90. [2024-09-11 20:41:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 57 states have (on average 1.105263157894737) internal successors, (63), 60 states have internal predecessors, (63), 14 states have call successors, (14), 10 states have call predecessors, (14), 18 states have return successors, (31), 19 states have call predecessors, (31), 13 states have call successors, (31) [2024-09-11 20:41:45,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 108 transitions. [2024-09-11 20:41:45,112 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 108 transitions. Word has length 69 [2024-09-11 20:41:45,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:41:45,113 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 108 transitions. [2024-09-11 20:41:45,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 33 states have internal predecessors, (66), 19 states have call successors, (22), 7 states have call predecessors, (22), 8 states have return successors, (21), 16 states have call predecessors, (21), 18 states have call successors, (21) [2024-09-11 20:41:45,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:45,113 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 108 transitions. [2024-09-11 20:41:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:41:45,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:41:45,114 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:41:45,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-11 20:41:45,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-11 20:41:45,315 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:41:45,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:41:45,315 INFO L85 PathProgramCache]: Analyzing trace with hash 47081006, now seen corresponding path program 5 times [2024-09-11 20:41:45,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:41:45,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554988211] [2024-09-11 20:41:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:41:45,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:41:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:45,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:41:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:45,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-11 20:41:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:45,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-11 20:41:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:46,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:46,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:47,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:47,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:48,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:48,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:49,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:49,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:41:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:49,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:41:49,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:41:49,827 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-11 20:41:49,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:41:49,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554988211] [2024-09-11 20:41:49,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554988211] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:41:49,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792409870] [2024-09-11 20:41:49,827 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:41:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:41:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:41:49,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:41:49,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 20:41:50,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-11 20:41:50,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:41:50,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 105 conjuncts are in the unsatisfiable core [2024-09-11 20:41:50,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:41:50,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:41:50,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:41:50,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:41:51,172 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 14 treesize of output 10 [2024-09-11 20:41:51,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 23 proven. 37 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2024-09-11 20:41:51,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:41:52,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:41:53,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:41:53,571 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 14 treesize of output 10 [2024-09-11 20:41:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 70 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-11 20:41:55,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792409870] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:41:55,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:41:55,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14, 20] total 52 [2024-09-11 20:41:55,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577184492] [2024-09-11 20:41:55,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:41:55,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-11 20:41:55,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:41:55,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-11 20:41:55,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 20:41:55,017 INFO L87 Difference]: Start difference. First operand 90 states and 108 transitions. Second operand has 52 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 46 states have internal predecessors, (83), 26 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (29), 21 states have call predecessors, (29), 25 states have call successors, (29) [2024-09-11 20:42:02,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:02,876 INFO L93 Difference]: Finished difference Result 132 states and 163 transitions. [2024-09-11 20:42:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-11 20:42:02,877 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 46 states have internal predecessors, (83), 26 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (29), 21 states have call predecessors, (29), 25 states have call successors, (29) Word has length 82 [2024-09-11 20:42:02,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:02,878 INFO L225 Difference]: With dead ends: 132 [2024-09-11 20:42:02,878 INFO L226 Difference]: Without dead ends: 120 [2024-09-11 20:42:02,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1862 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1054, Invalid=7688, Unknown=0, NotChecked=0, Total=8742 [2024-09-11 20:42:02,880 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:02,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 372 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-11 20:42:02,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-11 20:42:02,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2024-09-11 20:42:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 62 states have (on average 1.096774193548387) internal successors, (68), 65 states have internal predecessors, (68), 14 states have call successors, (14), 10 states have call predecessors, (14), 23 states have return successors, (39), 24 states have call predecessors, (39), 13 states have call successors, (39) [2024-09-11 20:42:02,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2024-09-11 20:42:02,920 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 82 [2024-09-11 20:42:02,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:02,921 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2024-09-11 20:42:02,921 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 46 states have internal predecessors, (83), 26 states have call successors, (29), 8 states have call predecessors, (29), 10 states have return successors, (29), 21 states have call predecessors, (29), 25 states have call successors, (29) [2024-09-11 20:42:02,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:02,921 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2024-09-11 20:42:02,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:42:02,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:02,922 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:02,935 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 20:42:03,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:03,122 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:03,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:03,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1822403864, now seen corresponding path program 6 times [2024-09-11 20:42:03,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:03,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985377787] [2024-09-11 20:42:03,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:03,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:03,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825351895] [2024-09-11 20:42:03,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:42:03,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:03,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:03,145 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:03,146 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 20:42:03,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-11 20:42:03,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:42:03,381 WARN L260 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 248 conjuncts are in the unsatisfiable core [2024-09-11 20:42:03,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:03,402 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 20:42:03,409 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 20:42:03,493 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 20:42:03,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:42:04,169 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 20:42:04,188 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 20:42:05,747 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 20:42:06,220 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 20:42:06,227 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 20:42:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-11 20:42:06,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:12,067 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 76 treesize of output 72 [2024-09-11 20:42:12,074 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 122 treesize of output 114 [2024-09-11 20:42:12,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:12,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985377787] [2024-09-11 20:42:12,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:12,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825351895] [2024-09-11 20:42:12,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825351895] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:12,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:12,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-11 20:42:12,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094890412] [2024-09-11 20:42:12,594 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:12,594 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:42:12,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:12,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:42:12,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=842, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:42:12,595 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 26 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-11 20:42:15,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:15,125 INFO L93 Difference]: Finished difference Result 114 states and 137 transitions. [2024-09-11 20:42:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:42:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 69 [2024-09-11 20:42:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:15,127 INFO L225 Difference]: With dead ends: 114 [2024-09-11 20:42:15,127 INFO L226 Difference]: Without dead ends: 108 [2024-09-11 20:42:15,128 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=187, Invalid=1705, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 20:42:15,128 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:15,128 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 158 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-11 20:42:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-11 20:42:15,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2024-09-11 20:42:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.09375) internal successors, (70), 67 states have internal predecessors, (70), 14 states have call successors, (14), 10 states have call predecessors, (14), 25 states have return successors, (42), 26 states have call predecessors, (42), 13 states have call successors, (42) [2024-09-11 20:42:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2024-09-11 20:42:15,175 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 69 [2024-09-11 20:42:15,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:15,176 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2024-09-11 20:42:15,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 1.85) internal successors, (37), 21 states have internal predecessors, (37), 9 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-11 20:42:15,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2024-09-11 20:42:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-11 20:42:15,177 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:15,177 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:15,192 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-11 20:42:15,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-11 20:42:15,378 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:15,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:15,379 INFO L85 PathProgramCache]: Analyzing trace with hash -2090738942, now seen corresponding path program 7 times [2024-09-11 20:42:15,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:15,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357584520] [2024-09-11 20:42:15,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:15,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:15,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580761803] [2024-09-11 20:42:15,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:42:15,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:15,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:15,409 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:15,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 20:42:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:42:15,704 WARN L260 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 343 conjuncts are in the unsatisfiable core [2024-09-11 20:42:15,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:15,715 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 20:42:15,719 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 20:42:15,829 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 20:42:15,835 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 20:42:15,846 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 20:42:15,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:42:17,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:42:19,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2024-09-11 20:42:19,178 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 33 treesize of output 25 [2024-09-11 20:42:22,070 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 36 treesize of output 13 [2024-09-11 20:42:22,081 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 20:42:22,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-11 20:42:22,313 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 24 treesize of output 12 [2024-09-11 20:42:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 12 proven. 112 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-11 20:42:22,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:30,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:30,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357584520] [2024-09-11 20:42:30,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:30,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580761803] [2024-09-11 20:42:30,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580761803] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:30,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:30,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2024-09-11 20:42:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030639178] [2024-09-11 20:42:30,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:30,144 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 20:42:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 20:42:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1477, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 20:42:30,145 INFO L87 Difference]: Start difference. First operand 104 states and 126 transitions. Second operand has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-11 20:42:34,175 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 20:42:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:39,384 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2024-09-11 20:42:39,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-11 20:42:39,384 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 95 [2024-09-11 20:42:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:39,386 INFO L225 Difference]: With dead ends: 120 [2024-09-11 20:42:39,386 INFO L226 Difference]: Without dead ends: 114 [2024-09-11 20:42:39,387 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2024-09-11 20:42:39,387 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:39,387 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 226 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1016 Invalid, 1 Unknown, 0 Unchecked, 7.1s Time] [2024-09-11 20:42:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-11 20:42:39,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2024-09-11 20:42:39,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 69 states have internal predecessors, (72), 14 states have call successors, (14), 10 states have call predecessors, (14), 27 states have return successors, (44), 28 states have call predecessors, (44), 13 states have call successors, (44) [2024-09-11 20:42:39,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 130 transitions. [2024-09-11 20:42:39,439 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 130 transitions. Word has length 95 [2024-09-11 20:42:39,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:39,440 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 130 transitions. [2024-09-11 20:42:39,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 30 states have (on average 1.5) internal successors, (45), 33 states have internal predecessors, (45), 12 states have call successors, (12), 4 states have call predecessors, (12), 9 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2024-09-11 20:42:39,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:39,440 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 130 transitions. [2024-09-11 20:42:39,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:42:39,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:39,441 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:39,459 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:39,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:39,642 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:39,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:39,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1235189908, now seen corresponding path program 4 times [2024-09-11 20:42:39,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:39,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045850266] [2024-09-11 20:42:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:39,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:39,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044920456] [2024-09-11 20:42:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:42:39,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:39,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:39,671 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:39,677 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 20:42:39,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:42:39,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:42:39,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 215 conjuncts are in the unsatisfiable core [2024-09-11 20:42:39,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:39,990 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 20:42:39,997 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 20:42:40,005 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 20:42:40,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:42:40,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:42:41,182 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 20:42:41,856 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 20:42:41,874 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 20:42:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 20:42:42,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:42:44,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2024-09-11 20:42:46,559 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 86 treesize of output 82 [2024-09-11 20:42:46,608 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 86 treesize of output 82 [2024-09-11 20:42:46,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:42:46,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045850266] [2024-09-11 20:42:46,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:42:46,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044920456] [2024-09-11 20:42:46,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044920456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:42:46,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:42:46,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-11 20:42:46,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900952977] [2024-09-11 20:42:46,858 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:42:46,858 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:42:46,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:42:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:42:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:42:46,859 INFO L87 Difference]: Start difference. First operand 108 states and 130 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:42:48,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:42:48,567 INFO L93 Difference]: Finished difference Result 116 states and 139 transitions. [2024-09-11 20:42:48,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:42:48,568 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2024-09-11 20:42:48,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:42:48,569 INFO L225 Difference]: With dead ends: 116 [2024-09-11 20:42:48,569 INFO L226 Difference]: Without dead ends: 110 [2024-09-11 20:42:48,570 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:42:48,570 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 17 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:42:48,570 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 154 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-11 20:42:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-11 20:42:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-09-11 20:42:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 70 states have internal predecessors, (73), 14 states have call successors, (14), 10 states have call predecessors, (14), 28 states have return successors, (45), 29 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-11 20:42:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2024-09-11 20:42:48,627 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 82 [2024-09-11 20:42:48,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:42:48,627 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2024-09-11 20:42:48,628 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:42:48,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:48,628 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2024-09-11 20:42:48,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:42:48,628 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:42:48,629 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:42:48,644 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-11 20:42:48,829 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:48,829 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:42:48,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:42:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1924203438, now seen corresponding path program 8 times [2024-09-11 20:42:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:42:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146088970] [2024-09-11 20:42:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:42:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:42:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:42:48,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969597093] [2024-09-11 20:42:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:42:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:42:48,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:42:48,864 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:42:48,865 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 20:42:49,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:42:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:42:49,204 WARN L260 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 324 conjuncts are in the unsatisfiable core [2024-09-11 20:42:49,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:42:49,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-11 20:42:49,218 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 20:42:49,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-11 20:42:49,337 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 20:42:49,346 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 20:42:49,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:42:52,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:42:54,675 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 36 treesize of output 13 [2024-09-11 20:42:54,694 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 20:42:54,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-09-11 20:42:54,848 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 24 treesize of output 12 [2024-09-11 20:42:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 22 proven. 50 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-11 20:42:55,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:01,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:01,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146088970] [2024-09-11 20:43:01,925 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:01,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969597093] [2024-09-11 20:43:01,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969597093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:01,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:01,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2024-09-11 20:43:01,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901146680] [2024-09-11 20:43:01,926 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:01,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:43:01,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:01,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:43:01,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:43:01,927 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 30 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:43:06,014 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 20:43:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:10,191 INFO L93 Difference]: Finished difference Result 128 states and 153 transitions. [2024-09-11 20:43:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-11 20:43:10,192 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 82 [2024-09-11 20:43:10,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:10,193 INFO L225 Difference]: With dead ends: 128 [2024-09-11 20:43:10,193 INFO L226 Difference]: Without dead ends: 122 [2024-09-11 20:43:10,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 10 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=204, Invalid=2148, Unknown=0, NotChecked=0, Total=2352 [2024-09-11 20:43:10,194 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:10,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 170 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 860 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2024-09-11 20:43:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-11 20:43:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 110. [2024-09-11 20:43:10,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 70 states have internal predecessors, (73), 14 states have call successors, (14), 10 states have call predecessors, (14), 28 states have return successors, (45), 29 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-11 20:43:10,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2024-09-11 20:43:10,248 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 82 [2024-09-11 20:43:10,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:10,248 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2024-09-11 20:43:10,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 25 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-11 20:43:10,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2024-09-11 20:43:10,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:43:10,249 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:10,250 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:10,263 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-11 20:43:10,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-11 20:43:10,450 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:10,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:10,450 INFO L85 PathProgramCache]: Analyzing trace with hash -14958608, now seen corresponding path program 9 times [2024-09-11 20:43:10,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:10,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371525508] [2024-09-11 20:43:10,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:10,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:10,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [516563503] [2024-09-11 20:43:10,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:43:10,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:10,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:10,482 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:10,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 20:43:10,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-11 20:43:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:10,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 262 conjuncts are in the unsatisfiable core [2024-09-11 20:43:10,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:11,003 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 20:43:11,012 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 20:43:11,089 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 20:43:11,096 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 20:43:11,106 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 20:43:11,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:43:12,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:43:12,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:43:13,637 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 20:43:13,648 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 20:43:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 14 proven. 45 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-11 20:43:13,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:43:20,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:43:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371525508] [2024-09-11 20:43:20,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-11 20:43:20,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516563503] [2024-09-11 20:43:20,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516563503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:43:20,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:43:20,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-11 20:43:20,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106248589] [2024-09-11 20:43:20,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-11 20:43:20,675 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:43:20,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:43:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:43:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:43:20,676 INFO L87 Difference]: Start difference. First operand 110 states and 132 transitions. Second operand has 24 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-11 20:43:23,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:43:23,122 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2024-09-11 20:43:23,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:43:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) Word has length 82 [2024-09-11 20:43:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:43:23,124 INFO L225 Difference]: With dead ends: 126 [2024-09-11 20:43:23,124 INFO L226 Difference]: Without dead ends: 120 [2024-09-11 20:43:23,125 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=131, Invalid=1429, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 20:43:23,125 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:43:23,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 153 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-11 20:43:23,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-11 20:43:23,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 110. [2024-09-11 20:43:23,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 70 states have internal predecessors, (73), 14 states have call successors, (14), 10 states have call predecessors, (14), 28 states have return successors, (45), 29 states have call predecessors, (45), 13 states have call successors, (45) [2024-09-11 20:43:23,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 132 transitions. [2024-09-11 20:43:23,199 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 132 transitions. Word has length 82 [2024-09-11 20:43:23,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:43:23,199 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 132 transitions. [2024-09-11 20:43:23,199 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 21 states have internal predecessors, (34), 8 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 8 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-11 20:43:23,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:23,200 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 132 transitions. [2024-09-11 20:43:23,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-11 20:43:23,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:43:23,201 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:43:23,219 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-11 20:43:23,401 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:23,401 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:43:23,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:43:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1326711530, now seen corresponding path program 10 times [2024-09-11 20:43:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:43:23,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537295781] [2024-09-11 20:43:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:43:23,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:43:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-11 20:43:23,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534232666] [2024-09-11 20:43:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:43:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:43:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:43:23,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:43:23,432 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-11 20:43:23,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:43:23,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:43:23,727 WARN L260 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 309 conjuncts are in the unsatisfiable core [2024-09-11 20:43:23,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:43:23,736 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 20:43:23,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:43:23,750 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 20:43:23,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-11 20:43:24,495 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 24 treesize of output 20 [2024-09-11 20:43:24,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2024-09-11 20:43:25,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-09-11 20:43:27,309 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 20:43:27,318 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 20:43:27,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2024-09-11 20:43:27,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2024-09-11 20:43:27,756 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-11 20:43:27,757 INFO L327 TraceCheckSpWp]: Computing backward predicates...