./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --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 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:53:16,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:53:16,095 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:53:16,102 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:53:16,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:53:16,133 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:53:16,133 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:53:16,133 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:53:16,136 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:53:16,137 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:53:16,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:53:16,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:53:16,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:53:16,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:53:16,138 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:53:16,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:53:16,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:53:16,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:53:16,140 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:53:16,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:53:16,140 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:53:16,145 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:53:16,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:53:16,146 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:53:16,146 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:53:16,146 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:53:16,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:53:16,147 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:53:16,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:53:16,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:53:16,148 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:53:16,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:53:16,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:16,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:53:16,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:53:16,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:53:16,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:53:16,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:53:16,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:53:16,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:53:16,151 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:53:16,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:53:16,152 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:53:16,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:53:16,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:53:16,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:53:16,514 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:53:16,515 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:53:16,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-15 19:53:18,191 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:53:18,406 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:53:18,407 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-15 19:53:18,414 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/38c7045a2/abec11e5f7aa42499e1d73e0eba5fc37/FLAG0aa1c91ae [2024-09-15 19:53:18,427 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/38c7045a2/abec11e5f7aa42499e1d73e0eba5fc37 [2024-09-15 19:53:18,430 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:53:18,431 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:53:18,432 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:18,433 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:53:18,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:53:18,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8a89b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18, skipping insertion in model container [2024-09-15 19:53:18,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,467 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:53:18,645 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-09-15 19:53:18,670 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:18,687 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:53:18,707 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i[1567,1580] [2024-09-15 19:53:18,724 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:53:18,742 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:53:18,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18 WrapperNode [2024-09-15 19:53:18,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:53:18,745 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:18,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:53:18,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:53:18,752 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,764 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,775 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:53:18,776 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:53:18,777 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:53:18,777 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:53:18,777 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:53:18,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,789 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,792 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,817 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 11, 7, 3, 4, 7]. 32 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0, 0]. The 10 writes are split as follows [0, 3, 2, 1, 1, 3]. [2024-09-15 19:53:18,818 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,818 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,831 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,835 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,836 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:53:18,842 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:53:18,846 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:53:18,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:53:18,847 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (1/1) ... [2024-09-15 19:53:18,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:53:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:18,881 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:53:18,887 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 [2024-09-15 19:53:18,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:53:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-15 19:53:18,942 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-15 19:53:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:53:18,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:53:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:53:18,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-15 19:53:18,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-15 19:53:18,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-15 19:53:18,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-15 19:53:18,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-15 19:53:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:53:18,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:53:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-15 19:53:18,946 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-15 19:53:18,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:53:18,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:53:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-15 19:53:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-15 19:53:18,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-15 19:53:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-15 19:53:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-15 19:53:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-15 19:53:18,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:53:18,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:53:18,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-15 19:53:19,049 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:53:19,051 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:53:19,296 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-15 19:53:19,297 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:53:19,328 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:53:19,328 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:53:19,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:19 BoogieIcfgContainer [2024-09-15 19:53:19,329 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:53:19,331 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:53:19,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:53:19,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:53:19,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:53:18" (1/3) ... [2024-09-15 19:53:19,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad13d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:19, skipping insertion in model container [2024-09-15 19:53:19,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:53:18" (2/3) ... [2024-09-15 19:53:19,342 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ad13d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:53:19, skipping insertion in model container [2024-09-15 19:53:19,342 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:53:19" (3/3) ... [2024-09-15 19:53:19,344 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-15 19:53:19,359 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:53:19,359 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:53:19,443 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:53:19,453 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;@33dde61e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:53:19,454 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:53:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-15 19:53:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 19:53:19,466 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:19,468 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:19,468 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:19,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:19,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-15 19:53:19,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27566861] [2024-09-15 19:53:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:19,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:19,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:19,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:19,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:19,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27566861] [2024-09-15 19:53:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27566861] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:19,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:19,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 19:53:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994846080] [2024-09-15 19:53:19,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:19,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 19:53:19,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 19:53:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:53:19,795 INFO L87 Difference]: Start difference. First operand has 34 states, 19 states have (on average 1.368421052631579) internal successors, (26), 22 states have internal predecessors, (26), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:53:19,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:19,908 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-15 19:53:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 19:53:19,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-15 19:53:19,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:19,921 INFO L225 Difference]: With dead ends: 62 [2024-09-15 19:53:19,921 INFO L226 Difference]: Without dead ends: 34 [2024-09-15 19:53:19,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 19:53:19,931 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:19,933 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:53:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-15 19:53:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-15 19:53:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 20 states have internal predecessors, (21), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 19:53:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-15 19:53:19,971 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-15 19:53:19,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:19,972 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-15 19:53:19,972 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-15 19:53:19,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-15 19:53:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 19:53:19,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:19,976 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:19,976 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:53:19,976 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-15 19:53:19,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:19,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828549692] [2024-09-15 19:53:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:19,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:20,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:20,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105958114] [2024-09-15 19:53:20,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:20,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:20,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:20,097 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) [2024-09-15 19:53:20,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:53:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:20,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-15 19:53:20,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:20,762 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 [2024-09-15 19:53:20,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:20,783 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 [2024-09-15 19:53:21,051 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 [2024-09-15 19:53:21,057 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 [2024-09-15 19:53:21,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:21,130 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:53:21,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:21,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828549692] [2024-09-15 19:53:21,132 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:21,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105958114] [2024-09-15 19:53:21,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105958114] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:21,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-15 19:53:21,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210575233] [2024-09-15 19:53:21,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:21,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 19:53:21,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 19:53:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-09-15 19:53:21,138 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:53:21,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:21,446 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-15 19:53:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 19:53:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2024-09-15 19:53:21,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:21,450 INFO L225 Difference]: With dead ends: 58 [2024-09-15 19:53:21,452 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 19:53:21,453 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-15 19:53:21,454 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:21,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 151 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 19:53:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2024-09-15 19:53:21,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 32 states have internal predecessors, (35), 11 states have call successors, (11), 8 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-15 19:53:21,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-15 19:53:21,479 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-09-15 19:53:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:21,481 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-15 19:53:21,481 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 19:53:21,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:21,483 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-15 19:53:21,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 19:53:21,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:21,486 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:53:21,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 19:53:21,690 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 [2024-09-15 19:53:21,691 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:21,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:21,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-15 19:53:21,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:21,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295209750] [2024-09-15 19:53:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:21,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:21,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [436191523] [2024-09-15 19:53:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:21,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:21,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:21,785 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) [2024-09-15 19:53:21,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:53:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:22,021 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-15 19:53:22,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:22,069 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 [2024-09-15 19:53:22,076 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 [2024-09-15 19:53:22,080 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 [2024-09-15 19:53:22,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:53:22,095 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 [2024-09-15 19:53:22,182 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 [2024-09-15 19:53:22,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2024-09-15 19:53:22,739 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 31 treesize of output 23 [2024-09-15 19:53:22,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 26 [2024-09-15 19:53:22,754 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 [2024-09-15 19:53:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:22,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295209750] [2024-09-15 19:53:24,089 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:24,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436191523] [2024-09-15 19:53:24,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436191523] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:53:24,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:53:24,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2024-09-15 19:53:24,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342011796] [2024-09-15 19:53:24,090 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:24,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 19:53:24,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:24,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 19:53:24,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-09-15 19:53:24,093 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 21 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-15 19:53:28,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:53:32,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:53:36,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:53:41,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:53:46,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:53:50,643 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:53:54,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2024-09-15 19:53:54,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:54,753 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2024-09-15 19:53:54,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 19:53:54,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2024-09-15 19:53:54,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:54,757 INFO L225 Difference]: With dead ends: 90 [2024-09-15 19:53:54,757 INFO L226 Difference]: Without dead ends: 80 [2024-09-15 19:53:54,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=225, Invalid=1181, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:53:54,761 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 33 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.8s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:54,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 109 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 386 Invalid, 9 Unknown, 0 Unchecked, 29.8s Time] [2024-09-15 19:53:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-15 19:53:54,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2024-09-15 19:53:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 48 states have internal predecessors, (52), 13 states have call successors, (13), 11 states have call predecessors, (13), 13 states have return successors, (20), 12 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-15 19:53:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2024-09-15 19:53:54,796 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 28 [2024-09-15 19:53:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:54,797 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2024-09-15 19:53:54,797 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 6 states have call successors, (10), 4 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-15 19:53:54,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2024-09-15 19:53:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 19:53:54,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:54,799 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] [2024-09-15 19:53:54,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:53:55,003 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 [2024-09-15 19:53:55,004 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:55,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:55,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1066845816, now seen corresponding path program 1 times [2024-09-15 19:53:55,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:55,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519698122] [2024-09-15 19:53:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:55,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:55,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:53:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:55,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:53:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:55,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 19:53:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:55,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 19:53:55,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:55,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519698122] [2024-09-15 19:53:55,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519698122] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:53:55,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:53:55,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 19:53:55,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494424707] [2024-09-15 19:53:55,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:53:55,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 19:53:55,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:55,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 19:53:55,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:53:55,747 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:53:55,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:53:55,979 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2024-09-15 19:53:55,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 19:53:55,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2024-09-15 19:53:55,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:53:55,981 INFO L225 Difference]: With dead ends: 121 [2024-09-15 19:53:55,981 INFO L226 Difference]: Without dead ends: 70 [2024-09-15 19:53:55,982 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:53:55,983 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:53:55,983 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:53:55,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-15 19:53:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-09-15 19:53:56,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 46 states have internal predecessors, (50), 13 states have call successors, (13), 11 states have call predecessors, (13), 12 states have return successors, (19), 12 states have call predecessors, (19), 10 states have call successors, (19) [2024-09-15 19:53:56,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2024-09-15 19:53:56,011 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 29 [2024-09-15 19:53:56,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:53:56,011 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2024-09-15 19:53:56,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 19:53:56,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:56,012 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2024-09-15 19:53:56,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 19:53:56,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:53:56,015 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, 1, 1, 1, 1] [2024-09-15 19:53:56,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 19:53:56,015 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:53:56,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:53:56,016 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-15 19:53:56,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:53:56,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999334560] [2024-09-15 19:53:56,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:56,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:53:56,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:53:56,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344846974] [2024-09-15 19:53:56,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:53:56,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:53:56,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:53:56,091 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) [2024-09-15 19:53:56,092 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:53:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:53:56,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-09-15 19:53:56,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:53:56,294 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 [2024-09-15 19:53:56,297 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 [2024-09-15 19:53:56,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:53:57,176 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-15 19:53:57,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-15 19:53:57,190 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 [2024-09-15 19:53:57,227 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:53:57,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:53:57,278 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-15 19:53:57,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 60 [2024-09-15 19:53:57,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:53:57,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 159 [2024-09-15 19:53:57,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:53:57,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 151 treesize of output 219 [2024-09-15 19:53:57,826 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 139 treesize of output 103 [2024-09-15 19:53:58,042 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 19:53:58,042 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:53:59,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:53:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999334560] [2024-09-15 19:53:59,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:53:59,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344846974] [2024-09-15 19:53:59,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344846974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:53:59,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:53:59,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:53:59,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109268272] [2024-09-15 19:53:59,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:53:59,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:53:59,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:53:59,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:53:59,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:53:59,580 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:54:07,851 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-15 19:54:09,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:09,041 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-09-15 19:54:09,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 19:54:09,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-15 19:54:09,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:09,043 INFO L225 Difference]: With dead ends: 88 [2024-09-15 19:54:09,043 INFO L226 Difference]: Without dead ends: 86 [2024-09-15 19:54:09,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=93, Invalid=556, Unknown=1, NotChecked=0, Total=650 [2024-09-15 19:54:09,044 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 38 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:09,044 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 260 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 373 Invalid, 1 Unknown, 0 Unchecked, 4.9s Time] [2024-09-15 19:54:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2024-09-15 19:54:09,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2024-09-15 19:54:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 56 states have internal predecessors, (60), 15 states have call successors, (15), 13 states have call predecessors, (15), 15 states have return successors, (25), 14 states have call predecessors, (25), 12 states have call successors, (25) [2024-09-15 19:54:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2024-09-15 19:54:09,098 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 35 [2024-09-15 19:54:09,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:09,098 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2024-09-15 19:54:09,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 11 states have internal predecessors, (21), 7 states have call successors, (8), 6 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 19:54:09,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:09,099 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2024-09-15 19:54:09,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 19:54:09,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:09,100 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:09,110 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 19:54:09,300 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:09,301 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:09,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 2 times [2024-09-15 19:54:09,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:09,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394326791] [2024-09-15 19:54:09,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:09,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:54:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:54:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-15 19:54:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 19:54:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 19:54:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:54:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:54:10,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:54:10,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394326791] [2024-09-15 19:54:10,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394326791] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:10,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298112705] [2024-09-15 19:54:10,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:54:10,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:10,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:10,850 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) [2024-09-15 19:54:10,852 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:54:11,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:54:11,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:54:11,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-09-15 19:54:11,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:11,097 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 [2024-09-15 19:54:11,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-15 19:54:11,110 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 [2024-09-15 19:54:11,130 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 [2024-09-15 19:54:11,856 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 [2024-09-15 19:54:24,513 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 [2024-09-15 19:54:24,588 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:24,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-09-15 19:54:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 19:54:25,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:54:27,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298112705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:54:27,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:54:27,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2024-09-15 19:54:27,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201406562] [2024-09-15 19:54:27,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:54:27,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-15 19:54:27,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:54:27,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-15 19:54:27,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1568, Unknown=3, NotChecked=0, Total=1722 [2024-09-15 19:54:27,197 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 31 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:54:31,329 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] [2024-09-15 19:54:36,619 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] [2024-09-15 19:54:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:54:53,738 INFO L93 Difference]: Finished difference Result 186 states and 224 transitions. [2024-09-15 19:54:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 19:54:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 46 [2024-09-15 19:54:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:54:53,740 INFO L225 Difference]: With dead ends: 186 [2024-09-15 19:54:53,741 INFO L226 Difference]: Without dead ends: 117 [2024-09-15 19:54:53,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=347, Invalid=3186, Unknown=7, NotChecked=0, Total=3540 [2024-09-15 19:54:53,745 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 27 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:54:53,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 110 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 927 Invalid, 5 Unknown, 0 Unchecked, 9.3s Time] [2024-09-15 19:54:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-15 19:54:53,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 111. [2024-09-15 19:54:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.0985915492957747) internal successors, (78), 74 states have internal predecessors, (78), 19 states have call successors, (19), 17 states have call predecessors, (19), 20 states have return successors, (31), 19 states have call predecessors, (31), 16 states have call successors, (31) [2024-09-15 19:54:53,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 128 transitions. [2024-09-15 19:54:53,799 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 128 transitions. Word has length 46 [2024-09-15 19:54:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:54:53,800 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 128 transitions. [2024-09-15 19:54:53,800 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.08) internal successors, (52), 24 states have internal predecessors, (52), 12 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-15 19:54:53,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:53,801 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 128 transitions. [2024-09-15 19:54:53,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 19:54:53,804 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:54:53,805 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:54:53,825 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:54:54,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:54,009 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:54:54,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:54:54,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 3 times [2024-09-15 19:54:54,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:54:54,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566621584] [2024-09-15 19:54:54,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:54:54,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:54:54,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:54:54,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1073959023] [2024-09-15 19:54:54,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:54:54,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:54:54,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:54:54,243 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) [2024-09-15 19:54:54,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:54:54,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 19:54:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:54:54,780 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 285 conjuncts are in the unsatisfiable core [2024-09-15 19:54:54,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:54:54,813 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 [2024-09-15 19:54:54,825 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 [2024-09-15 19:54:54,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:54:54,841 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 [2024-09-15 19:54:54,853 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 [2024-09-15 19:54:55,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:55,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:54:55,631 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 [2024-09-15 19:54:56,438 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 [2024-09-15 19:54:56,469 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-15 19:54:56,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-15 19:54:56,607 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-15 19:54:56,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2024-09-15 19:54:56,674 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-15 19:54:56,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-15 19:54:58,099 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 [2024-09-15 19:54:58,115 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 [2024-09-15 19:54:58,331 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-15 19:54:58,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 108 treesize of output 110 [2024-09-15 19:54:58,568 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 [2024-09-15 19:54:59,550 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:59,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 217 treesize of output 417 [2024-09-15 19:54:59,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:54:59,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 297 treesize of output 465 [2024-09-15 19:55:02,950 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:55:02,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:32,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:55:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566621584] [2024-09-15 19:55:32,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:55:32,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073959023] [2024-09-15 19:55:32,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073959023] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:55:32,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:55:32,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-15 19:55:32,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021305323] [2024-09-15 19:55:32,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:55:32,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:55:32,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:55:32,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:55:32,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1358, Unknown=5, NotChecked=0, Total=1482 [2024-09-15 19:55:32,464 INFO L87 Difference]: Start difference. First operand 111 states and 128 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:55:36,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:55:36,519 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-15 19:55:36,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-15 19:55:36,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-09-15 19:55:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:55:36,522 INFO L225 Difference]: With dead ends: 174 [2024-09-15 19:55:36,522 INFO L226 Difference]: Without dead ends: 160 [2024-09-15 19:55:36,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=206, Invalid=2141, Unknown=5, NotChecked=0, Total=2352 [2024-09-15 19:55:36,524 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 39 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:55:36,524 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 586 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1123 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2024-09-15 19:55:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-09-15 19:55:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2024-09-15 19:55:36,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 101 states have internal predecessors, (107), 26 states have call successors, (26), 23 states have call predecessors, (26), 26 states have return successors, (48), 25 states have call predecessors, (48), 23 states have call successors, (48) [2024-09-15 19:55:36,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2024-09-15 19:55:36,603 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 52 [2024-09-15 19:55:36,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:55:36,603 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2024-09-15 19:55:36,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 20 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:55:36,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2024-09-15 19:55:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-15 19:55:36,606 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:55:36,606 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, 1, 1, 1, 1] [2024-09-15 19:55:36,618 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 19:55:36,806 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-15 19:55:36,807 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:55:36,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:55:36,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-15 19:55:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:55:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441569510] [2024-09-15 19:55:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:36,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:55:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:55:36,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331381250] [2024-09-15 19:55:36,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:55:36,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:55:36,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:55:36,891 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) [2024-09-15 19:55:36,895 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:55:37,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:55:37,128 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 172 conjuncts are in the unsatisfiable core [2024-09-15 19:55:37,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:55:37,143 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 [2024-09-15 19:55:37,150 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 [2024-09-15 19:55:37,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-15 19:55:37,161 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 [2024-09-15 19:55:37,346 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 15 treesize of output 11 [2024-09-15 19:55:37,539 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 [2024-09-15 19:55:37,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:37,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2024-09-15 19:55:38,674 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:55:38,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:55:38,688 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 [2024-09-15 19:55:38,755 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 [2024-09-15 19:55:38,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:38,778 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 26 treesize of output 26 [2024-09-15 19:55:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-15 19:55:38,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:55:43,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:55:43,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 59 [2024-09-15 19:56:33,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441569510] [2024-09-15 19:56:33,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:33,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331381250] [2024-09-15 19:56:33,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331381250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:33,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:33,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-15 19:56:33,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777400185] [2024-09-15 19:56:33,654 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:33,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 19:56:33,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 19:56:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=829, Unknown=9, NotChecked=0, Total=930 [2024-09-15 19:56:33,655 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 19:56:39,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:56:39,888 INFO L93 Difference]: Finished difference Result 156 states and 186 transitions. [2024-09-15 19:56:39,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 19:56:39,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 47 [2024-09-15 19:56:39,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:56:39,890 INFO L225 Difference]: With dead ends: 156 [2024-09-15 19:56:39,890 INFO L226 Difference]: Without dead ends: 125 [2024-09-15 19:56:39,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=172, Invalid=1540, Unknown=10, NotChecked=0, Total=1722 [2024-09-15 19:56:39,891 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:56:39,892 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 196 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-15 19:56:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-09-15 19:56:39,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-09-15 19:56:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.125) internal successors, (90), 84 states have internal predecessors, (90), 22 states have call successors, (22), 19 states have call predecessors, (22), 22 states have return successors, (43), 21 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-15 19:56:39,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 155 transitions. [2024-09-15 19:56:39,953 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 155 transitions. Word has length 47 [2024-09-15 19:56:39,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:56:39,954 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 155 transitions. [2024-09-15 19:56:39,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 8 states have call successors, (9), 5 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 19:56:39,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:39,954 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 155 transitions. [2024-09-15 19:56:39,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-15 19:56:39,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:56:39,956 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:56:39,965 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 19:56:40,160 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:40,161 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:56:40,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:56:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-15 19:56:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:56:40,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976252054] [2024-09-15 19:56:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:56:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:56:40,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586921535] [2024-09-15 19:56:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:56:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:56:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:56:40,234 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) [2024-09-15 19:56:40,236 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:56:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:56:40,625 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 272 conjuncts are in the unsatisfiable core [2024-09-15 19:56:40,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:56:40,641 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 [2024-09-15 19:56:40,646 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 [2024-09-15 19:56:40,652 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 [2024-09-15 19:56:40,660 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 [2024-09-15 19:56:40,665 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 [2024-09-15 19:56:41,188 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 [2024-09-15 19:56:41,827 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 [2024-09-15 19:56:41,843 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-15 19:56:41,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-15 19:56:41,975 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-15 19:56:41,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 61 [2024-09-15 19:56:42,034 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-15 19:56:42,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 29 [2024-09-15 19:56:43,706 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 [2024-09-15 19:56:43,722 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 [2024-09-15 19:56:44,233 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:44,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 184 [2024-09-15 19:56:44,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:56:44,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 126 [2024-09-15 19:56:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 19:56:44,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:56:59,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:56:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976252054] [2024-09-15 19:56:59,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:56:59,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586921535] [2024-09-15 19:56:59,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586921535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:56:59,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:56:59,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2024-09-15 19:56:59,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650509772] [2024-09-15 19:56:59,015 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:56:59,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 19:56:59,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:56:59,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 19:56:59,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1569, Unknown=2, NotChecked=0, Total=1722 [2024-09-15 19:56:59,016 INFO L87 Difference]: Start difference. First operand 125 states and 155 transitions. Second operand has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:57:07,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:57:07,636 INFO L93 Difference]: Finished difference Result 141 states and 173 transitions. [2024-09-15 19:57:07,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 19:57:07,636 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 52 [2024-09-15 19:57:07,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:57:07,638 INFO L225 Difference]: With dead ends: 141 [2024-09-15 19:57:07,638 INFO L226 Difference]: Without dead ends: 139 [2024-09-15 19:57:07,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=289, Invalid=2788, Unknown=3, NotChecked=0, Total=3080 [2024-09-15 19:57:07,639 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 30 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 942 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:57:07,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 389 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 942 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-15 19:57:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-15 19:57:07,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 125. [2024-09-15 19:57:07,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.125) internal successors, (90), 84 states have internal predecessors, (90), 22 states have call successors, (22), 19 states have call predecessors, (22), 22 states have return successors, (42), 21 states have call predecessors, (42), 19 states have call successors, (42) [2024-09-15 19:57:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 154 transitions. [2024-09-15 19:57:07,708 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 154 transitions. Word has length 52 [2024-09-15 19:57:07,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:57:07,709 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 154 transitions. [2024-09-15 19:57:07,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 21 states have internal predecessors, (31), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2024-09-15 19:57:07,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 154 transitions. [2024-09-15 19:57:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-15 19:57:07,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:57:07,711 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 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] [2024-09-15 19:57:07,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 19:57:07,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:07,912 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:57:07,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:57:07,912 INFO L85 PathProgramCache]: Analyzing trace with hash 992478086, now seen corresponding path program 4 times [2024-09-15 19:57:07,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:57:07,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091703354] [2024-09-15 19:57:07,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:57:07,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:57:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:57:08,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [36390177] [2024-09-15 19:57:08,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 19:57:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:57:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:57:08,010 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) [2024-09-15 19:57:08,011 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:57:08,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 19:57:08,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:57:08,320 WARN L260 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 305 conjuncts are in the unsatisfiable core [2024-09-15 19:57:08,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:57:08,336 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 [2024-09-15 19:57:08,345 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 [2024-09-15 19:57:08,350 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 11 treesize of output 7 [2024-09-15 19:57:08,357 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 [2024-09-15 19:57:08,361 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 [2024-09-15 19:57:08,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:08,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-15 19:57:09,441 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 [2024-09-15 19:57:10,157 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-15 19:57:10,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 21 [2024-09-15 19:57:10,172 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 [2024-09-15 19:57:10,295 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-15 19:57:10,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 53 [2024-09-15 19:57:10,339 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-15 19:57:10,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 25 [2024-09-15 19:57:11,797 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 [2024-09-15 19:57:11,820 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 [2024-09-15 19:57:11,966 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 [2024-09-15 19:57:12,012 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-15 19:57:12,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 100 [2024-09-15 19:57:12,926 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:12,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 178 treesize of output 350 [2024-09-15 19:57:13,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-15 19:57:13,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 92 treesize of output 228 [2024-09-15 19:57:14,173 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 19:57:14,173 INFO L327 TraceCheckSpWp]: Computing backward predicates...