./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 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:12:50,805 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:12:50,869 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:12:50,884 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:12:50,884 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:12:50,916 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:12:50,918 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:12:50,919 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:12:50,919 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:12:50,921 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:12:50,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:12:50,922 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:12:50,922 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:12:50,922 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:12:50,924 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:12:50,924 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:12:50,925 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:12:50,925 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:12:50,925 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:12:50,925 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:12:50,926 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:12:50,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:12:50,929 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:12:50,930 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:12:50,930 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:12:50,930 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:12:50,930 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:12:50,931 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:12:50,931 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:12:50,931 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:12:50,931 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:12:50,931 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:12:50,932 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:12:50,932 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:12:50,932 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:12:50,933 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:12:50,933 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:12:50,933 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:12:50,934 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:12:50,934 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:12:50,935 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:12:50,935 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:12:50,935 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 07d2bb25a1c8c4ef92611e8b25e211f661495bf054d1380ec62ffea892b45c2f Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:12:51,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:12:51,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:12:51,191 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:12:51,192 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:12:51,193 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:12:51,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-20 13:12:52,542 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:12:52,794 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:12:52,795 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursified_nla-digbench/recursified_divbin2.i [2024-09-20 13:12:52,801 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/3ccb5e465/0e83ee01c1e84787ac0aaf8efecb5170/FLAG8c3bcbb96 [2024-09-20 13:12:53,168 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/3ccb5e465/0e83ee01c1e84787ac0aaf8efecb5170 [2024-09-20 13:12:53,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:12:53,172 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:12:53,173 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:12:53,174 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:12:53,178 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:12:53,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a57c28b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53, skipping insertion in model container [2024-09-20 13:12:53,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,199 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:12:53,342 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] [2024-09-20 13:12:53,367 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:12:53,389 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:12:53,403 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] [2024-09-20 13:12:53,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:12:53,444 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:12:53,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53 WrapperNode [2024-09-20 13:12:53,445 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:12:53,446 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:12:53,446 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:12:53,446 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:12:53,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,467 INFO L138 Inliner]: procedures = 19, calls = 59, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:12:53,467 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:12:53,468 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:12:53,468 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:12:53,468 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:12:53,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,498 INFO L175 MemorySlicer]: Split 34 memory accesses to 6 slices as follows [2, 7, 4, 7, 11, 3]. 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, 1, 2, 3, 1]. [2024-09-20 13:12:53,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,499 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,511 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,512 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,515 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:12:53,516 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:12:53,516 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:12:53,516 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:12:53,517 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (1/1) ... [2024-09-20 13:12:53,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:12:53,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:53,547 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 13:12:53,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 13:12:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:12:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_33_to_35_0 [2024-09-20 13:12:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_33_to_35_0 [2024-09-20 13:12:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:12:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:12:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:12:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 13:12:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 13:12:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 13:12:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 13:12:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:12:53,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_37_to_44_0 [2024-09-20 13:12:53,595 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_37_to_44_0 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:12:53,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 13:12:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 13:12:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 13:12:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-09-20 13:12:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 13:12:53,596 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 13:12:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 13:12:53,687 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:12:53,690 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:12:53,937 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 13:12:53,937 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:12:53,965 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:12:53,966 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-20 13:12:53,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:12:53 BoogieIcfgContainer [2024-09-20 13:12:53,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:12:53,970 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:12:53,970 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:12:53,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:12:53,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:12:53" (1/3) ... [2024-09-20 13:12:53,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:12:53, skipping insertion in model container [2024-09-20 13:12:53,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:12:53" (2/3) ... [2024-09-20 13:12:53,976 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9354d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:12:53, skipping insertion in model container [2024-09-20 13:12:53,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:12:53" (3/3) ... [2024-09-20 13:12:53,978 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_divbin2.i [2024-09-20 13:12:53,993 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:12:53,994 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:12:54,049 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:12:54,055 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;@3c0e8749, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:12:54,055 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:12:54,058 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) [2024-09-20 13:12:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 13:12:54,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:54,065 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:54,065 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:54,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1751035744, now seen corresponding path program 1 times [2024-09-20 13:12:54,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:54,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893904867] [2024-09-20 13:12:54,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:54,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:54,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:12:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893904867] [2024-09-20 13:12:54,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893904867] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:54,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:54,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:12:54,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045296531] [2024-09-20 13:12:54,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:54,357 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 13:12:54,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:54,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 13:12:54,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 13:12:54,380 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) [2024-09-20 13:12:54,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:54,486 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2024-09-20 13:12:54,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 13:12:54,489 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 [2024-09-20 13:12:54,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:54,497 INFO L225 Difference]: With dead ends: 62 [2024-09-20 13:12:54,497 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 13:12:54,500 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 [2024-09-20 13:12:54,505 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 [2024-09-20 13:12:54,506 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] [2024-09-20 13:12:54,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 13:12:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-20 13:12:54,542 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) [2024-09-20 13:12:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-09-20 13:12:54,546 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 17 [2024-09-20 13:12:54,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:54,547 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-09-20 13:12:54,547 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) [2024-09-20 13:12:54,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:54,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-09-20 13:12:54,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 13:12:54,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:54,550 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:12:54,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:12:54,550 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:54,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:54,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1433330127, now seen corresponding path program 1 times [2024-09-20 13:12:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:54,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27210196] [2024-09-20 13:12:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:54,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:54,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017533751] [2024-09-20 13:12:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:54,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:54,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:54,644 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:12:54,645 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:12:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:54,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-09-20 13:12:54,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:54,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:54,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:54,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:55,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:55,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:55,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:55,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:12:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27210196] [2024-09-20 13:12:55,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:55,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017533751] [2024-09-20 13:12:55,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017533751] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:55,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:55,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-20 13:12:55,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855650964] [2024-09-20 13:12:55,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:55,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 13:12:55,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 13:12:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-20 13:12:55,209 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2024-09-20 13:12:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:55,495 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-09-20 13:12:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 13:12:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 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 [2024-09-20 13:12:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:55,498 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:12:55,498 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:12:55,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:12:55,500 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 40 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:55,500 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:12:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:12:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2024-09-20 13:12:55,522 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) [2024-09-20 13:12:55,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-20 13:12:55,526 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 18 [2024-09-20 13:12:55,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:55,526 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-20 13:12:55,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.375) internal successors, (11), 8 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) [2024-09-20 13:12:55,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-20 13:12:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 13:12:55,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:55,528 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] [2024-09-20 13:12:55,547 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:12:55,729 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 [2024-09-20 13:12:55,729 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:55,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:55,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1475040199, now seen corresponding path program 1 times [2024-09-20 13:12:55,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:55,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378484056] [2024-09-20 13:12:55,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:55,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:55,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [721112627] [2024-09-20 13:12:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:55,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:55,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:55,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:12:55,842 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:12:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:55,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 13:12:56,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:56,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:56,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:56,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:56,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:56,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 13:12:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:56,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:12:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378484056] [2024-09-20 13:12:56,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:12:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721112627] [2024-09-20 13:12:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721112627] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-20 13:12:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161006072] [2024-09-20 13:12:56,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:56,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 13:12:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:56,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 13:12:56,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 13:12:56,317 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 13:12:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:56,668 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2024-09-20 13:12:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 13:12:56,670 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2024-09-20 13:12:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:56,671 INFO L225 Difference]: With dead ends: 59 [2024-09-20 13:12:56,671 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 13:12:56,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:12:56,674 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:56,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 77 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:12:56,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 13:12:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-09-20 13:12:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 34 states have internal predecessors, (37), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (12), 9 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-20 13:12:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2024-09-20 13:12:56,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 28 [2024-09-20 13:12:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:56,707 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2024-09-20 13:12:56,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 13:12:56,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:56,709 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2024-09-20 13:12:56,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 13:12:56,710 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:56,710 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] [2024-09-20 13:12:56,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 13:12:56,911 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 [2024-09-20 13:12:56,912 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:56,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:56,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1066845816, now seen corresponding path program 1 times [2024-09-20 13:12:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:56,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141465365] [2024-09-20 13:12:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:56,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:56,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:12:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:12:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-20 13:12:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:12:57,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:12:57,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141465365] [2024-09-20 13:12:57,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141465365] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:12:57,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:12:57,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-20 13:12:57,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778320293] [2024-09-20 13:12:57,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:12:57,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 13:12:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:12:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 13:12:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:12:57,649 INFO L87 Difference]: Start difference. First operand 51 states and 60 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) [2024-09-20 13:12:57,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:12:57,850 INFO L93 Difference]: Finished difference Result 99 states and 117 transitions. [2024-09-20 13:12:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:12:57,851 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 [2024-09-20 13:12:57,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:12:57,852 INFO L225 Difference]: With dead ends: 99 [2024-09-20 13:12:57,852 INFO L226 Difference]: Without dead ends: 53 [2024-09-20 13:12:57,853 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 [2024-09-20 13:12:57,853 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:12:57,854 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 68 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:12:57,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-20 13:12:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-20 13:12:57,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-20 13:12:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2024-09-20 13:12:57,881 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2024-09-20 13:12:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:12:57,881 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2024-09-20 13:12:57,881 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) [2024-09-20 13:12:57,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:57,882 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2024-09-20 13:12:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 13:12:57,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:12:57,883 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] [2024-09-20 13:12:57,884 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 13:12:57,884 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:12:57,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:12:57,887 INFO L85 PathProgramCache]: Analyzing trace with hash 207588481, now seen corresponding path program 1 times [2024-09-20 13:12:57,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:12:57,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544139503] [2024-09-20 13:12:57,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:57,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:12:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:12:57,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [715616450] [2024-09-20 13:12:57,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:12:57,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:12:57,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:12:57,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:12:58,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:12:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:12:58,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 127 conjuncts are in the unsatisfiable core [2024-09-20 13:12:58,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:12:58,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:58,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:12:58,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:12:58,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:12:58,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 13:12:58,640 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-20 13:12:58,640 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 [2024-09-20 13:12:58,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:12:58,724 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:12:58,724 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 [2024-09-20 13:12:58,766 INFO L349 Elim1Store]: treesize reduction 22, result has 56.0 percent of original size [2024-09-20 13:12:58,767 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 46 treesize of output 55 [2024-09-20 13:12:59,149 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:12:59,150 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 92 treesize of output 144 [2024-09-20 13:12:59,218 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:12:59,219 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 76 treesize of output 160 [2024-09-20 13:12:59,239 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 142 treesize of output 102 [2024-09-20 13:12:59,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:12:59,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:12:59,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2024-09-20 13:13:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544139503] [2024-09-20 13:13:00,010 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715616450] [2024-09-20 13:13:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715616450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:00,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:00,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-20 13:13:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968175345] [2024-09-20 13:13:00,012 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:00,013 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:13:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:13:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:13:00,014 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 13:13:00,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:00,871 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2024-09-20 13:13:00,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:13:00,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-09-20 13:13:00,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:00,873 INFO L225 Difference]: With dead ends: 73 [2024-09-20 13:13:00,873 INFO L226 Difference]: Without dead ends: 71 [2024-09-20 13:13:00,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-20 13:13:00,875 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 44 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:00,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 180 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 13:13:00,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-20 13:13:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2024-09-20 13:13:00,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.170731707317073) internal successors, (48), 45 states have internal predecessors, (48), 13 states have call successors, (13), 10 states have call predecessors, (13), 12 states have return successors, (18), 11 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:13:00,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2024-09-20 13:13:00,922 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 35 [2024-09-20 13:13:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:00,923 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2024-09-20 13:13:00,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 11 states have internal predecessors, (22), 7 states have call successors, (8), 6 states have call predecessors, (8), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 13:13:00,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2024-09-20 13:13:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 13:13:00,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:00,925 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] [2024-09-20 13:13:00,934 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:01,129 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:01,130 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:01,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:01,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2101514835, now seen corresponding path program 1 times [2024-09-20 13:13:01,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:01,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436875451] [2024-09-20 13:13:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:01,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:01,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:01,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:02,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:13:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:02,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 13:13:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:03,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:13:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:03,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:13:03,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:03,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 13:13:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:13:03,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436875451] [2024-09-20 13:13:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436875451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393475679] [2024-09-20 13:13:03,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:03,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:03,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:03,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:03,080 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:13:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:03,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-09-20 13:13:03,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:03,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:03,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:03,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:03,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:03,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:03,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-09-20 13:13:03,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:04,306 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 [2024-09-20 13:13:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:13:04,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:04,762 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 30 [2024-09-20 13:13:05,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-09-20 13:13:05,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 34 [2024-09-20 13:13:06,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393475679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:06,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:13:06,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2024-09-20 13:13:06,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408585041] [2024-09-20 13:13:06,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:06,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 13:13:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:06,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 13:13:06,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1731, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 13:13:06,128 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 32 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 26 states have internal predecessors, (50), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-20 13:13:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:08,417 INFO L93 Difference]: Finished difference Result 86 states and 111 transitions. [2024-09-20 13:13:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 13:13:08,418 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 26 states have internal predecessors, (50), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 47 [2024-09-20 13:13:08,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:08,419 INFO L225 Difference]: With dead ends: 86 [2024-09-20 13:13:08,420 INFO L226 Difference]: Without dead ends: 70 [2024-09-20 13:13:08,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=390, Invalid=3392, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 13:13:08,422 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:08,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 84 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 13:13:08,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-20 13:13:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2024-09-20 13:13:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 44 states have internal predecessors, (45), 14 states have call successors, (14), 9 states have call predecessors, (14), 13 states have return successors, (29), 13 states have call predecessors, (29), 12 states have call successors, (29) [2024-09-20 13:13:08,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 88 transitions. [2024-09-20 13:13:08,466 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 88 transitions. Word has length 47 [2024-09-20 13:13:08,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:08,467 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 88 transitions. [2024-09-20 13:13:08,467 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 26 states have internal predecessors, (50), 13 states have call successors, (15), 7 states have call predecessors, (15), 8 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2024-09-20 13:13:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:08,467 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 88 transitions. [2024-09-20 13:13:08,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 13:13:08,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:08,470 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] [2024-09-20 13:13:08,488 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:13:08,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:08,672 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1905411784, now seen corresponding path program 2 times [2024-09-20 13:13:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795085626] [2024-09-20 13:13:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:13:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,697 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:13:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:13:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-20 13:13:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-20 13:13:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:13:09,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795085626] [2024-09-20 13:13:09,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795085626] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:09,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141928896] [2024-09-20 13:13:09,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:13:09,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:09,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:09,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:09,872 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:13:10,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:13:10,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:13:10,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-09-20 13:13:10,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:10,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:10,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:10,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:10,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:10,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:11,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-09-20 13:13:11,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:13:11,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:13,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141928896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:13,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 13:13:13,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 30 [2024-09-20 13:13:13,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935217727] [2024-09-20 13:13:13,011 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:13,012 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 13:13:13,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:13,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 13:13:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 13:13:13,015 INFO L87 Difference]: Start difference. First operand 67 states and 88 transitions. Second operand has 30 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:13:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:14,570 INFO L93 Difference]: Finished difference Result 163 states and 203 transitions. [2024-09-20 13:13:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-20 13:13:14,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2024-09-20 13:13:14,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:14,573 INFO L225 Difference]: With dead ends: 163 [2024-09-20 13:13:14,574 INFO L226 Difference]: Without dead ends: 100 [2024-09-20 13:13:14,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=321, Invalid=2871, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 13:13:14,576 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 28 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:14,577 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 125 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 770 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 13:13:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-20 13:13:14,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2024-09-20 13:13:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.098360655737705) internal successors, (67), 64 states have internal predecessors, (67), 18 states have call successors, (18), 15 states have call predecessors, (18), 16 states have return successors, (26), 16 states have call predecessors, (26), 15 states have call successors, (26) [2024-09-20 13:13:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2024-09-20 13:13:14,620 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 46 [2024-09-20 13:13:14,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:14,621 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2024-09-20 13:13:14,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 11 states have call successors, (16), 10 states have call predecessors, (16), 7 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:13:14,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:14,621 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2024-09-20 13:13:14,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 13:13:14,623 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:14,623 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] [2024-09-20 13:13:14,632 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:13:14,827 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 [2024-09-20 13:13:14,828 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:14,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:14,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1276039393, now seen corresponding path program 3 times [2024-09-20 13:13:14,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:14,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465027536] [2024-09-20 13:13:14,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:14,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:14,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381039092] [2024-09-20 13:13:14,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 13:13:14,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:14,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:14,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:13:15,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 13:13:15,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:13:15,501 WARN L260 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 241 conjuncts are in the unsatisfiable core [2024-09-20 13:13:15,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:15,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:15,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:15,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:15,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:15,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:16,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:16,447 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-20 13:13:16,447 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 [2024-09-20 13:13:16,551 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-20 13:13:16,551 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 [2024-09-20 13:13:16,602 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-20 13:13:16,603 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 [2024-09-20 13:13:17,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:17,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:17,755 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-20 13:13:17,755 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 [2024-09-20 13:13:17,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:18,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:18,610 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 158 treesize of output 290 [2024-09-20 13:13:18,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:18,710 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 228 treesize of output 296 [2024-09-20 13:13:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 13:13:19,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:35,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:35,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465027536] [2024-09-20 13:13:35,301 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:35,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381039092] [2024-09-20 13:13:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381039092] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:35,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:35,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-20 13:13:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538892224] [2024-09-20 13:13:35,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:35,302 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 13:13:35,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 13:13:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1158, Unknown=3, NotChecked=0, Total=1260 [2024-09-20 13:13:35,303 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 24 states, 20 states have (on average 1.55) internal successors, (31), 18 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) [2024-09-20 13:13:42,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:13:42,400 INFO L93 Difference]: Finished difference Result 149 states and 176 transitions. [2024-09-20 13:13:42,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 13:13:42,400 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 18 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 [2024-09-20 13:13:42,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:13:42,402 INFO L225 Difference]: With dead ends: 149 [2024-09-20 13:13:42,402 INFO L226 Difference]: Without dead ends: 145 [2024-09-20 13:13:42,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=170, Invalid=1896, Unknown=4, NotChecked=0, Total=2070 [2024-09-20 13:13:42,404 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 38 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 13:13:42,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 646 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1250 Invalid, 1 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 13:13:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-20 13:13:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2024-09-20 13:13:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 93 states have internal predecessors, (99), 24 states have call successors, (24), 21 states have call predecessors, (24), 24 states have return successors, (40), 23 states have call predecessors, (40), 21 states have call successors, (40) [2024-09-20 13:13:42,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 163 transitions. [2024-09-20 13:13:42,490 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 163 transitions. Word has length 52 [2024-09-20 13:13:42,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:13:42,491 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 163 transitions. [2024-09-20 13:13:42,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.55) internal successors, (31), 18 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) [2024-09-20 13:13:42,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:42,493 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 163 transitions. [2024-09-20 13:13:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 13:13:42,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:13:42,495 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] [2024-09-20 13:13:42,503 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-20 13:13:42,695 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 [2024-09-20 13:13:42,696 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:13:42,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:13:42,696 INFO L85 PathProgramCache]: Analyzing trace with hash -2085386019, now seen corresponding path program 1 times [2024-09-20 13:13:42,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:13:42,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929964493] [2024-09-20 13:13:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:42,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:13:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:13:42,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968437568] [2024-09-20 13:13:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:13:42,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:13:42,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:13:42,775 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:13:42,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:13:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:13:43,074 WARN L260 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 232 conjuncts are in the unsatisfiable core [2024-09-20 13:13:43,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:13:43,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:43,091 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:43,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:13:43,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:13:43,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:13:43,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:43,883 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-20 13:13:43,883 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 [2024-09-20 13:13:43,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:43,976 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-20 13:13:43,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-09-20 13:13:44,031 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:13:44,032 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 [2024-09-20 13:13:45,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:45,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:13:45,340 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:45,340 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 97 treesize of output 177 [2024-09-20 13:13:45,375 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:13:45,376 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 151 treesize of output 175 [2024-09-20 13:13:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 13:13:45,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:13:58,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:13:58,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929964493] [2024-09-20 13:13:58,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:13:58,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968437568] [2024-09-20 13:13:58,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968437568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:13:58,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:13:58,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2024-09-20 13:13:58,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944020840] [2024-09-20 13:13:58,805 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:13:58,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 13:13:58,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:13:58,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 13:13:58,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1427, Unknown=2, NotChecked=0, Total=1560 [2024-09-20 13:13:58,806 INFO L87 Difference]: Start difference. First operand 138 states and 163 transitions. Second operand has 26 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 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) [2024-09-20 13:14:03,190 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] [2024-09-20 13:14:11,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:15,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:19,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:23,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:14:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:14:25,653 INFO L93 Difference]: Finished difference Result 158 states and 186 transitions. [2024-09-20 13:14:25,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 13:14:25,653 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 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 [2024-09-20 13:14:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:14:25,655 INFO L225 Difference]: With dead ends: 158 [2024-09-20 13:14:25,655 INFO L226 Difference]: Without dead ends: 148 [2024-09-20 13:14:25,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=246, Invalid=2403, Unknown=3, NotChecked=0, Total=2652 [2024-09-20 13:14:25,656 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 32 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 12 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2024-09-20 13:14:25,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 434 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 898 Invalid, 5 Unknown, 0 Unchecked, 21.3s Time] [2024-09-20 13:14:25,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-09-20 13:14:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2024-09-20 13:14:25,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 95 states have (on average 1.105263157894737) internal successors, (105), 99 states have internal predecessors, (105), 26 states have call successors, (26), 23 states have call predecessors, (26), 24 states have return successors, (42), 23 states have call predecessors, (42), 23 states have call successors, (42) [2024-09-20 13:14:25,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 173 transitions. [2024-09-20 13:14:25,748 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 173 transitions. Word has length 52 [2024-09-20 13:14:25,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:14:25,749 INFO L474 AbstractCegarLoop]: Abstraction has 146 states and 173 transitions. [2024-09-20 13:14:25,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 20 states have internal predecessors, (33), 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) [2024-09-20 13:14:25,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:25,749 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 173 transitions. [2024-09-20 13:14:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 13:14:25,750 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:14:25,750 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] [2024-09-20 13:14:25,762 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 13:14:25,950 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 [2024-09-20 13:14:25,951 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:14:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:14:25,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1283866385, now seen corresponding path program 1 times [2024-09-20 13:14:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:14:25,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179910693] [2024-09-20 13:14:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:14:25,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:14:25,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390441072] [2024-09-20 13:14:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:14:25,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:14:25,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:14:25,999 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:14:26,000 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:14:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:14:26,236 WARN L260 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 190 conjuncts are in the unsatisfiable core [2024-09-20 13:14:26,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:14:26,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:14:26,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:26,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:14:26,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:14:26,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:14:26,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:14:26,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:26,639 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 [2024-09-20 13:14:37,132 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:14:37,133 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 [2024-09-20 13:14:37,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:37,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2024-09-20 13:14:37,165 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-20 13:14:37,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 3 [2024-09-20 13:14:37,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-09-20 13:14:37,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:37,237 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 48 treesize of output 40 [2024-09-20 13:14:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 13:14:37,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:14:50,463 WARN L293 SmtUtils]: Spent 12.53s on a formula simplification. DAG size of input: 157 DAG size of output: 155 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2024-09-20 13:14:52,314 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:14:52,315 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 [2024-09-20 13:14:58,356 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_old(#memory_int#4)| |c_func_to_recursive_line_37_to_44_0_#in~b.base|) |c_func_to_recursive_line_37_to_44_0_#in~b.offset|))) (and (or (= (mod (select (select |c_#memory_int#5| |c_func_to_recursive_line_37_to_44_0_#in~B.base|) |c_func_to_recursive_line_37_to_44_0_#in~B.offset|) 4294967296) (mod .cse0 4294967296)) (forall ((|v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (= (mod (+ (select (select |c_#memory_int#3| |v_func_to_recursive_line_37_to_44_0_#in~r.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~r.offset_BEFORE_CALL_8|) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|))) 4294967296) (mod (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|) 4294967296)))) (forall ((|v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4| Int) (|v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4| Int)) (let ((.cse1 (select (select |c_#memory_int#2| |v_func_to_recursive_line_37_to_44_0_#in~A.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~A.offset_BEFORE_CALL_4|))) (or (< (mod (+ (* (select (select |c_old(#memory_int#1)| |c_func_to_recursive_line_37_to_44_0_#in~q.base|) |c_func_to_recursive_line_37_to_44_0_#in~q.offset|) .cse0) .cse1 4294967295 (* (select (select |c_old(#memory_int#4)| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|) 4294967295 (select (select |c_old(#memory_int#1)| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|)) (* 4294967295 (select (select |c_#memory_int#2| |c_func_to_recursive_line_37_to_44_0_#in~A.base|) |c_func_to_recursive_line_37_to_44_0_#in~A.offset|))) 4294967296) 4294967295) (= (mod .cse1 4294967296) (mod (+ (select (select |c_#memory_int#3| |c_func_to_recursive_line_37_to_44_0_#in~r.base|) |c_func_to_recursive_line_37_to_44_0_#in~r.offset|) (* (select (select |c_#memory_int#4| |v_func_to_recursive_line_37_to_44_0_#in~b.base_BEFORE_CALL_8|) |v_func_to_recursive_line_37_to_44_0_#in~b.offset_BEFORE_CALL_8|) (select (select |c_#memory_int#1| |v_func_to_recursive_line_37_to_44_0_#in~q.base_BEFORE_CALL_4|) |v_func_to_recursive_line_37_to_44_0_#in~q.offset_BEFORE_CALL_4|))) 4294967296))))))) is different from false [2024-09-20 13:15:03,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:15:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179910693] [2024-09-20 13:15:03,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:15:03,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390441072] [2024-09-20 13:15:03,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390441072] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:15:03,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:15:03,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2024-09-20 13:15:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074446369] [2024-09-20 13:15:03,313 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:15:03,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 13:15:03,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:15:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 13:15:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=4, NotChecked=68, Total=1332 [2024-09-20 13:15:03,315 INFO L87 Difference]: Start difference. First operand 146 states and 173 transitions. Second operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 13:15:07,388 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] [2024-09-20 13:15:11,536 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:15,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:19,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:23,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:27,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:35,895 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:39,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:44,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:15:47,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:15:47,327 INFO L93 Difference]: Finished difference Result 148 states and 174 transitions. [2024-09-20 13:15:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 13:15:47,327 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 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 [2024-09-20 13:15:47,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:15:47,328 INFO L225 Difference]: With dead ends: 148 [2024-09-20 13:15:47,328 INFO L226 Difference]: Without dead ends: 117 [2024-09-20 13:15:47,329 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=321, Invalid=2870, Unknown=5, NotChecked=110, Total=3306 [2024-09-20 13:15:47,330 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 16 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.6s IncrementalHoareTripleChecker+Time [2024-09-20 13:15:47,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 206 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 587 Invalid, 11 Unknown, 0 Unchecked, 37.6s Time] [2024-09-20 13:15:47,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-20 13:15:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2024-09-20 13:15:47,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 80 states have internal predecessors, (85), 21 states have call successors, (21), 18 states have call predecessors, (21), 20 states have return successors, (37), 18 states have call predecessors, (37), 19 states have call successors, (37) [2024-09-20 13:15:47,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 143 transitions. [2024-09-20 13:15:47,386 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 143 transitions. Word has length 47 [2024-09-20 13:15:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:15:47,386 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 143 transitions. [2024-09-20 13:15:47,386 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 8 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 13:15:47,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:47,386 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 143 transitions. [2024-09-20 13:15:47,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:15:47,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:15:47,387 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] [2024-09-20 13:15:47,395 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 13:15:47,588 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:47,588 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:15:47,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:15:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash 992478086, now seen corresponding path program 4 times [2024-09-20 13:15:47,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:15:47,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731038711] [2024-09-20 13:15:47,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:15:47,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:15:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:15:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1306799415] [2024-09-20 13:15:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 13:15:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:15:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:15:47,683 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:15:47,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:15:48,026 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 13:15:48,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:15:48,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 227 conjuncts are in the unsatisfiable core [2024-09-20 13:15:48,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:15:48,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:15:48,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:15:48,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:15:48,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:15:48,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:15:48,688 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-20 13:15:48,688 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 [2024-09-20 13:15:48,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:15:48,795 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-20 13:15:48,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 43 [2024-09-20 13:15:48,838 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-20 13:15:48,838 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 [2024-09-20 13:15:49,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:15:49,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:15:49,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:15:49,744 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-20 13:15:49,744 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 86 treesize of output 96 [2024-09-20 13:15:50,369 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:50,369 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 168 treesize of output 296 [2024-09-20 13:15:50,474 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:15:50,475 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 216 treesize of output 296 [2024-09-20 13:15:51,536 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 13:15:51,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731038711] [2024-09-20 13:16:09,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:09,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306799415] [2024-09-20 13:16:09,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306799415] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:09,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:09,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-20 13:16:09,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344724166] [2024-09-20 13:16:09,107 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:09,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 13:16:09,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 13:16:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1216, Unknown=3, NotChecked=0, Total=1332 [2024-09-20 13:16:09,109 INFO L87 Difference]: Start difference. First operand 117 states and 143 transitions. Second operand has 25 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:16:11,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:11,856 INFO L93 Difference]: Finished difference Result 180 states and 220 transitions. [2024-09-20 13:16:11,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 13:16:11,857 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2024-09-20 13:16:11,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:11,858 INFO L225 Difference]: With dead ends: 180 [2024-09-20 13:16:11,859 INFO L226 Difference]: Without dead ends: 176 [2024-09-20 13:16:11,859 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=178, Invalid=1711, Unknown=3, NotChecked=0, Total=1892 [2024-09-20 13:16:11,860 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:11,860 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 573 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1105 Invalid, 3 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 13:16:11,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-20 13:16:11,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 163. [2024-09-20 13:16:11,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 106 states have (on average 1.1320754716981132) internal successors, (120), 111 states have internal predecessors, (120), 28 states have call successors, (28), 25 states have call predecessors, (28), 28 states have return successors, (51), 26 states have call predecessors, (51), 25 states have call successors, (51) [2024-09-20 13:16:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 199 transitions. [2024-09-20 13:16:11,941 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 199 transitions. Word has length 58 [2024-09-20 13:16:11,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:11,941 INFO L474 AbstractCegarLoop]: Abstraction has 163 states and 199 transitions. [2024-09-20 13:16:11,941 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:16:11,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:11,941 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 199 transitions. [2024-09-20 13:16:11,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 13:16:11,942 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:11,943 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:16:11,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:12,143 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:16:12,144 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:12,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:12,144 INFO L85 PathProgramCache]: Analyzing trace with hash 183131460, now seen corresponding path program 2 times [2024-09-20 13:16:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324367245] [2024-09-20 13:16:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:12,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:12,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [183455302] [2024-09-20 13:16:12,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:16:12,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:12,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:12,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:16:12,245 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 13:16:12,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:16:12,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:12,674 WARN L260 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 250 conjuncts are in the unsatisfiable core [2024-09-20 13:16:12,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:12,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:12,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:12,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:12,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:13,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:13,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:13,724 INFO L349 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2024-09-20 13:16:13,725 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 [2024-09-20 13:16:13,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:13,814 INFO L349 Elim1Store]: treesize reduction 29, result has 34.1 percent of original size [2024-09-20 13:16:13,814 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 [2024-09-20 13:16:13,845 INFO L349 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2024-09-20 13:16:13,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 56 [2024-09-20 13:16:14,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:14,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:15,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:15,270 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 103 treesize of output 143 [2024-09-20 13:16:15,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:15,332 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 68 treesize of output 160 [2024-09-20 13:16:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 13:16:15,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:16:30,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:16:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324367245] [2024-09-20 13:16:30,702 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-20 13:16:30,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183455302] [2024-09-20 13:16:30,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183455302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:16:30,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:16:30,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2024-09-20 13:16:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141111412] [2024-09-20 13:16:30,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-20 13:16:30,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 13:16:30,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:16:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 13:16:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1364, Unknown=2, NotChecked=0, Total=1482 [2024-09-20 13:16:30,704 INFO L87 Difference]: Start difference. First operand 163 states and 199 transitions. Second operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:16:39,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:47,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 13:16:51,687 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] [2024-09-20 13:16:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:16:54,163 INFO L93 Difference]: Finished difference Result 226 states and 276 transitions. [2024-09-20 13:16:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 13:16:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 58 [2024-09-20 13:16:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:16:54,165 INFO L225 Difference]: With dead ends: 226 [2024-09-20 13:16:54,165 INFO L226 Difference]: Without dead ends: 179 [2024-09-20 13:16:54,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=214, Invalid=2332, Unknown=4, NotChecked=0, Total=2550 [2024-09-20 13:16:54,167 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 43 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 16 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2024-09-20 13:16:54,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 436 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1094 Invalid, 3 Unknown, 0 Unchecked, 13.8s Time] [2024-09-20 13:16:54,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-20 13:16:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 175. [2024-09-20 13:16:54,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 114 states have (on average 1.1228070175438596) internal successors, (128), 120 states have internal predecessors, (128), 30 states have call successors, (30), 27 states have call predecessors, (30), 30 states have return successors, (55), 27 states have call predecessors, (55), 27 states have call successors, (55) [2024-09-20 13:16:54,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 213 transitions. [2024-09-20 13:16:54,252 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 213 transitions. Word has length 58 [2024-09-20 13:16:54,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:16:54,252 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 213 transitions. [2024-09-20 13:16:54,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 9 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 13:16:54,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:54,252 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 213 transitions. [2024-09-20 13:16:54,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 13:16:54,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:16:54,253 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:16:54,265 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 13:16:54,454 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 13:16:54,454 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:16:54,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:16:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2056886675, now seen corresponding path program 5 times [2024-09-20 13:16:54,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:16:54,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925574428] [2024-09-20 13:16:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:16:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:16:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-20 13:16:54,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553222513] [2024-09-20 13:16:54,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 13:16:54,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:16:54,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:16:54,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:16:54,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 13:16:55,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 13:16:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:16:55,182 WARN L260 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 295 conjuncts are in the unsatisfiable core [2024-09-20 13:16:55,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:16:55,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-20 13:16:55,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:55,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-09-20 13:16:55,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-20 13:16:55,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:56,351 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2024-09-20 13:16:56,351 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 [2024-09-20 13:16:56,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:56,466 INFO L349 Elim1Store]: treesize reduction 14, result has 58.8 percent of original size [2024-09-20 13:16:56,466 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 [2024-09-20 13:16:56,514 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2024-09-20 13:16:56,514 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 [2024-09-20 13:16:57,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:57,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:57,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-09-20 13:16:57,605 INFO L349 Elim1Store]: treesize reduction 36, result has 52.0 percent of original size [2024-09-20 13:16:57,605 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 [2024-09-20 13:16:58,266 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:58,266 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 160 treesize of output 296 [2024-09-20 13:16:58,364 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 13:16:58,365 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 150 treesize of output 238 [2024-09-20 13:16:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 13:16:59,741 INFO L327 TraceCheckSpWp]: Computing backward predicates...