./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_05.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 ca4ee3dd 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/loops/eureka_05.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 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab --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-ca4ee3d-m [2024-09-20 18:40:31,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:40:32,043 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:40:32,047 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:40:32,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:40:32,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:40:32,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:40:32,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:40:32,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:40:32,084 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:40:32,084 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:40:32,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:40:32,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:40:32,087 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:40:32,087 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:40:32,088 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:40:32,088 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:40:32,088 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:40:32,089 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:40:32,089 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:40:32,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:40:32,092 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:40:32,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:40:32,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:40:32,093 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:40:32,093 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:40:32,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:40:32,094 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:40:32,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:40:32,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:40:32,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:40:32,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:40:32,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:32,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:40:32,096 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:40:32,096 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:40:32,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:40:32,097 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:40:32,097 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:40:32,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:40:32,098 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:40:32,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:40:32,099 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3f12ca1e314a03dfb1c8beadd0c1a180c2d2339dd5f3109d5999df06d52395ab Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:40:32,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:40:32,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:40:32,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:40:32,381 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:40:32,382 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:40:32,383 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_05.i [2024-09-20 18:40:33,864 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:40:34,060 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:40:34,061 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_05.i [2024-09-20 18:40:34,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1f3081f84/f336a397841b4074a630893ed41c9093/FLAGf9b6144da [2024-09-20 18:40:34,083 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1f3081f84/f336a397841b4074a630893ed41c9093 [2024-09-20 18:40:34,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:40:34,087 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:40:34,090 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:34,090 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:40:34,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:40:34,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2167a238 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,118 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:40:34,274 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/loops/eureka_05.i[810,823] [2024-09-20 18:40:34,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:34,318 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:40:34,330 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/loops/eureka_05.i[810,823] [2024-09-20 18:40:34,345 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:34,375 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:40:34,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34 WrapperNode [2024-09-20 18:40:34,376 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:34,377 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:34,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:40:34,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:40:34,385 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,396 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,407 INFO L138 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:40:34,408 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:34,409 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:40:34,409 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:40:34,409 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:40:34,420 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,420 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,422 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,442 INFO L175 MemorySlicer]: Split 15 memory accesses to 3 slices as follows [2, 2, 11]. 73 percent of accesses are in the largest equivalence class. The 7 initializations are split as follows [2, 0, 5]. The 3 writes are split as follows [0, 1, 2]. [2024-09-20 18:40:34,443 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,455 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,461 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,464 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,466 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,472 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:40:34,473 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:40:34,474 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:40:34,474 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:40:34,476 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:34,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:34,511 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 18:40:34,514 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 18:40:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:40:34,557 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:40:34,557 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 18:40:34,558 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:40:34,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:40:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure SelectionSort [2024-09-20 18:40:34,559 INFO L138 BoogieDeclarations]: Found implementation of procedure SelectionSort [2024-09-20 18:40:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:40:34,559 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:40:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 18:40:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 18:40:34,559 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 18:40:34,560 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:40:34,560 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:40:34,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 18:40:34,637 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:40:34,640 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:40:34,805 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-09-20 18:40:34,806 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:40:34,838 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:40:34,838 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-20 18:40:34,838 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34 BoogieIcfgContainer [2024-09-20 18:40:34,839 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:40:34,841 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:40:34,841 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:40:34,844 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:40:34,844 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:40:34" (1/3) ... [2024-09-20 18:40:34,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2970a533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (2/3) ... [2024-09-20 18:40:34,845 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2970a533 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,845 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34" (3/3) ... [2024-09-20 18:40:34,847 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_05.i [2024-09-20 18:40:34,862 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:40:34,862 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:40:34,915 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:40:34,922 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;@31504d71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:40:34,922 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:40:34,928 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:40:34,952 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:34,954 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 18:40:34,955 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:34,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2080310768, now seen corresponding path program 1 times [2024-09-20 18:40:34,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:34,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430611880] [2024-09-20 18:40:34,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,260 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 18:40:35,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430611880] [2024-09-20 18:40:35,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430611880] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:35,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:35,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:40:35,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667022179] [2024-09-20 18:40:35,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,269 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:40:35,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:40:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:40:35,302 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 20 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:40:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,533 INFO L93 Difference]: Finished difference Result 65 states and 92 transitions. [2024-09-20 18:40:35,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:40:35,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 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 18:40:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,545 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:40:35,546 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 18:40:35,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:40:35,555 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,556 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 7 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 18:40:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 25. [2024-09-20 18:40:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-20 18:40:35,609 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 17 [2024-09-20 18:40:35,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,610 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-20 18:40:35,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 18:40:35,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,612 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-20 18:40:35,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:40:35,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,614 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 18:40:35,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:40:35,615 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:35,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,619 INFO L85 PathProgramCache]: Analyzing trace with hash 156377847, now seen corresponding path program 1 times [2024-09-20 18:40:35,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:35,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707580734] [2024-09-20 18:40:35,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,771 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 18:40:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707580734] [2024-09-20 18:40:35,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707580734] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:35,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:35,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:40:35,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584299515] [2024-09-20 18:40:35,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,777 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:40:35,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:40:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:40:35,781 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:35,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,972 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2024-09-20 18:40:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:40:35,973 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-20 18:40:35,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,974 INFO L225 Difference]: With dead ends: 56 [2024-09-20 18:40:35,975 INFO L226 Difference]: Without dead ends: 37 [2024-09-20 18:40:35,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:40:35,977 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,978 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 5 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-20 18:40:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 26. [2024-09-20 18:40:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2024-09-20 18:40:35,997 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2024-09-20 18:40:35,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,997 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2024-09-20 18:40:35,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:35,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2024-09-20 18:40:35,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-20 18:40:35,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,999 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 18:40:36,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:40:36,000 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:36,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash 364897058, now seen corresponding path program 1 times [2024-09-20 18:40:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:36,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097375565] [2024-09-20 18:40:36,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:36,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-20 18:40:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:36,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097375565] [2024-09-20 18:40:36,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097375565] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:36,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350609147] [2024-09-20 18:40:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:36,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:36,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:36,118 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 18:40:36,120 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 18:40:36,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-20 18:40:36,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:36,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350609147] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:36,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:36,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-09-20 18:40:36,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570195734] [2024-09-20 18:40:36,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:36,263 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:40:36,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:36,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:40:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:40:36,264 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:40:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:36,490 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-20 18:40:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 18:40:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2024-09-20 18:40:36,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:36,492 INFO L225 Difference]: With dead ends: 65 [2024-09-20 18:40:36,492 INFO L226 Difference]: Without dead ends: 46 [2024-09-20 18:40:36,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:40:36,494 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 66 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:36,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 7 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:36,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-20 18:40:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2024-09-20 18:40:36,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:36,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-09-20 18:40:36,505 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2024-09-20 18:40:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:36,505 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-09-20 18:40:36,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-20 18:40:36,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:36,506 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-09-20 18:40:36,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:40:36,507 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:36,507 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:36,521 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:36,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:36,708 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:36,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:36,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1764338249, now seen corresponding path program 2 times [2024-09-20 18:40:36,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:36,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950072764] [2024-09-20 18:40:36,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:36,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:40:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950072764] [2024-09-20 18:40:36,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950072764] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:36,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:36,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 18:40:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411889521] [2024-09-20 18:40:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:36,882 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:40:36,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:40:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:40:36,888 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:37,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:37,063 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2024-09-20 18:40:37,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:40:37,063 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2024-09-20 18:40:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:37,065 INFO L225 Difference]: With dead ends: 46 [2024-09-20 18:40:37,066 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 18:40:37,067 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:40:37,069 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:37,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 7 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 18:40:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-09-20 18:40:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-09-20 18:40:37,086 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2024-09-20 18:40:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:37,087 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-09-20 18:40:37,087 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:37,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,088 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-09-20 18:40:37,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 18:40:37,088 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:37,088 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:37,089 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 18:40:37,090 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:37,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1674322940, now seen corresponding path program 1 times [2024-09-20 18:40:37,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:37,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074848846] [2024-09-20 18:40:37,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:37,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:37,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:40:37,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074848846] [2024-09-20 18:40:37,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074848846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620461707] [2024-09-20 18:40:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:37,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:37,252 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 18:40:37,253 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 18:40:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:40:37,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:37,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:40:37,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620461707] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:37,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:37,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-09-20 18:40:37,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895253187] [2024-09-20 18:40:37,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:37,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:40:37,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:37,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:40:37,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:40:37,464 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:37,996 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2024-09-20 18:40:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:40:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2024-09-20 18:40:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:37,998 INFO L225 Difference]: With dead ends: 70 [2024-09-20 18:40:37,998 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 18:40:37,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:40:38,000 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 109 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:38,000 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 13 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:38,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 18:40:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2024-09-20 18:40:38,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-20 18:40:38,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-20 18:40:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:38,018 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-20 18:40:38,018 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:38,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-20 18:40:38,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:40:38,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:38,020 INFO L216 NwaCegarLoop]: trace histogram [5, 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 18:40:38,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:40:38,224 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:38,225 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:38,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:38,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2009987497, now seen corresponding path program 1 times [2024-09-20 18:40:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:38,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732304541] [2024-09-20 18:40:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:38,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:40:38,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732304541] [2024-09-20 18:40:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732304541] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821766720] [2024-09-20 18:40:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:38,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:38,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:38,381 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 18:40:38,382 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 18:40:38,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:38,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-20 18:40:38,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:40:38,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:40:38,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821766720] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:38,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:38,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2024-09-20 18:40:38,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608672206] [2024-09-20 18:40:38,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:38,676 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:40:38,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:38,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:40:38,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:40:38,680 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:39,253 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2024-09-20 18:40:39,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:40:39,254 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-09-20 18:40:39,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:39,255 INFO L225 Difference]: With dead ends: 83 [2024-09-20 18:40:39,256 INFO L226 Difference]: Without dead ends: 66 [2024-09-20 18:40:39,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:40:39,257 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 290 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:39,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 13 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-20 18:40:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2024-09-20 18:40:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-20 18:40:39,282 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 28 [2024-09-20 18:40:39,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:39,282 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-20 18:40:39,282 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:39,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-20 18:40:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 18:40:39,284 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:39,284 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:39,301 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:40:39,485 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:40:39,485 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:39,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:39,486 INFO L85 PathProgramCache]: Analyzing trace with hash 752690779, now seen corresponding path program 2 times [2024-09-20 18:40:39,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:39,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945456930] [2024-09-20 18:40:39,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:39,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:39,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:39,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:39,749 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 18:40:39,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945456930] [2024-09-20 18:40:39,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945456930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:39,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123156830] [2024-09-20 18:40:39,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:40:39,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:39,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:39,752 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 18:40:39,754 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 18:40:39,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:40:39,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:39,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 18:40:39,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 18:40:40,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 18:40:40,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123156830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:40,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:40,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 19 [2024-09-20 18:40:40,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402304466] [2024-09-20 18:40:40,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:40,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 18:40:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 18:40:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:40:40,338 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:40,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:40,621 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2024-09-20 18:40:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 18:40:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 58 [2024-09-20 18:40:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:40,623 INFO L225 Difference]: With dead ends: 84 [2024-09-20 18:40:40,623 INFO L226 Difference]: Without dead ends: 72 [2024-09-20 18:40:40,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2024-09-20 18:40:40,624 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 137 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:40,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 8 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:40,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-20 18:40:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-20 18:40:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.296875) internal successors, (83), 64 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2024-09-20 18:40:40,644 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 58 [2024-09-20 18:40:40,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:40,644 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2024-09-20 18:40:40,645 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.0) internal successors, (76), 16 states have internal predecessors, (76), 4 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:40,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,645 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2024-09-20 18:40:40,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-20 18:40:40,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:40,649 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:40,667 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 18:40:40,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:40,850 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:40,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1101248827, now seen corresponding path program 3 times [2024-09-20 18:40:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235742266] [2024-09-20 18:40:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:40,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:40,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 18:40:41,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235742266] [2024-09-20 18:40:41,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235742266] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:41,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787701794] [2024-09-20 18:40:41,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:40:41,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:41,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:41,122 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 18:40:41,123 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 18:40:41,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 18:40:41,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:41,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:40:41,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:41,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:40:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2024-09-20 18:40:41,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:40:41,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787701794] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:40:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2024-09-20 18:40:41,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349617131] [2024-09-20 18:40:41,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:41,566 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:40:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:41,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:40:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:40:41,568 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:41,741 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2024-09-20 18:40:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:40:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2024-09-20 18:40:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:41,743 INFO L225 Difference]: With dead ends: 81 [2024-09-20 18:40:41,744 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 18:40:41,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:40:41,745 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:41,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 107 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 18:40:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2024-09-20 18:40:41,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 69 states have internal predecessors, (87), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2024-09-20 18:40:41,770 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 64 [2024-09-20 18:40:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:41,770 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 96 transitions. [2024-09-20 18:40:41,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 18:40:41,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions. [2024-09-20 18:40:41,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-20 18:40:41,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:41,772 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:41,790 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:41,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 18:40:41,973 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:41,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:41,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2042194420, now seen corresponding path program 1 times [2024-09-20 18:40:41,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:41,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732765903] [2024-09-20 18:40:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:41,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-20 18:40:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,252 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 2 proven. 147 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 18:40:42,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732765903] [2024-09-20 18:40:42,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732765903] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:42,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385329252] [2024-09-20 18:40:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:42,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:42,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:42,256 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 18:40:42,271 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 18:40:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 18:40:42,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 27 proven. 120 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:40:42,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 29 proven. 120 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 18:40:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385329252] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:42,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:42,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 21 [2024-09-20 18:40:42,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55875550] [2024-09-20 18:40:42,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:42,874 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:40:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:42,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:40:42,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=320, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:40:42,875 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. Second operand has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:43,324 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2024-09-20 18:40:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:40:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 71 [2024-09-20 18:40:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:43,327 INFO L225 Difference]: With dead ends: 106 [2024-09-20 18:40:43,327 INFO L226 Difference]: Without dead ends: 81 [2024-09-20 18:40:43,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 18:40:43,329 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 168 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:43,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 10 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-20 18:40:43,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2024-09-20 18:40:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 70 states have internal predecessors, (88), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:43,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-20 18:40:43,367 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 71 [2024-09-20 18:40:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:43,367 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-20 18:40:43,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.238095238095238) internal successors, (89), 19 states have internal predecessors, (89), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 18:40:43,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:43,368 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-20 18:40:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 18:40:43,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:43,374 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:43,392 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:40:43,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:43,575 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:43,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:43,575 INFO L85 PathProgramCache]: Analyzing trace with hash 2083039638, now seen corresponding path program 2 times [2024-09-20 18:40:43,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:43,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671450168] [2024-09-20 18:40:43,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:43,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:44,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:44,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:44,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:44,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:40:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-20 18:40:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671450168] [2024-09-20 18:40:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671450168] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775166245] [2024-09-20 18:40:44,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:40:44,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:44,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:44,533 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 18:40:44,535 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 18:40:44,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:40:44,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:44,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 18:40:44,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:44,744 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:44,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 18:40:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2024-09-20 18:40:45,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-20 18:40:45,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775166245] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:45,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:45,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2024-09-20 18:40:45,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409211726] [2024-09-20 18:40:45,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:45,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 18:40:45,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 18:40:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2024-09-20 18:40:45,497 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 18:40:46,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:46,086 INFO L93 Difference]: Finished difference Result 153 states and 187 transitions. [2024-09-20 18:40:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 18:40:46,087 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 74 [2024-09-20 18:40:46,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:46,088 INFO L225 Difference]: With dead ends: 153 [2024-09-20 18:40:46,088 INFO L226 Difference]: Without dead ends: 93 [2024-09-20 18:40:46,090 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=313, Invalid=1327, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:40:46,090 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 135 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:46,091 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 4 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-20 18:40:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 82. [2024-09-20 18:40:46,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 73 states have internal predecessors, (91), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2024-09-20 18:40:46,125 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 74 [2024-09-20 18:40:46,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:46,125 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2024-09-20 18:40:46,125 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 26 states have internal predecessors, (75), 5 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-20 18:40:46,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2024-09-20 18:40:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 18:40:46,127 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:46,127 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:46,144 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:40:46,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:46,328 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:46,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:46,329 INFO L85 PathProgramCache]: Analyzing trace with hash 2123714388, now seen corresponding path program 1 times [2024-09-20 18:40:46,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:46,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280677621] [2024-09-20 18:40:46,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:46,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:46,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:46,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:46,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:47,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:40:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 119 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-20 18:40:47,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:47,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280677621] [2024-09-20 18:40:47,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280677621] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948460840] [2024-09-20 18:40:47,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:47,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:47,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:47,960 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 18:40:47,961 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 18:40:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:48,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-20 18:40:48,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:48,170 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:48,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 18:40:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-20 18:40:49,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948460840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:49,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:40:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2024-09-20 18:40:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156143419] [2024-09-20 18:40:49,361 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:49,361 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 18:40:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:49,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 18:40:49,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 18:40:49,363 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:40:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:52,912 INFO L93 Difference]: Finished difference Result 308 states and 421 transitions. [2024-09-20 18:40:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-20 18:40:52,912 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-09-20 18:40:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:52,914 INFO L225 Difference]: With dead ends: 308 [2024-09-20 18:40:52,914 INFO L226 Difference]: Without dead ends: 251 [2024-09-20 18:40:52,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2327 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1277, Invalid=7465, Unknown=0, NotChecked=0, Total=8742 [2024-09-20 18:40:52,917 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 255 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:52,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 17 Invalid, 1312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:40:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-20 18:40:53,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 177. [2024-09-20 18:40:53,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 167 states have (on average 1.4191616766467066) internal successors, (237), 168 states have internal predecessors, (237), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:40:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 246 transitions. [2024-09-20 18:40:53,002 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 246 transitions. Word has length 74 [2024-09-20 18:40:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:53,002 INFO L474 AbstractCegarLoop]: Abstraction has 177 states and 246 transitions. [2024-09-20 18:40:53,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 34 states have internal predecessors, (73), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:40:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 246 transitions. [2024-09-20 18:40:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 18:40:53,004 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:53,004 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:53,018 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:53,204 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:53,204 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1727352234, now seen corresponding path program 2 times [2024-09-20 18:40:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339126106] [2024-09-20 18:40:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:53,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:53,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:53,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:40:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:55,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:40:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 78 proven. 135 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 18:40:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339126106] [2024-09-20 18:40:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339126106] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879525841] [2024-09-20 18:40:55,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:40:55,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:55,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:55,509 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 18:40:55,511 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 18:40:55,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:40:55,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:40:55,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:40:55,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:55,700 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:40:55,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 18:40:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-09-20 18:40:56,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:56,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879525841] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:56,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:40:56,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 13] total 42 [2024-09-20 18:40:56,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939203414] [2024-09-20 18:40:56,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:56,533 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 18:40:56,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:56,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 18:40:56,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1631, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 18:40:56,534 INFO L87 Difference]: Start difference. First operand 177 states and 246 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:41:01,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:01,331 INFO L93 Difference]: Finished difference Result 532 states and 764 transitions. [2024-09-20 18:41:01,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 18:41:01,332 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 74 [2024-09-20 18:41:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:01,336 INFO L225 Difference]: With dead ends: 532 [2024-09-20 18:41:01,336 INFO L226 Difference]: Without dead ends: 374 [2024-09-20 18:41:01,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4558 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2068, Invalid=12938, Unknown=0, NotChecked=0, Total=15006 [2024-09-20 18:41:01,344 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 461 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 1346 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:01,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 22 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1346 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:41:01,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-09-20 18:41:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 269. [2024-09-20 18:41:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 259 states have (on average 1.4517374517374517) internal successors, (376), 260 states have internal predecessors, (376), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:41:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 385 transitions. [2024-09-20 18:41:01,491 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 385 transitions. Word has length 74 [2024-09-20 18:41:01,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:01,491 INFO L474 AbstractCegarLoop]: Abstraction has 269 states and 385 transitions. [2024-09-20 18:41:01,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 39 states have internal predecessors, (84), 4 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:41:01,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:01,492 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 385 transitions. [2024-09-20 18:41:01,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-20 18:41:01,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:01,493 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 7, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:01,512 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:41:01,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 18:41:01,698 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:01,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1688407464, now seen corresponding path program 3 times [2024-09-20 18:41:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:01,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214708919] [2024-09-20 18:41:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:02,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:02,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:04,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 9 proven. 204 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 18:41:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214708919] [2024-09-20 18:41:04,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214708919] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305024461] [2024-09-20 18:41:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:41:04,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:04,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:04,189 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 18:41:04,190 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 18:41:04,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:41:04,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:04,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:41:04,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:04,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-20 18:41:04,317 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 30 treesize of output 29 [2024-09-20 18:41:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-20 18:41:04,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:05,137 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-20 18:41:05,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305024461] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:05,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:05,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11, 10] total 49 [2024-09-20 18:41:05,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839619469] [2024-09-20 18:41:05,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:05,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 18:41:05,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:05,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 18:41:05,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2151, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 18:41:05,140 INFO L87 Difference]: Start difference. First operand 269 states and 385 transitions. Second operand has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:41:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:09,221 INFO L93 Difference]: Finished difference Result 466 states and 651 transitions. [2024-09-20 18:41:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-09-20 18:41:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 74 [2024-09-20 18:41:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:09,224 INFO L225 Difference]: With dead ends: 466 [2024-09-20 18:41:09,224 INFO L226 Difference]: Without dead ends: 416 [2024-09-20 18:41:09,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 137 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1199, Invalid=10791, Unknown=0, NotChecked=0, Total=11990 [2024-09-20 18:41:09,228 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 240 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:09,229 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 20 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:41:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2024-09-20 18:41:09,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 319. [2024-09-20 18:41:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 307 states have (on average 1.4234527687296417) internal successors, (437), 308 states have internal predecessors, (437), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:09,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 448 transitions. [2024-09-20 18:41:09,407 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 448 transitions. Word has length 74 [2024-09-20 18:41:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:09,407 INFO L474 AbstractCegarLoop]: Abstraction has 319 states and 448 transitions. [2024-09-20 18:41:09,408 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.106382978723404) internal successors, (99), 46 states have internal predecessors, (99), 9 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:41:09,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 448 transitions. [2024-09-20 18:41:09,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:41:09,409 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:09,410 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:09,421 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 18:41:09,610 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 18:41:09,611 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:09,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:09,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1248576269, now seen corresponding path program 4 times [2024-09-20 18:41:09,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:09,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790423657] [2024-09-20 18:41:09,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:09,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:09,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:10,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:10,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:10,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:11,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:11,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:41:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:11,049 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2024-09-20 18:41:11,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790423657] [2024-09-20 18:41:11,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790423657] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:11,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678211125] [2024-09-20 18:41:11,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:41:11,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:11,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:11,052 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 18:41:11,054 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 18:41:11,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:41:11,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:11,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 18:41:11,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:11,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:11,353 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 1 case distinctions, treesize of input 26 treesize of output 17 [2024-09-20 18:41:11,602 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:11,602 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 3 case distinctions, treesize of input 48 treesize of output 33 [2024-09-20 18:41:11,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:11,747 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 3 case distinctions, treesize of input 48 treesize of output 33 [2024-09-20 18:41:11,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:11,818 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 36 treesize of output 12 [2024-09-20 18:41:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 49 proven. 165 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:41:11,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 145 proven. 51 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 18:41:12,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678211125] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:12,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:12,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 14] total 51 [2024-09-20 18:41:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60799806] [2024-09-20 18:41:12,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:12,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-20 18:41:12,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:12,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-20 18:41:12,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2370, Unknown=0, NotChecked=0, Total=2550 [2024-09-20 18:41:12,346 INFO L87 Difference]: Start difference. First operand 319 states and 448 transitions. Second operand has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:41:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:21,371 INFO L93 Difference]: Finished difference Result 1288 states and 1838 transitions. [2024-09-20 18:41:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2024-09-20 18:41:21,372 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2024-09-20 18:41:21,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:21,376 INFO L225 Difference]: With dead ends: 1288 [2024-09-20 18:41:21,376 INFO L226 Difference]: Without dead ends: 1023 [2024-09-20 18:41:21,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11173 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2783, Invalid=29797, Unknown=0, NotChecked=0, Total=32580 [2024-09-20 18:41:21,382 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 844 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:21,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 26 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-20 18:41:21,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2024-09-20 18:41:21,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 568. [2024-09-20 18:41:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 556 states have (on average 1.4550359712230216) internal successors, (809), 557 states have internal predecessors, (809), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:21,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 820 transitions. [2024-09-20 18:41:21,724 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 820 transitions. Word has length 81 [2024-09-20 18:41:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:21,724 INFO L474 AbstractCegarLoop]: Abstraction has 568 states and 820 transitions. [2024-09-20 18:41:21,724 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4705882352941178) internal successors, (126), 49 states have internal predecessors, (126), 3 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:41:21,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 820 transitions. [2024-09-20 18:41:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:41:21,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:21,726 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:21,742 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 18:41:21,927 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:41:21,927 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:21,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1736737935, now seen corresponding path program 5 times [2024-09-20 18:41:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:21,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139494546] [2024-09-20 18:41:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:22,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:22,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:22,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:23,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:23,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:41:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:23,260 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 82 proven. 133 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 18:41:23,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:23,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139494546] [2024-09-20 18:41:23,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139494546] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:23,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467778734] [2024-09-20 18:41:23,261 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:41:23,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:23,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:23,262 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:23,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:41:23,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 18:41:23,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:23,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 18:41:23,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:23,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:23,621 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 3 case distinctions, treesize of input 65 treesize of output 41 [2024-09-20 18:41:23,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:23,743 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 12 [2024-09-20 18:41:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 148 proven. 46 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 18:41:23,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:24,373 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 109 treesize of output 93 [2024-09-20 18:41:24,418 INFO L349 Elim1Store]: treesize reduction 13, result has 80.0 percent of original size [2024-09-20 18:41:24,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 113 treesize of output 112 [2024-09-20 18:41:24,641 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 158 proven. 30 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-20 18:41:24,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467778734] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:24,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:24,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 16, 14] total 54 [2024-09-20 18:41:24,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509001141] [2024-09-20 18:41:24,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:24,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 18:41:24,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 18:41:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2593, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:41:24,644 INFO L87 Difference]: Start difference. First operand 568 states and 820 transitions. Second operand has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:41:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:35,064 INFO L93 Difference]: Finished difference Result 1950 states and 2785 transitions. [2024-09-20 18:41:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2024-09-20 18:41:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 81 [2024-09-20 18:41:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:35,071 INFO L225 Difference]: With dead ends: 1950 [2024-09-20 18:41:35,071 INFO L226 Difference]: Without dead ends: 1648 [2024-09-20 18:41:35,075 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15196 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4514, Invalid=40218, Unknown=0, NotChecked=0, Total=44732 [2024-09-20 18:41:35,075 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 333 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:35,076 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 34 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-20 18:41:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2024-09-20 18:41:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1046. [2024-09-20 18:41:35,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1034 states have (on average 1.369439071566731) internal successors, (1416), 1035 states have internal predecessors, (1416), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:35,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1427 transitions. [2024-09-20 18:41:35,755 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1427 transitions. Word has length 81 [2024-09-20 18:41:35,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:35,755 INFO L474 AbstractCegarLoop]: Abstraction has 1046 states and 1427 transitions. [2024-09-20 18:41:35,755 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.037037037037037) internal successors, (110), 52 states have internal predecessors, (110), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 18:41:35,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:35,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1427 transitions. [2024-09-20 18:41:35,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:41:35,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:35,758 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:35,774 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 18:41:35,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:41:35,959 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:35,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:35,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1342371149, now seen corresponding path program 6 times [2024-09-20 18:41:35,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:35,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249215181] [2024-09-20 18:41:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:35,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:36,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:36,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:36,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:36,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:41:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 126 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 18:41:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249215181] [2024-09-20 18:41:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249215181] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988247626] [2024-09-20 18:41:36,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:41:36,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:36,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:36,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:41:36,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:41:36,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:36,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:41:36,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:36,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:36,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 10 [2024-09-20 18:41:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-20 18:41:37,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:37,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988247626] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:37,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:41:37,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2024-09-20 18:41:37,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125935492] [2024-09-20 18:41:37,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:37,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 18:41:37,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:37,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 18:41:37,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:41:37,175 INFO L87 Difference]: Start difference. First operand 1046 states and 1427 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:41:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:38,931 INFO L93 Difference]: Finished difference Result 2690 states and 3701 transitions. [2024-09-20 18:41:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 18:41:38,931 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2024-09-20 18:41:38,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:38,936 INFO L225 Difference]: With dead ends: 2690 [2024-09-20 18:41:38,936 INFO L226 Difference]: Without dead ends: 790 [2024-09-20 18:41:38,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 18:41:38,940 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 129 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:38,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 5 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:41:38,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2024-09-20 18:41:39,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 790. [2024-09-20 18:41:39,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 778 states have (on average 1.3907455012853471) internal successors, (1082), 779 states have internal predecessors, (1082), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:39,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 1093 transitions. [2024-09-20 18:41:39,470 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 1093 transitions. Word has length 81 [2024-09-20 18:41:39,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:39,470 INFO L474 AbstractCegarLoop]: Abstraction has 790 states and 1093 transitions. [2024-09-20 18:41:39,470 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 19 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:41:39,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 1093 transitions. [2024-09-20 18:41:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:41:39,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:39,473 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 6, 5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:39,490 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 18:41:39,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:41:39,678 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:39,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1136122385, now seen corresponding path program 7 times [2024-09-20 18:41:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:39,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346327708] [2024-09-20 18:41:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:39,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:39,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:39,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:40,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:40,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:41:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 46 proven. 136 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-20 18:41:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346327708] [2024-09-20 18:41:40,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346327708] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384149404] [2024-09-20 18:41:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:41:40,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:40,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:40,716 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:40,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:41:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:40,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 18:41:40,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:41,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:41,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 27 [2024-09-20 18:41:41,231 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:41,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2024-09-20 18:41:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 49 proven. 134 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2024-09-20 18:41:41,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:41,504 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 109 treesize of output 93 [2024-09-20 18:41:41,554 INFO L349 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2024-09-20 18:41:41,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 105 treesize of output 112 [2024-09-20 18:41:41,729 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 130 proven. 9 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2024-09-20 18:41:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384149404] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:41,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:41,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14, 10] total 42 [2024-09-20 18:41:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113248490] [2024-09-20 18:41:41,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:41,730 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 18:41:41,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 18:41:41,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1578, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 18:41:41,731 INFO L87 Difference]: Start difference. First operand 790 states and 1093 transitions. Second operand has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 18:41:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:45,024 INFO L93 Difference]: Finished difference Result 1707 states and 2354 transitions. [2024-09-20 18:41:45,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-20 18:41:45,025 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 81 [2024-09-20 18:41:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:45,032 INFO L225 Difference]: With dead ends: 1707 [2024-09-20 18:41:45,032 INFO L226 Difference]: Without dead ends: 1040 [2024-09-20 18:41:45,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2314 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=869, Invalid=7687, Unknown=0, NotChecked=0, Total=8556 [2024-09-20 18:41:45,035 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 302 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:45,036 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 15 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:41:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2024-09-20 18:41:45,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 863. [2024-09-20 18:41:45,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 851 states have (on average 1.3748531139835487) internal successors, (1170), 852 states have internal predecessors, (1170), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:41:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 1181 transitions. [2024-09-20 18:41:45,719 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 1181 transitions. Word has length 81 [2024-09-20 18:41:45,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:45,720 INFO L474 AbstractCegarLoop]: Abstraction has 863 states and 1181 transitions. [2024-09-20 18:41:45,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5714285714285716) internal successors, (108), 40 states have internal predecessors, (108), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-20 18:41:45,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:45,721 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 1181 transitions. [2024-09-20 18:41:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:41:45,723 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:45,723 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:41:45,741 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 18:41:45,924 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:41:45,924 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:45,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:45,924 INFO L85 PathProgramCache]: Analyzing trace with hash 2052240977, now seen corresponding path program 8 times [2024-09-20 18:41:45,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:45,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268710611] [2024-09-20 18:41:45,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:45,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:46,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:46,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:41:46,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:47,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:41:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:47,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:41:47,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 9 proven. 202 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 18:41:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268710611] [2024-09-20 18:41:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268710611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433571738] [2024-09-20 18:41:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:41:47,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:47,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:47,508 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:47,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:41:47,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:41:47,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:47,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 18:41:47,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:47,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:47,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 18:41:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:41:48,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:49,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433571738] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:49,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:41:49,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20] total 44 [2024-09-20 18:41:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988155055] [2024-09-20 18:41:49,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:49,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:41:49,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:49,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:41:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1802, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:41:49,089 INFO L87 Difference]: Start difference. First operand 863 states and 1181 transitions. Second operand has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:42:02,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:42:02,744 INFO L93 Difference]: Finished difference Result 3464 states and 4829 transitions. [2024-09-20 18:42:02,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-20 18:42:02,745 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2024-09-20 18:42:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:42:02,754 INFO L225 Difference]: With dead ends: 3464 [2024-09-20 18:42:02,754 INFO L226 Difference]: Without dead ends: 1944 [2024-09-20 18:42:02,759 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11769 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3323, Invalid=28897, Unknown=0, NotChecked=0, Total=32220 [2024-09-20 18:42:02,760 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 525 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:42:02,760 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 5 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-20 18:42:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2024-09-20 18:42:04,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1563. [2024-09-20 18:42:04,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1551 states have (on average 1.38749194068343) internal successors, (2152), 1552 states have internal predecessors, (2152), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:42:04,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2163 transitions. [2024-09-20 18:42:04,031 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2163 transitions. Word has length 81 [2024-09-20 18:42:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:42:04,032 INFO L474 AbstractCegarLoop]: Abstraction has 1563 states and 2163 transitions. [2024-09-20 18:42:04,032 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.340909090909091) internal successors, (103), 41 states have internal predecessors, (103), 4 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-20 18:42:04,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:04,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2163 transitions. [2024-09-20 18:42:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-20 18:42:04,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:42:04,036 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 8, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:42:04,051 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 18:42:04,237 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:42:04,237 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:42:04,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash 184241557, now seen corresponding path program 9 times [2024-09-20 18:42:04,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:42:04,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593912555] [2024-09-20 18:42:04,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:42:04,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:42:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:04,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:42:04,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:04,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:42:04,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:06,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:42:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:06,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:42:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 10 proven. 212 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:42:06,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:42:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593912555] [2024-09-20 18:42:06,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593912555] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:42:06,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041892981] [2024-09-20 18:42:06,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:42:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:42:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:42:06,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:42:06,450 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:42:06,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:42:06,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:42:06,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:42:06,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:42:06,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:42:06,678 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-09-20 18:42:06,679 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 1 case distinctions, treesize of input 21 treesize of output 20 [2024-09-20 18:42:06,764 INFO L349 Elim1Store]: treesize reduction 42, result has 28.8 percent of original size [2024-09-20 18:42:06,764 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 3 case distinctions, treesize of input 30 treesize of output 32 [2024-09-20 18:42:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2024-09-20 18:42:07,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:42:08,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-20 18:42:08,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-20 18:42:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2024-09-20 18:42:08,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041892981] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:42:08,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:42:08,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 15, 14] total 58 [2024-09-20 18:42:08,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018815306] [2024-09-20 18:42:08,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:42:08,102 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-20 18:42:08,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:42:08,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-20 18:42:08,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3048, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 18:42:08,103 INFO L87 Difference]: Start difference. First operand 1563 states and 2163 transitions. Second operand has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-20 18:42:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:42:23,795 INFO L93 Difference]: Finished difference Result 2963 states and 4108 transitions. [2024-09-20 18:42:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-20 18:42:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 81 [2024-09-20 18:42:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:42:23,808 INFO L225 Difference]: With dead ends: 2963 [2024-09-20 18:42:23,809 INFO L226 Difference]: Without dead ends: 2618 [2024-09-20 18:42:23,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 139 SyntacticMatches, 9 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11932 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4270, Invalid=32402, Unknown=0, NotChecked=0, Total=36672 [2024-09-20 18:42:23,814 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 313 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3131 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 3261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:42:23,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 30 Invalid, 3261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3131 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-20 18:42:23,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2024-09-20 18:42:25,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2234. [2024-09-20 18:42:25,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2220 states have (on average 1.381981981981982) internal successors, (3068), 2221 states have internal predecessors, (3068), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-20 18:42:25,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 3081 transitions. [2024-09-20 18:42:25,987 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 3081 transitions. Word has length 81 [2024-09-20 18:42:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:42:25,987 INFO L474 AbstractCegarLoop]: Abstraction has 2234 states and 3081 transitions. [2024-09-20 18:42:25,988 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 11 states have call successors, (15), 7 states have call predecessors, (15), 4 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2024-09-20 18:42:25,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 3081 transitions. [2024-09-20 18:42:25,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-20 18:42:25,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:42:25,994 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:42:26,012 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 18:42:26,194 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:42:26,195 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:42:26,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:26,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1521296884, now seen corresponding path program 10 times [2024-09-20 18:42:26,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:42:26,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887267886] [2024-09-20 18:42:26,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:42:26,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:42:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:42:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:42:26,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:42:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:42:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:42:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 7 proven. 29 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-20 18:42:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:42:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887267886] [2024-09-20 18:42:26,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887267886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:42:26,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225046403] [2024-09-20 18:42:26,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:42:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:42:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:42:26,877 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:42:26,878 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:42:27,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:42:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:42:27,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 18:42:27,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:42:27,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2024-09-20 18:42:27,031 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 33 treesize of output 32 [2024-09-20 18:42:27,058 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:27,058 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 1 case distinctions, treesize of input 47 treesize of output 49 [2024-09-20 18:42:27,097 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:27,097 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 3 case distinctions, treesize of input 58 treesize of output 63 [2024-09-20 18:42:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 17 proven. 90 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2024-09-20 18:42:28,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:42:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2024-09-20 18:42:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225046403] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:42:28,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:42:28,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 14] total 45 [2024-09-20 18:42:28,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543638999] [2024-09-20 18:42:28,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:42:28,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-20 18:42:28,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:42:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-20 18:42:28,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1731, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 18:42:28,689 INFO L87 Difference]: Start difference. First operand 2234 states and 3081 transitions. Second operand has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:42:32,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:42:32,541 INFO L93 Difference]: Finished difference Result 2247 states and 3095 transitions. [2024-09-20 18:42:32,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 18:42:32,541 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 88 [2024-09-20 18:42:32,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:42:32,553 INFO L225 Difference]: With dead ends: 2247 [2024-09-20 18:42:32,553 INFO L226 Difference]: Without dead ends: 2245 [2024-09-20 18:42:32,555 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 153 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1638 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=825, Invalid=5027, Unknown=0, NotChecked=0, Total=5852 [2024-09-20 18:42:32,557 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 162 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:42:32,557 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 42 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:42:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2024-09-20 18:42:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2241. [2024-09-20 18:42:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2241 states, 2225 states have (on average 1.381123595505618) internal successors, (3073), 2226 states have internal predecessors, (3073), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:42:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3088 transitions. [2024-09-20 18:42:34,742 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3088 transitions. Word has length 88 [2024-09-20 18:42:34,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:42:34,742 INFO L474 AbstractCegarLoop]: Abstraction has 2241 states and 3088 transitions. [2024-09-20 18:42:34,742 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 40 states have internal predecessors, (87), 16 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:42:34,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3088 transitions. [2024-09-20 18:42:34,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-09-20 18:42:34,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:42:34,748 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:42:34,765 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 18:42:34,948 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:42:34,948 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:42:34,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:42:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash -238741709, now seen corresponding path program 11 times [2024-09-20 18:42:34,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:42:34,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811508235] [2024-09-20 18:42:34,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:42:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:42:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:35,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:42:35,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:35,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:42:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:36,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:42:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:36,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:42:36,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:36,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:42:36,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:36,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 18:42:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:42:36,995 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 14 proven. 211 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2024-09-20 18:42:36,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:42:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811508235] [2024-09-20 18:42:36,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811508235] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:42:36,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453560569] [2024-09-20 18:42:36,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:42:36,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:42:36,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:42:36,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:42:36,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:42:37,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 18:42:37,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:42:37,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 18:42:37,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:42:37,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 18:42:37,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-09-20 18:42:37,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:37,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2024-09-20 18:42:37,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:37,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2024-09-20 18:42:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 18:42:37,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:42:37,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 56 [2024-09-20 18:42:40,601 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 6 proven. 43 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2024-09-20 18:42:40,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:42:41,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-09-20 18:42:41,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-09-20 18:42:41,326 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 12 proven. 31 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2024-09-20 18:42:41,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453560569] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:42:41,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:42:41,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 17, 13] total 54 [2024-09-20 18:42:41,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809944324] [2024-09-20 18:42:41,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:42:41,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 18:42:41,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:42:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 18:42:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2669, Unknown=0, NotChecked=0, Total=2862 [2024-09-20 18:42:41,328 INFO L87 Difference]: Start difference. First operand 2241 states and 3088 transitions. Second operand has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:43:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:43:07,869 INFO L93 Difference]: Finished difference Result 3433 states and 4683 transitions. [2024-09-20 18:43:07,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2024-09-20 18:43:07,870 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 95 [2024-09-20 18:43:07,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:43:07,882 INFO L225 Difference]: With dead ends: 3433 [2024-09-20 18:43:07,883 INFO L226 Difference]: Without dead ends: 3040 [2024-09-20 18:43:07,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 166 SyntacticMatches, 14 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12789 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=4200, Invalid=34412, Unknown=0, NotChecked=0, Total=38612 [2024-09-20 18:43:07,887 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 244 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4831 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 4947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 4831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:43:07,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 36 Invalid, 4947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 4831 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 18:43:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3040 states. [2024-09-20 18:43:10,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3040 to 2557. [2024-09-20 18:43:10,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2539 states have (on average 1.3796770382040173) internal successors, (3503), 2540 states have internal predecessors, (3503), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 18:43:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 3520 transitions. [2024-09-20 18:43:10,795 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 3520 transitions. Word has length 95 [2024-09-20 18:43:10,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:43:10,795 INFO L474 AbstractCegarLoop]: Abstraction has 2557 states and 3520 transitions. [2024-09-20 18:43:10,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 52 states have (on average 2.269230769230769) internal successors, (118), 51 states have internal predecessors, (118), 15 states have call successors, (19), 7 states have call predecessors, (19), 4 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-09-20 18:43:10,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:43:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 3520 transitions. [2024-09-20 18:43:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-20 18:43:10,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:43:10,802 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:43:10,822 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 18:43:11,004 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 18:43:11,004 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:43:11,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:43:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1785967466, now seen corresponding path program 1 times [2024-09-20 18:43:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:43:11,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607718426] [2024-09-20 18:43:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:43:11,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:43:11,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:43:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-20 18:43:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-20 18:43:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-20 18:43:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-20 18:43:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-20 18:43:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-20 18:43:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,133 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 37 proven. 13 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-20 18:43:11,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:43:11,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607718426] [2024-09-20 18:43:11,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607718426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:43:11,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394894536] [2024-09-20 18:43:11,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:43:11,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:43:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:43:11,135 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:43:11,136 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:43:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:43:11,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 18:43:11,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:43:11,306 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2024-09-20 18:43:11,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 18:43:11,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394894536] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:43:11,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 18:43:11,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 11 [2024-09-20 18:43:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475396092] [2024-09-20 18:43:11,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:43:11,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:43:11,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:43:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:43:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:43:11,309 INFO L87 Difference]: Start difference. First operand 2557 states and 3520 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 18:43:14,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:43:14,131 INFO L93 Difference]: Finished difference Result 2559 states and 3522 transitions. [2024-09-20 18:43:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:43:14,131 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 102 [2024-09-20 18:43:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:43:14,135 INFO L225 Difference]: With dead ends: 2559 [2024-09-20 18:43:14,135 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 18:43:14,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:43:14,140 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:43:14,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:43:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 18:43:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 18:43:14,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 18:43:14,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 18:43:14,145 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2024-09-20 18:43:14,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:43:14,146 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 18:43:14,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 18:43:14,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:43:14,147 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 18:43:14,147 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 18:43:14,149 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 18:43:14,167 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 18:43:14,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 18:43:14,357 INFO L408 BasicCegarLoop]: Path program histogram: [11, 3, 2, 2, 1, 1, 1, 1] [2024-09-20 18:43:14,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 18:44:00,721 WARN L293 SmtUtils]: Spent 46.09s on a formula simplification. DAG size of input: 831 DAG size of output: 977 (called from [L 212] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.or)