./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/eureka_01-2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/eureka_01-2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 11:56:36,070 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 11:56:36,133 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 11:56:36,140 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 11:56:36,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 11:56:36,164 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 11:56:36,165 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 11:56:36,166 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 11:56:36,166 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 11:56:36,167 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 11:56:36,168 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 11:56:36,168 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 11:56:36,169 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 11:56:36,169 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 11:56:36,170 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 11:56:36,170 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 11:56:36,171 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 11:56:36,171 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 11:56:36,171 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 11:56:36,171 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 11:56:36,171 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 11:56:36,175 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 11:56:36,175 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 11:56:36,175 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 11:56:36,176 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 11:56:36,176 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 11:56:36,176 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 11:56:36,176 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 11:56:36,177 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 11:56:36,177 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 11:56:36,177 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 11:56:36,177 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 11:56:36,178 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:36,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 11:56:36,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 11:56:36,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 11:56:36,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 11:56:36,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 11:56:36,180 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 11:56:36,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 11:56:36,181 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 11:56:36,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 11:56:36,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc84672deb8568f357f3e53d1889a4a141611ae62422dd83eb7a6bc6f311a8b1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 11:56:36,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 11:56:36,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 11:56:36,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 11:56:36,446 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 11:56:36,447 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 11:56:36,447 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/eureka_01-2.c [2024-09-20 11:56:37,827 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 11:56:37,980 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 11:56:37,984 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/eureka_01-2.c [2024-09-20 11:56:37,990 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f0e4164eb/7c9279aff5ea4266a246ae3f6de49813/FLAGebe34c080 [2024-09-20 11:56:38,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f0e4164eb/7c9279aff5ea4266a246ae3f6de49813 [2024-09-20 11:56:38,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 11:56:38,002 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 11:56:38,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:38,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 11:56:38,008 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 11:56:38,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d8b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38, skipping insertion in model container [2024-09-20 11:56:38,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,025 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 11:56:38,146 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_01-2.c[323,336] [2024-09-20 11:56:38,185 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:38,194 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 11:56:38,207 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_01-2.c[323,336] [2024-09-20 11:56:38,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 11:56:38,236 INFO L204 MainTranslator]: Completed translation [2024-09-20 11:56:38,237 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38 WrapperNode [2024-09-20 11:56:38,237 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 11:56:38,238 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:38,238 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 11:56:38,238 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 11:56:38,263 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,280 INFO L138 Inliner]: procedures = 13, calls = 100, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 11:56:38,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 11:56:38,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 11:56:38,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 11:56:38,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 11:56:38,290 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,290 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,294 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,320 INFO L175 MemorySlicer]: Split 78 memory accesses to 5 slices as follows [2, 22, 22, 23, 9]. 29 percent of accesses are in the largest equivalence class. The 62 initializations are split as follows [2, 20, 20, 20, 0]. The 3 writes are split as follows [0, 0, 0, 0, 3]. [2024-09-20 11:56:38,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,337 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,341 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,343 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,344 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,346 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 11:56:38,347 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 11:56:38,347 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 11:56:38,347 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 11:56:38,349 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (1/1) ... [2024-09-20 11:56:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 11:56:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:38,379 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 11:56:38,384 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 11:56:38,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 11:56:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 11:56:38,419 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 11:56:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 11:56:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 11:56:38,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-09-20 11:56:38,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-09-20 11:56:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 11:56:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 11:56:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 11:56:38,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 11:56:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 11:56:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 11:56:38,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-09-20 11:56:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-09-20 11:56:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-09-20 11:56:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 11:56:38,422 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 11:56:38,422 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-20 11:56:38,495 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 11:56:38,497 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 11:56:38,748 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-09-20 11:56:38,749 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 11:56:38,773 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 11:56:38,774 INFO L318 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-20 11:56:38,774 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:38 BoogieIcfgContainer [2024-09-20 11:56:38,774 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 11:56:38,777 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 11:56:38,778 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 11:56:38,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 11:56:38,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 11:56:38" (1/3) ... [2024-09-20 11:56:38,781 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3cf0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:38, skipping insertion in model container [2024-09-20 11:56:38,781 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 11:56:38" (2/3) ... [2024-09-20 11:56:38,782 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a3cf0df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 11:56:38, skipping insertion in model container [2024-09-20 11:56:38,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 11:56:38" (3/3) ... [2024-09-20 11:56:38,783 INFO L112 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2024-09-20 11:56:38,798 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 11:56:38,798 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 11:56:38,858 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 11:56:38,866 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;@6cfb5bc4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 11:56:38,866 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 11:56:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 11:56:38,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 11:56:38,876 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:38,876 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:38,877 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:38,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 765619845, now seen corresponding path program 1 times [2024-09-20 11:56:38,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:38,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399931856] [2024-09-20 11:56:38,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:38,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:39,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,090 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 11:56:39,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:39,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399931856] [2024-09-20 11:56:39,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399931856] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:39,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:39,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 11:56:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012697285] [2024-09-20 11:56:39,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:39,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 11:56:39,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 11:56:39,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:56:39,116 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.625) internal successors, (39), 25 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:39,211 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions. [2024-09-20 11:56:39,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 11:56:39,213 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 11:56:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:39,218 INFO L225 Difference]: With dead ends: 56 [2024-09-20 11:56:39,218 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 11:56:39,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 11:56:39,224 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:39,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 7 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 11:56:39,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 11:56:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-20 11:56:39,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16 [2024-09-20 11:56:39,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:39,255 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-20 11:56:39,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,256 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-20 11:56:39,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 11:56:39,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:39,257 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:39,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 11:56:39,257 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:39,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1688893081, now seen corresponding path program 1 times [2024-09-20 11:56:39,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:39,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268937300] [2024-09-20 11:56:39,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:39,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,444 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 11:56:39,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268937300] [2024-09-20 11:56:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268937300] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:39,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 11:56:39,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047509528] [2024-09-20 11:56:39,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:39,446 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 11:56:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:39,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 11:56:39,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 11:56:39,447 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:39,624 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-20 11:56:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 11:56:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 11:56:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:39,625 INFO L225 Difference]: With dead ends: 49 [2024-09-20 11:56:39,625 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 11:56:39,626 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 11:56:39,628 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:39,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 7 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:39,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 11:56:39,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-09-20 11:56:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2024-09-20 11:56:39,638 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2024-09-20 11:56:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:39,639 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2024-09-20 11:56:39,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,640 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2024-09-20 11:56:39,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 11:56:39,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:39,642 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:39,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 11:56:39,642 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:39,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1747889571, now seen corresponding path program 1 times [2024-09-20 11:56:39,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:39,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754052002] [2024-09-20 11:56:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:39,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:39,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754052002] [2024-09-20 11:56:39,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754052002] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:39,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:39,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 11:56:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713466844] [2024-09-20 11:56:39,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:39,761 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 11:56:39,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 11:56:39,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 11:56:39,765 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:39,909 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2024-09-20 11:56:39,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 11:56:39,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-20 11:56:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:39,912 INFO L225 Difference]: With dead ends: 53 [2024-09-20 11:56:39,913 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 11:56:39,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:39,915 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 83 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:39,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 7 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 11:56:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2024-09-20 11:56:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2024-09-20 11:56:39,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 19 [2024-09-20 11:56:39,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:39,928 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2024-09-20 11:56:39,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:39,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,929 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2024-09-20 11:56:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 11:56:39,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:39,930 INFO L216 NwaCegarLoop]: trace histogram [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 11:56:39,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 11:56:39,931 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:39,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:39,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1285563913, now seen corresponding path program 1 times [2024-09-20 11:56:39,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:39,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489374836] [2024-09-20 11:56:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:39,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 11:56:40,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:40,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489374836] [2024-09-20 11:56:40,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489374836] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:40,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:40,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 11:56:40,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129165687] [2024-09-20 11:56:40,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:40,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 11:56:40,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:40,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 11:56:40,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 11:56:40,027 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:40,124 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2024-09-20 11:56:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 11:56:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 11:56:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:40,125 INFO L225 Difference]: With dead ends: 50 [2024-09-20 11:56:40,125 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 11:56:40,126 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:40,126 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:40,127 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:40,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 11:56:40,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-20 11:56:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2024-09-20 11:56:40,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 22 [2024-09-20 11:56:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:40,137 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2024-09-20 11:56:40,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,139 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2024-09-20 11:56:40,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 11:56:40,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:40,141 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:40,141 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 11:56:40,141 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:40,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1170342884, now seen corresponding path program 1 times [2024-09-20 11:56:40,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:40,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960184878] [2024-09-20 11:56:40,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:40,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:40,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960184878] [2024-09-20 11:56:40,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960184878] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:40,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 11:56:40,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 11:56:40,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564794905] [2024-09-20 11:56:40,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:40,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 11:56:40,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:40,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 11:56:40,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-20 11:56:40,217 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:40,345 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2024-09-20 11:56:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 11:56:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 11:56:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:40,347 INFO L225 Difference]: With dead ends: 49 [2024-09-20 11:56:40,347 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 11:56:40,347 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:40,348 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:40,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 10 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 11:56:40,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2024-09-20 11:56:40,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:40,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-20 11:56:40,361 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 25 [2024-09-20 11:56:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:40,361 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-20 11:56:40,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-20 11:56:40,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 11:56:40,362 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:40,362 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:40,363 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 11:56:40,363 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:40,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -466136846, now seen corresponding path program 1 times [2024-09-20 11:56:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061439091] [2024-09-20 11:56:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:40,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:40,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:40,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061439091] [2024-09-20 11:56:40,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061439091] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:40,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932187508] [2024-09-20 11:56:40,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:40,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:40,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:40,498 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 11:56:40,507 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 11:56:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:40,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 11:56:40,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:40,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:40,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:40,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932187508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:40,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:40,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-09-20 11:56:40,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628154446] [2024-09-20 11:56:40,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:40,727 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 11:56:40,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:40,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 11:56:40,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-20 11:56:40,728 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:40,900 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2024-09-20 11:56:40,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 11:56:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-20 11:56:40,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:40,903 INFO L225 Difference]: With dead ends: 62 [2024-09-20 11:56:40,903 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 11:56:40,904 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2024-09-20 11:56:40,904 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:40,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 19 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:40,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 11:56:40,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 11:56:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-09-20 11:56:40,918 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 27 [2024-09-20 11:56:40,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:40,918 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-09-20 11:56:40,919 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:40,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-09-20 11:56:40,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 11:56:40,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:40,921 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:40,939 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 11:56:41,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 11:56:41,122 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:41,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2081475630, now seen corresponding path program 2 times [2024-09-20 11:56:41,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:41,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199343281] [2024-09-20 11:56:41,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:56:41,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199343281] [2024-09-20 11:56:41,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199343281] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:41,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94485307] [2024-09-20 11:56:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:41,221 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 11:56:41,222 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 11:56:41,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:56:41,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:41,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 11:56:41,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 11:56:41,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 11:56:41,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94485307] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 11:56:41,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 11:56:41,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-09-20 11:56:41,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918133383] [2024-09-20 11:56:41,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 11:56:41,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 11:56:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 11:56:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:41,350 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:41,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:41,396 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2024-09-20 11:56:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 11:56:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 11:56:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:41,397 INFO L225 Difference]: With dead ends: 70 [2024-09-20 11:56:41,397 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 11:56:41,398 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-20 11:56:41,398 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:41,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 11:56:41,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 11:56:41,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2024-09-20 11:56:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2024-09-20 11:56:41,407 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2024-09-20 11:56:41,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:41,407 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2024-09-20 11:56:41,407 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:41,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,408 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2024-09-20 11:56:41,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 11:56:41,408 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:41,409 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:41,423 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:41,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 11:56:41,613 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:41,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:41,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1575312, now seen corresponding path program 1 times [2024-09-20 11:56:41,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:41,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721317584] [2024-09-20 11:56:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:41,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:41,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721317584] [2024-09-20 11:56:41,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721317584] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:41,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763216111] [2024-09-20 11:56:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:41,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:41,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:41,759 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 11:56:41,761 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 11:56:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:41,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 11:56:41,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:41,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:41,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 11:56:42,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763216111] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:42,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:42,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-09-20 11:56:42,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510407190] [2024-09-20 11:56:42,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:42,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 11:56:42,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 11:56:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2024-09-20 11:56:42,028 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:42,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:42,205 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2024-09-20 11:56:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 11:56:42,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 11:56:42,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:42,206 INFO L225 Difference]: With dead ends: 67 [2024-09-20 11:56:42,206 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 11:56:42,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=365, Unknown=0, NotChecked=0, Total=552 [2024-09-20 11:56:42,207 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:42,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 16 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 11:56:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-20 11:56:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 37 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:42,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2024-09-20 11:56:42,215 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 36 [2024-09-20 11:56:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:42,215 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2024-09-20 11:56:42,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:42,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2024-09-20 11:56:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 11:56:42,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:42,218 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:42,231 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:42,419 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 11:56:42,419 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:42,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1534550158, now seen corresponding path program 2 times [2024-09-20 11:56:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:42,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385158425] [2024-09-20 11:56:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:42,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:42,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:42,512 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 11:56:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385158425] [2024-09-20 11:56:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385158425] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562976021] [2024-09-20 11:56:42,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:56:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:42,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:42,516 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 11:56:42,518 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 11:56:42,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:56:42,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:42,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 11:56:42,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 11:56:42,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 11:56:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562976021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:42,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:42,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-09-20 11:56:42,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932179878] [2024-09-20 11:56:42,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:42,706 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 11:56:42,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:42,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 11:56:42,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2024-09-20 11:56:42,707 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:42,825 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-20 11:56:42,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 11:56:42,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-20 11:56:42,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:42,827 INFO L225 Difference]: With dead ends: 72 [2024-09-20 11:56:42,827 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 11:56:42,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2024-09-20 11:56:42,828 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 95 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:42,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 10 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:42,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 11:56:42,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-20 11:56:42,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2024-09-20 11:56:42,837 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 39 [2024-09-20 11:56:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:42,837 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2024-09-20 11:56:42,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:42,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:42,837 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2024-09-20 11:56:42,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-20 11:56:42,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:42,838 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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 11:56:42,852 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:43,042 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:43,043 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:43,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash -217673339, now seen corresponding path program 3 times [2024-09-20 11:56:43,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:43,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825497401] [2024-09-20 11:56:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:43,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:43,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 11:56:43,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:43,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825497401] [2024-09-20 11:56:43,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825497401] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:43,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896353968] [2024-09-20 11:56:43,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:56:43,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:43,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:43,179 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 11:56:43,187 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 11:56:43,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 11:56:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:43,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-20 11:56:43,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:43,348 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 11:56:43,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:43,408 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-20 11:56:43,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896353968] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:43,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:43,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 15 [2024-09-20 11:56:43,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884935579] [2024-09-20 11:56:43,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:43,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 11:56:43,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 11:56:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-09-20 11:56:43,411 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:43,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:43,971 INFO L93 Difference]: Finished difference Result 163 states and 215 transitions. [2024-09-20 11:56:43,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 11:56:43,972 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-20 11:56:43,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:43,973 INFO L225 Difference]: With dead ends: 163 [2024-09-20 11:56:43,973 INFO L226 Difference]: Without dead ends: 134 [2024-09-20 11:56:43,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=663, Invalid=1317, Unknown=0, NotChecked=0, Total=1980 [2024-09-20 11:56:43,975 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 526 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:43,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 19 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:56:43,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-20 11:56:43,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2024-09-20 11:56:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 105 states have (on average 1.276190476190476) internal successors, (134), 105 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:43,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2024-09-20 11:56:43,998 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 48 [2024-09-20 11:56:43,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:43,999 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2024-09-20 11:56:43,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 14 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:43,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:43,999 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2024-09-20 11:56:44,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-09-20 11:56:44,000 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:44,001 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:44,017 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 11:56:44,201 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 11:56:44,201 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:44,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1562879381, now seen corresponding path program 4 times [2024-09-20 11:56:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:44,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228582046] [2024-09-20 11:56:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:44,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:44,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:44,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:44,478 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 262 proven. 35 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2024-09-20 11:56:44,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228582046] [2024-09-20 11:56:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228582046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95347235] [2024-09-20 11:56:44,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 11:56:44,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:44,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:44,481 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 11:56:44,485 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 11:56:44,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 11:56:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:44,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 11:56:44,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-09-20 11:56:44,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:44,995 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 26 proven. 227 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2024-09-20 11:56:44,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95347235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:44,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:44,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2024-09-20 11:56:44,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322013665] [2024-09-20 11:56:44,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:44,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 11:56:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:44,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 11:56:44,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2024-09-20 11:56:44,998 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:45,994 INFO L93 Difference]: Finished difference Result 284 states and 378 transitions. [2024-09-20 11:56:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-20 11:56:45,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2024-09-20 11:56:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:45,995 INFO L225 Difference]: With dead ends: 284 [2024-09-20 11:56:45,995 INFO L226 Difference]: Without dead ends: 212 [2024-09-20 11:56:45,998 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 205 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1485, Invalid=4995, Unknown=0, NotChecked=0, Total=6480 [2024-09-20 11:56:45,998 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 1161 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:45,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 25 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:56:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-09-20 11:56:46,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 131. [2024-09-20 11:56:46,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 125 states have (on average 1.264) internal successors, (158), 125 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:46,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 163 transitions. [2024-09-20 11:56:46,025 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 163 transitions. Word has length 107 [2024-09-20 11:56:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:46,026 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 163 transitions. [2024-09-20 11:56:46,026 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 24 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:46,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 163 transitions. [2024-09-20 11:56:46,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-20 11:56:46,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:46,032 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:46,046 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 11:56:46,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 11:56:46,233 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:46,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:46,234 INFO L85 PathProgramCache]: Analyzing trace with hash 583062961, now seen corresponding path program 5 times [2024-09-20 11:56:46,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:46,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901317203] [2024-09-20 11:56:46,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:46,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:46,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:56:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:56:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 367 proven. 51 refuted. 0 times theorem prover too weak. 599 trivial. 0 not checked. [2024-09-20 11:56:46,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:56:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901317203] [2024-09-20 11:56:46,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901317203] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:56:46,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765669808] [2024-09-20 11:56:46,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 11:56:46,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:56:46,521 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 11:56:46,528 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 11:56:59,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2024-09-20 11:56:59,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:56:59,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 11:56:59,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:56:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 614 proven. 51 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-20 11:56:59,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:56:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1017 backedges. 493 proven. 172 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2024-09-20 11:56:59,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765669808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:56:59,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:56:59,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-09-20 11:56:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567802157] [2024-09-20 11:56:59,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:56:59,367 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 11:56:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:56:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 11:56:59,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2024-09-20 11:56:59,368 INFO L87 Difference]: Start difference. First operand 131 states and 163 transitions. Second operand has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:59,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:56:59,637 INFO L93 Difference]: Finished difference Result 316 states and 435 transitions. [2024-09-20 11:56:59,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 11:56:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2024-09-20 11:56:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:56:59,638 INFO L225 Difference]: With dead ends: 316 [2024-09-20 11:56:59,638 INFO L226 Difference]: Without dead ends: 227 [2024-09-20 11:56:59,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=574, Invalid=1066, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 11:56:59,640 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 152 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:56:59,640 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 16 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:56:59,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-20 11:56:59,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2024-09-20 11:56:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 221 states have (on average 1.2941176470588236) internal successors, (286), 221 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:56:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 291 transitions. [2024-09-20 11:56:59,708 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 291 transitions. Word has length 127 [2024-09-20 11:56:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:56:59,709 INFO L474 AbstractCegarLoop]: Abstraction has 227 states and 291 transitions. [2024-09-20 11:56:59,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.0) internal successors, (104), 25 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:56:59,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:59,709 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 291 transitions. [2024-09-20 11:56:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2024-09-20 11:56:59,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:56:59,711 INFO L216 NwaCegarLoop]: trace histogram [56, 56, 56, 6, 6, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:56:59,733 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 11:56:59,911 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:56:59,912 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:56:59,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:56:59,912 INFO L85 PathProgramCache]: Analyzing trace with hash 790417841, now seen corresponding path program 6 times [2024-09-20 11:56:59,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:56:59,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628545424] [2024-09-20 11:56:59,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:56:59,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:56:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:00,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:00,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 1855 proven. 287 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2024-09-20 11:57:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628545424] [2024-09-20 11:57:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628545424] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:00,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378226390] [2024-09-20 11:57:00,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 11:57:00,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:00,589 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 11:57:00,590 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 11:57:02,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 11:57:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:02,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 11:57:02,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2024-09-20 11:57:02,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4937 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4901 trivial. 0 not checked. [2024-09-20 11:57:02,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378226390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:02,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:02,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 10] total 34 [2024-09-20 11:57:02,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889383498] [2024-09-20 11:57:02,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:02,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 11:57:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 11:57:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 11:57:02,917 INFO L87 Difference]: Start difference. First operand 227 states and 291 transitions. Second operand has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:10,785 INFO L93 Difference]: Finished difference Result 1002 states and 1350 transitions. [2024-09-20 11:57:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 243 states. [2024-09-20 11:57:10,788 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2024-09-20 11:57:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:10,791 INFO L225 Difference]: With dead ends: 1002 [2024-09-20 11:57:10,791 INFO L226 Difference]: Without dead ends: 841 [2024-09-20 11:57:10,803 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 433 SyntacticMatches, 0 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29015 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=21038, Invalid=53764, Unknown=0, NotChecked=0, Total=74802 [2024-09-20 11:57:10,804 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 3828 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3829 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:10,804 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3829 Valid, 34 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 11:57:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2024-09-20 11:57:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 255. [2024-09-20 11:57:10,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 249 states have (on average 1.2771084337349397) internal successors, (318), 249 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:57:10,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 323 transitions. [2024-09-20 11:57:10,880 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 323 transitions. Word has length 223 [2024-09-20 11:57:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:10,880 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 323 transitions. [2024-09-20 11:57:10,880 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.4705882352941178) internal successors, (118), 33 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:10,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 323 transitions. [2024-09-20 11:57:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2024-09-20 11:57:10,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:10,882 INFO L216 NwaCegarLoop]: trace histogram [60, 60, 60, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:10,899 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 11:57:11,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:11,084 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:11,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1735881021, now seen corresponding path program 7 times [2024-09-20 11:57:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889277655] [2024-09-20 11:57:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-20 11:57:11,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:11,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889277655] [2024-09-20 11:57:11,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889277655] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:11,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530053512] [2024-09-20 11:57:11,946 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 11:57:11,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:11,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:11,948 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 11:57:11,949 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 11:57:12,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:12,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 1574 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 11:57:12,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-20 11:57:12,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 5803 backedges. 2122 proven. 330 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2024-09-20 11:57:12,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530053512] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:12,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:12,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2024-09-20 11:57:12,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622608985] [2024-09-20 11:57:12,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:12,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 11:57:12,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 11:57:12,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 11:57:12,723 INFO L87 Difference]: Start difference. First operand 255 states and 323 transitions. Second operand has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:13,196 INFO L93 Difference]: Finished difference Result 501 states and 659 transitions. [2024-09-20 11:57:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 11:57:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2024-09-20 11:57:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:13,198 INFO L225 Difference]: With dead ends: 501 [2024-09-20 11:57:13,199 INFO L226 Difference]: Without dead ends: 315 [2024-09-20 11:57:13,199 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 471 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1300, Invalid=2482, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 11:57:13,200 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 221 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:13,200 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 22 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 11:57:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-09-20 11:57:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2024-09-20 11:57:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 309 states have (on average 1.2880258899676376) internal successors, (398), 309 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:57:13,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 403 transitions. [2024-09-20 11:57:13,264 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 403 transitions. Word has length 251 [2024-09-20 11:57:13,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:13,264 INFO L474 AbstractCegarLoop]: Abstraction has 315 states and 403 transitions. [2024-09-20 11:57:13,264 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4146341463414633) internal successors, (140), 40 states have internal predecessors, (140), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:13,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:13,264 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 403 transitions. [2024-09-20 11:57:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2024-09-20 11:57:13,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:13,267 INFO L216 NwaCegarLoop]: trace histogram [80, 80, 80, 14, 14, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:13,282 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-20 11:57:13,470 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 11:57:13,471 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:13,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:13,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1724060895, now seen corresponding path program 8 times [2024-09-20 11:57:13,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:13,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520009828] [2024-09-20 11:57:13,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:13,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:14,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-20 11:57:14,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520009828] [2024-09-20 11:57:14,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520009828] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:14,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210559096] [2024-09-20 11:57:14,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:57:14,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:14,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:14,102 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 11:57:14,104 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 11:57:14,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 11:57:14,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:14,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 11:57:14,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:15,109 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-20 11:57:15,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10053 backedges. 0 proven. 7462 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2024-09-20 11:57:15,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210559096] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:57:15,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:57:15,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2024-09-20 11:57:15,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017710227] [2024-09-20 11:57:15,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:57:15,370 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 11:57:15,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:57:15,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 11:57:15,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2024-09-20 11:57:15,371 INFO L87 Difference]: Start difference. First operand 315 states and 403 transitions. Second operand has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:15,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:57:15,660 INFO L93 Difference]: Finished difference Result 431 states and 546 transitions. [2024-09-20 11:57:15,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 11:57:15,660 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2024-09-20 11:57:15,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:57:15,663 INFO L225 Difference]: With dead ends: 431 [2024-09-20 11:57:15,663 INFO L226 Difference]: Without dead ends: 391 [2024-09-20 11:57:15,664 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 613 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2024-09-20 11:57:15,664 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 288 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 11:57:15,664 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 16 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 11:57:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2024-09-20 11:57:15,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 378. [2024-09-20 11:57:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.2956989247311828) internal successors, (482), 372 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:57:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 487 transitions. [2024-09-20 11:57:15,749 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 487 transitions. Word has length 311 [2024-09-20 11:57:15,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:57:15,750 INFO L474 AbstractCegarLoop]: Abstraction has 378 states and 487 transitions. [2024-09-20 11:57:15,750 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.05) internal successors, (101), 19 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:57:15,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:15,750 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 487 transitions. [2024-09-20 11:57:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2024-09-20 11:57:15,753 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:57:15,753 INFO L216 NwaCegarLoop]: trace histogram [100, 100, 100, 14, 14, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:57:15,769 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 11:57:15,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 11:57:15,955 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:57:15,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:57:15,955 INFO L85 PathProgramCache]: Analyzing trace with hash 416411771, now seen corresponding path program 9 times [2024-09-20 11:57:15,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:57:15,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270010932] [2024-09-20 11:57:15,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:57:15,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:57:16,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:17,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:57:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:57:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2024-09-20 11:57:17,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:57:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270010932] [2024-09-20 11:57:17,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270010932] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:57:17,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909225498] [2024-09-20 11:57:17,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 11:57:17,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:57:17,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:57:17,044 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 11:57:17,045 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 11:57:17,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 11:57:17,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 11:57:17,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 11:57:17,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:57:17,624 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 19 treesize of output 1 [2024-09-20 11:57:17,767 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 37 treesize of output 21 [2024-09-20 11:57:18,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 11:57:18,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-20 11:57:18,106 INFO L349 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2024-09-20 11:57:18,107 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 4 case distinctions, treesize of input 37 treesize of output 46 [2024-09-20 11:57:18,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:18,189 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 26 treesize of output 10 [2024-09-20 11:57:18,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-09-20 11:57:18,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 524 proven. 4 refuted. 0 times theorem prover too weak. 15088 trivial. 0 not checked. [2024-09-20 11:57:18,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:57:33,840 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 146 treesize of output 138 [2024-09-20 11:57:33,894 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 11:57:33,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48498 treesize of output 43170 [2024-09-20 11:58:23,255 INFO L134 CoverageAnalysis]: Checked inductivity of 15616 backedges. 506 proven. 22 refuted. 0 times theorem prover too weak. 15088 trivial. 0 not checked. [2024-09-20 11:58:23,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909225498] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:58:23,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:58:23,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 43 [2024-09-20 11:58:23,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295443149] [2024-09-20 11:58:23,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:58:23,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-20 11:58:23,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:58:23,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-20 11:58:23,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1551, Unknown=4, NotChecked=0, Total=1806 [2024-09-20 11:58:23,257 INFO L87 Difference]: Start difference. First operand 378 states and 487 transitions. Second operand has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 11:58:29,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.59s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:31,690 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:34,437 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:40,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:45,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:48,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:51,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:58:59,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-20 11:59:05,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2024-09-20 11:59:13,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:13,074 INFO L93 Difference]: Finished difference Result 1098 states and 1423 transitions. [2024-09-20 11:59:13,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-20 11:59:13,075 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 374 [2024-09-20 11:59:13,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:13,078 INFO L225 Difference]: With dead ends: 1098 [2024-09-20 11:59:13,078 INFO L226 Difference]: Without dead ends: 748 [2024-09-20 11:59:13,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 842 GetRequests, 726 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4951 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=3345, Invalid=10455, Unknown=6, NotChecked=0, Total=13806 [2024-09-20 11:59:13,080 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 761 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 182 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:13,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [761 Valid, 65 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 1017 Invalid, 8 Unknown, 0 Unchecked, 29.2s Time] [2024-09-20 11:59:13,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2024-09-20 11:59:13,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 687. [2024-09-20 11:59:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 681 states have (on average 1.3054331864904551) internal successors, (889), 681 states have internal predecessors, (889), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:59:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 894 transitions. [2024-09-20 11:59:13,304 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 894 transitions. Word has length 374 [2024-09-20 11:59:13,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:13,304 INFO L474 AbstractCegarLoop]: Abstraction has 687 states and 894 transitions. [2024-09-20 11:59:13,304 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 42 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-20 11:59:13,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 894 transitions. [2024-09-20 11:59:13,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2024-09-20 11:59:13,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:13,306 INFO L216 NwaCegarLoop]: trace histogram [100, 100, 99, 15, 15, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:13,323 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 11:59:13,506 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 11:59:13,507 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:13,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:13,507 INFO L85 PathProgramCache]: Analyzing trace with hash 103869643, now seen corresponding path program 1 times [2024-09-20 11:59:13,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:13,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785777343] [2024-09-20 11:59:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:16,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 15645 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2024-09-20 11:59:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785777343] [2024-09-20 11:59:16,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785777343] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:16,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016061834] [2024-09-20 11:59:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:16,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:16,337 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 11:59:16,344 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 11:59:16,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:16,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 2310 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 11:59:16,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 11:59:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15645 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2024-09-20 11:59:24,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 11:59:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 15645 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 15420 trivial. 0 not checked. [2024-09-20 11:59:31,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016061834] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 11:59:31,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 11:59:31,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 41 [2024-09-20 11:59:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440098054] [2024-09-20 11:59:31,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 11:59:31,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-20 11:59:31,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 11:59:31,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-20 11:59:31,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1001, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 11:59:31,109 INFO L87 Difference]: Start difference. First operand 687 states and 894 transitions. Second operand has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 40 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 11:59:38,485 INFO L93 Difference]: Finished difference Result 2768 states and 3681 transitions. [2024-09-20 11:59:38,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-20 11:59:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 40 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 376 [2024-09-20 11:59:38,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 11:59:38,494 INFO L225 Difference]: With dead ends: 2768 [2024-09-20 11:59:38,494 INFO L226 Difference]: Without dead ends: 2758 [2024-09-20 11:59:38,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 721 SyntacticMatches, 12 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1525 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1300, Invalid=2482, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 11:59:38,495 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 907 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2024-09-20 11:59:38,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 19 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2024-09-20 11:59:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2024-09-20 11:59:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 697. [2024-09-20 11:59:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 691 states have (on average 1.301013024602026) internal successors, (899), 691 states have internal predecessors, (899), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 11:59:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 904 transitions. [2024-09-20 11:59:38,808 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 904 transitions. Word has length 376 [2024-09-20 11:59:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 11:59:38,809 INFO L474 AbstractCegarLoop]: Abstraction has 697 states and 904 transitions. [2024-09-20 11:59:38,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.707317073170732) internal successors, (111), 40 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 11:59:38,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:38,810 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 904 transitions. [2024-09-20 11:59:38,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2024-09-20 11:59:38,812 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 11:59:38,812 INFO L216 NwaCegarLoop]: trace histogram [100, 100, 99, 20, 20, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 11:59:38,828 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 11:59:39,012 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 11:59:39,013 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 11:59:39,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 11:59:39,013 INFO L85 PathProgramCache]: Analyzing trace with hash -514259375, now seen corresponding path program 2 times [2024-09-20 11:59:39,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 11:59:39,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230584762] [2024-09-20 11:59:39,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 11:59:39,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 11:59:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:59,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 11:59:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 11:59:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 7686 proven. 455 refuted. 0 times theorem prover too weak. 7679 trivial. 0 not checked. [2024-09-20 11:59:59,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 11:59:59,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230584762] [2024-09-20 11:59:59,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230584762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 11:59:59,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325737658] [2024-09-20 11:59:59,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 11:59:59,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 11:59:59,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 11:59:59,795 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 11:59:59,795 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 12:00:00,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:00:00,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:00:00,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 2380 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-20 12:00:00,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:00:16,118 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 21 [2024-09-20 12:00:18,470 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 12:00:18,470 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 32 treesize of output 16 [2024-09-20 12:00:18,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 12:00:18,496 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 31 treesize of output 15 [2024-09-20 12:00:19,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 2424 proven. 100 refuted. 0 times theorem prover too weak. 13296 trivial. 0 not checked. [2024-09-20 12:00:19,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:00:20,786 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 99 treesize of output 91 [2024-09-20 12:00:21,037 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 12:00:21,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 222 [2024-09-20 12:00:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 15820 backedges. 2424 proven. 100 refuted. 0 times theorem prover too weak. 13296 trivial. 0 not checked. [2024-09-20 12:00:40,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325737658] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:00:40,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:00:40,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 44 [2024-09-20 12:00:40,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097319153] [2024-09-20 12:00:40,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:00:40,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 12:00:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:00:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 12:00:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 12:00:40,040 INFO L87 Difference]: Start difference. First operand 697 states and 904 transitions. Second operand has 44 states, 44 states have (on average 2.7954545454545454) internal successors, (123), 43 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)