./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/linear_sea.ch.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 ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/linear_sea.ch.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 eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:40:31,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:40:31,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:40:31,850 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:40:31,850 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:40:31,870 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:40:31,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:40:31,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:40:31,871 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:40:31,872 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:40:31,872 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:40:31,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:40:31,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:40:31,874 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:40:31,875 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:40:31,876 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:40:31,876 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:40:31,876 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:40:31,876 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:40:31,877 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:40:31,877 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:40:31,879 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:40:31,879 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:40:31,879 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:40:31,880 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:40:31,880 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:40:31,880 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:40:31,881 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:40:31,881 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:40:31,881 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:40:31,882 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:40:31,882 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:40:31,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:31,883 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:40:31,883 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:40:31,884 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:40:31,884 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:40:31,884 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:40:31,885 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:40:31,885 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:40:31,885 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:40:31,886 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:40:31,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:40:32,136 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:40:32,161 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:40:32,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:40:32,165 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:40:32,165 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:40:32,167 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops/linear_sea.ch.c [2024-09-20 18:40:33,613 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:40:33,786 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:40:33,786 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops/linear_sea.ch.c [2024-09-20 18:40:33,794 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a1ef1388f/3d874b320aeb4dd1905485d92aaee90e/FLAG928106b35 [2024-09-20 18:40:33,810 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a1ef1388f/3d874b320aeb4dd1905485d92aaee90e [2024-09-20 18:40:33,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:40:33,814 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:40:33,815 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:33,815 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:40:33,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:40:33,819 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,820 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a6f2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:33, skipping insertion in model container [2024-09-20 18:40:33,820 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:40:33" (1/1) ... [2024-09-20 18:40:33,837 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:40:33,999 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/linear_sea.ch.c[383,396] [2024-09-20 18:40:34,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:34,032 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:40:34,043 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/linear_sea.ch.c[383,396] [2024-09-20 18:40:34,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:40:34,069 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:40:34,069 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34 WrapperNode [2024-09-20 18:40:34,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:40:34,071 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:34,071 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:40:34,071 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:40:34,079 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,094 INFO L138 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:40:34,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:40:34,095 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:40:34,095 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:40:34,095 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:40:34,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,105 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,119 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-09-20 18:40:34,120 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,120 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,128 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,129 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,130 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,132 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:40:34,133 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:40:34,133 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:40:34,133 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:40:34,134 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (1/1) ... [2024-09-20 18:40:34,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:40:34,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:34,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:40:34,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:40:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:40:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2024-09-20 18:40:34,222 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2024-09-20 18:40:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:40:34,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:40:34,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:40:34,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-20 18:40:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-20 18:40:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-20 18:40:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:40:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:40:34,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-20 18:40:34,225 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:40:34,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:40:34,225 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-20 18:40:34,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-20 18:40:34,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2024-09-20 18:40:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2024-09-20 18:40:34,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:40:34,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:40:34,308 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:40:34,310 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:40:34,572 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-20 18:40:34,573 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:40:34,600 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:40:34,601 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 18:40:34,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34 BoogieIcfgContainer [2024-09-20 18:40:34,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:40:34,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:40:34,606 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:40:34,609 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:40:34,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:40:33" (1/3) ... [2024-09-20 18:40:34,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644c6524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:40:34" (2/3) ... [2024-09-20 18:40:34,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@644c6524 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:40:34, skipping insertion in model container [2024-09-20 18:40:34,613 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:40:34" (3/3) ... [2024-09-20 18:40:34,614 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2024-09-20 18:40:34,631 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:40:34,631 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:40:34,688 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:40:34,695 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;@28493050, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:40:34,695 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:40:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:40:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:40:34,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:34,709 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] [2024-09-20 18:40:34,709 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:34,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:34,713 INFO L85 PathProgramCache]: Analyzing trace with hash 430877326, now seen corresponding path program 1 times [2024-09-20 18:40:34,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:34,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525834731] [2024-09-20 18:40:34,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:34,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:34,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:34,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525834731] [2024-09-20 18:40:35,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525834731] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:35,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:35,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:40:35,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460112598] [2024-09-20 18:40:35,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:40:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:40:35,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:40:35,040 INFO L87 Difference]: Start difference. First operand has 31 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:40:35,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,159 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2024-09-20 18:40:35,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:40:35,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 21 [2024-09-20 18:40:35,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,170 INFO L225 Difference]: With dead ends: 49 [2024-09-20 18:40:35,170 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 18:40:35,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 18:40:35,179 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 21 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:35,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 18:40:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 18:40:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:35,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-09-20 18:40:35,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2024-09-20 18:40:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,218 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-09-20 18:40:35,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:40:35,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-09-20 18:40:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:40:35,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,220 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] [2024-09-20 18:40:35,221 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:40:35,221 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:35,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1655871353, now seen corresponding path program 1 times [2024-09-20 18:40:35,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:35,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579795810] [2024-09-20 18:40:35,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:35,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:35,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579795810] [2024-09-20 18:40:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579795810] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:35,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:35,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 18:40:35,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123626942] [2024-09-20 18:40:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:35,559 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:40:35,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:40:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:40:35,563 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:40:35,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:35,762 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2024-09-20 18:40:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:40:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2024-09-20 18:40:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:35,764 INFO L225 Difference]: With dead ends: 32 [2024-09-20 18:40:35,764 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 18:40:35,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:40:35,766 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:35,767 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 35 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:40:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 18:40:35,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 18:40:35,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 18:40:35,781 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2024-09-20 18:40:35,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:35,781 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 18:40:35,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-20 18:40:35,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 18:40:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:40:35,786 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:35,786 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] [2024-09-20 18:40:35,786 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:40:35,786 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:35,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash 86938982, now seen corresponding path program 1 times [2024-09-20 18:40:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:35,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921372328] [2024-09-20 18:40:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:36,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:36,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:36,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921372328] [2024-09-20 18:40:36,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921372328] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:40:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:40:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-20 18:40:36,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914838417] [2024-09-20 18:40:36,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:40:36,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 18:40:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 18:40:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:40:36,881 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:37,208 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2024-09-20 18:40:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:40:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2024-09-20 18:40:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:37,210 INFO L225 Difference]: With dead ends: 36 [2024-09-20 18:40:37,210 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 18:40:37,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:40:37,212 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:37,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 25 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:40:37,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 18:40:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 18:40:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:37,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-09-20 18:40:37,222 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 23 [2024-09-20 18:40:37,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:37,223 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-09-20 18:40:37,223 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:37,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,223 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-09-20 18:40:37,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:40:37,224 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:37,224 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:37,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:40:37,225 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:37,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:37,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2127576749, now seen corresponding path program 1 times [2024-09-20 18:40:37,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:37,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106181073] [2024-09-20 18:40:37,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:37,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:37,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106181073] [2024-09-20 18:40:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106181073] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634761862] [2024-09-20 18:40:37,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:37,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:37,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:37,521 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:37,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:40:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:37,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:40:37,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:37,676 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 7 treesize of output 6 [2024-09-20 18:40:37,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2024-09-20 18:40:38,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:38,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:39,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634761862] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:39,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:39,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 8] total 26 [2024-09-20 18:40:39,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242180751] [2024-09-20 18:40:39,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:39,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-20 18:40:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-20 18:40:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:40:39,194 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 18:40:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:41,630 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2024-09-20 18:40:41,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:40:41,631 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 26 [2024-09-20 18:40:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:41,632 INFO L225 Difference]: With dead ends: 59 [2024-09-20 18:40:41,633 INFO L226 Difference]: Without dead ends: 40 [2024-09-20 18:40:41,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=538, Invalid=1912, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 18:40:41,636 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 198 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:41,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 38 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:40:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-20 18:40:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2024-09-20 18:40:41,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:41,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-09-20 18:40:41,657 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 26 [2024-09-20 18:40:41,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:41,658 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-09-20 18:40:41,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 4 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 18:40:41,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-09-20 18:40:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:40:41,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:41,659 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:41,678 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:40:41,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:41,864 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:40:41,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -166112124, now seen corresponding path program 1 times [2024-09-20 18:40:41,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:40:41,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569620221] [2024-09-20 18:40:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:41,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:40:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:40:42,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:40:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:42,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:40:42,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:43,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:40:43,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569620221] [2024-09-20 18:40:43,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569620221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:40:43,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114452885] [2024-09-20 18:40:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:40:43,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:40:43,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:40:43,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:40:43,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:40:43,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:40:43,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-20 18:40:43,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:40:43,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 58 [2024-09-20 18:40:43,184 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-20 18:40:43,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-20 18:40:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:44,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:40:46,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-20 18:40:46,914 INFO L349 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2024-09-20 18:40:46,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2024-09-20 18:40:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:40:46,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114452885] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:40:46,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:40:46,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 13] total 39 [2024-09-20 18:40:46,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667923741] [2024-09-20 18:40:46,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:40:46,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 18:40:46,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:40:46,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 18:40:46,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:40:46,925 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 18:40:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:40:59,866 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2024-09-20 18:40:59,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-20 18:40:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) Word has length 29 [2024-09-20 18:40:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:40:59,868 INFO L225 Difference]: With dead ends: 78 [2024-09-20 18:40:59,868 INFO L226 Difference]: Without dead ends: 62 [2024-09-20 18:40:59,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=1115, Invalid=5200, Unknown=5, NotChecked=0, Total=6320 [2024-09-20 18:40:59,871 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:40:59,871 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 75 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 18:40:59,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-20 18:40:59,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2024-09-20 18:40:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:40:59,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-20 18:40:59,898 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 29 [2024-09-20 18:40:59,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:40:59,898 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-20 18:40:59,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 states have internal predecessors, (52), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (7), 4 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-20 18:40:59,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:40:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-20 18:40:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:40:59,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:40:59,900 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:40:59,917 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 18:41:00,104 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:00,105 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:00,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1383275185, now seen corresponding path program 2 times [2024-09-20 18:41:00,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:00,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360235632] [2024-09-20 18:41:00,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:00,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:00,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:41:00,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:00,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:41:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:01,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:01,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360235632] [2024-09-20 18:41:01,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360235632] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:01,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195511195] [2024-09-20 18:41:01,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:41:01,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:01,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:01,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:01,481 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:41:01,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:41:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:01,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 18:41:01,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:01,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 58 [2024-09-20 18:41:01,668 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-20 18:41:01,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-20 18:41:02,236 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:02,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:02,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-20 18:41:02,975 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:02,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 119 [2024-09-20 18:41:02,997 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-09-20 18:41:02,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 28 [2024-09-20 18:41:03,048 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:03,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195511195] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:03,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:03,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 35 [2024-09-20 18:41:03,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423412826] [2024-09-20 18:41:03,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:03,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:41:03,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:03,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:41:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:41:03,051 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:41:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:07,052 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-20 18:41:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-20 18:41:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 32 [2024-09-20 18:41:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:07,053 INFO L225 Difference]: With dead ends: 87 [2024-09-20 18:41:07,053 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 18:41:07,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=591, Invalid=2947, Unknown=2, NotChecked=0, Total=3540 [2024-09-20 18:41:07,055 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 157 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:07,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 55 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:41:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 18:41:07,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-09-20 18:41:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:41:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2024-09-20 18:41:07,078 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 32 [2024-09-20 18:41:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:07,078 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2024-09-20 18:41:07,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.0) internal successors, (62), 32 states have internal predecessors, (62), 9 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-20 18:41:07,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2024-09-20 18:41:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:41:07,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:07,080 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] [2024-09-20 18:41:07,093 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 18:41:07,280 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:41:07,281 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:07,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1560094502, now seen corresponding path program 2 times [2024-09-20 18:41:07,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:07,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335347023] [2024-09-20 18:41:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:07,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:07,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:07,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:07,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:41:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:07,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:41:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:41:07,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:07,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335347023] [2024-09-20 18:41:07,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335347023] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:07,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268357059] [2024-09-20 18:41:07,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:41:07,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:07,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:07,621 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:07,623 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:41:07,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 18:41:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:07,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 18:41:07,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:07,714 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 7 treesize of output 6 [2024-09-20 18:41:07,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 63 [2024-09-20 18:41:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:41:08,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:09,358 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:41:09,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268357059] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:09,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:09,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 7] total 25 [2024-09-20 18:41:09,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129429333] [2024-09-20 18:41:09,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:09,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 18:41:09,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:09,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 18:41:09,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2024-09-20 18:41:09,361 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 18:41:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:41:10,156 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2024-09-20 18:41:10,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:41:10,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) Word has length 35 [2024-09-20 18:41:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:41:10,157 INFO L225 Difference]: With dead ends: 52 [2024-09-20 18:41:10,158 INFO L226 Difference]: Without dead ends: 43 [2024-09-20 18:41:10,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:41:10,159 INFO L434 NwaCegarLoop]: 7 mSDtfsCounter, 100 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:41:10,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 46 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:41:10,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-20 18:41:10,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-09-20 18:41:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:41:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-09-20 18:41:10,183 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2024-09-20 18:41:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:41:10,183 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-09-20 18:41:10,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 6 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 18:41:10,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-09-20 18:41:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-20 18:41:10,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:41:10,184 INFO L216 NwaCegarLoop]: trace histogram [5, 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 18:41:10,197 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 18:41:10,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:10,385 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:41:10,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:41:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1167067492, now seen corresponding path program 3 times [2024-09-20 18:41:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:41:10,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173151128] [2024-09-20 18:41:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:41:10,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:41:10,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:10,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:41:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:10,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-20 18:41:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:10,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 18:41:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:41:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:14,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:41:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173151128] [2024-09-20 18:41:14,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173151128] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:41:14,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802649940] [2024-09-20 18:41:14,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:41:14,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:41:14,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:41:14,376 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:41:14,378 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:41:14,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 18:41:14,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:41:14,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-20 18:41:14,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:41:14,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 58 [2024-09-20 18:41:14,595 WARN L214 Elim1Store]: Array PQE input equivalent to false [2024-09-20 18:41:14,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 17 [2024-09-20 18:41:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:16,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:41:37,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 56 [2024-09-20 18:41:37,022 INFO L349 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2024-09-20 18:41:37,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 1 [2024-09-20 18:41:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:41:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802649940] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:41:37,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:41:37,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 17] total 54 [2024-09-20 18:41:37,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748878450] [2024-09-20 18:41:37,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:41:37,034 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-20 18:41:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:41:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-20 18:41:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2625, Unknown=2, NotChecked=0, Total=2862 [2024-09-20 18:41:37,035 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 54 states, 51 states have (on average 1.4313725490196079) internal successors, (73), 51 states have internal predecessors, (73), 9 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 18:42:47,718 WARN L293 SmtUtils]: Spent 46.74s on a formula simplification. DAG size of input: 229 DAG size of output: 191 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)