./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:57,483 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:57,603 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:37:57,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:57,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:57,656 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:57,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:57,659 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:57,660 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:57,665 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:57,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:57,667 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:57,668 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:57,670 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:57,670 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:57,671 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:57,671 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:57,672 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:57,672 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:37:57,673 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:37:57,673 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:37:57,674 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:57,675 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:37:57,675 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:37:57,676 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:57,676 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:57,677 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:57,678 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:57,678 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:57,679 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:57,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:57,680 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:57,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:57,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:57,681 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:57,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:57,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:57,682 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:57,683 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 34885b99d6eef31987b044fabc3622fa239d5dff7e774ca124915f70431dc2b3 [2023-11-19 07:37:57,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:58,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:58,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:58,033 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:58,034 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:58,035 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2023-11-19 07:38:01,168 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:38:01,527 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:38:01,528 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/sv-benchmarks/c/array-memsafety/openbsd_cstrncat-alloca-2.i [2023-11-19 07:38:01,551 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/data/ee44b7ded/fe49a604c45a4db38f68b39c26955244/FLAG9d4203d1d [2023-11-19 07:38:01,570 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/data/ee44b7ded/fe49a604c45a4db38f68b39c26955244 [2023-11-19 07:38:01,575 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:38:01,578 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:38:01,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:01,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:38:01,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:38:01,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:01" (1/1) ... [2023-11-19 07:38:01,590 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78775d57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:01, skipping insertion in model container [2023-11-19 07:38:01,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:38:01" (1/1) ... [2023-11-19 07:38:01,657 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:38:02,040 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:02,054 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:38:02,106 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:38:02,137 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:38:02,138 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02 WrapperNode [2023-11-19 07:38:02,138 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:38:02,139 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:02,139 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:38:02,139 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:38:02,147 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,218 INFO L138 Inliner]: procedures = 117, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2023-11-19 07:38:02,218 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:38:02,219 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:38:02,219 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:38:02,219 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:38:02,229 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,238 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,239 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,256 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,264 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,273 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,276 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:38:02,281 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:38:02,282 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:38:02,282 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:38:02,283 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (1/1) ... [2023-11-19 07:38:02,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:38:02,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:02,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:38:02,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:38:02,351 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:38:02,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:38:02,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:38:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:38:02,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:38:02,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:38:02,489 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:38:02,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:38:02,755 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:38:02,764 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:38:02,764 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 07:38:02,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:02 BoogieIcfgContainer [2023-11-19 07:38:02,768 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:38:02,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:38:02,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:38:02,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:38:02,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:38:01" (1/3) ... [2023-11-19 07:38:02,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1559065b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:02, skipping insertion in model container [2023-11-19 07:38:02,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:38:02" (2/3) ... [2023-11-19 07:38:02,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1559065b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:38:02, skipping insertion in model container [2023-11-19 07:38:02,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:38:02" (3/3) ... [2023-11-19 07:38:02,778 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncat-alloca-2.i [2023-11-19 07:38:02,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:38:02,800 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 17 error locations. [2023-11-19 07:38:02,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:38:02,858 INFO L357 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, mHoare=false, 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;@b66df22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:38:02,858 INFO L358 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2023-11-19 07:38:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:02,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 07:38:02,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:02,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:02,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:02,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:02,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1805031115, now seen corresponding path program 1 times [2023-11-19 07:38:02,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960377492] [2023-11-19 07:38:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:02,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:03,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:03,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960377492] [2023-11-19 07:38:03,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960377492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:03,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:03,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:38:03,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463061142] [2023-11-19 07:38:03,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:03,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:03,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:03,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:03,121 INFO L87 Difference]: Start difference. First operand has 52 states, 34 states have (on average 1.911764705882353) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:03,262 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-19 07:38:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-19 07:38:03,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:03,283 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:38:03,287 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 07:38:03,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:03,293 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 5 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:03,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 90 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 07:38:03,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-19 07:38:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-19 07:38:03,338 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2023-11-19 07:38:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:03,338 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-19 07:38:03,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,339 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-19 07:38:03,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:38:03,339 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:03,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:38:03,340 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:03,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 121388915, now seen corresponding path program 1 times [2023-11-19 07:38:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619175283] [2023-11-19 07:38:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:03,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:03,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619175283] [2023-11-19 07:38:03,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619175283] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:03,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:03,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:03,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462132126] [2023-11-19 07:38:03,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:03,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:03,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:03,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:03,529 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:03,619 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-11-19 07:38:03,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:38:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:03,621 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:38:03,621 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 07:38:03,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:03,623 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:03,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 07:38:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-19 07:38:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 49 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-11-19 07:38:03,632 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 8 [2023-11-19 07:38:03,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:03,633 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-11-19 07:38:03,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,633 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-11-19 07:38:03,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:38:03,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:03,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:38:03,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:03,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash 178647217, now seen corresponding path program 1 times [2023-11-19 07:38:03,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931622271] [2023-11-19 07:38:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:03,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:03,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931622271] [2023-11-19 07:38:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931622271] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:03,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:03,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:38:03,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192119866] [2023-11-19 07:38:03,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:03,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:03,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:03,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:03,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:03,840 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:03,910 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2023-11-19 07:38:03,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:38:03,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:03,913 INFO L225 Difference]: With dead ends: 48 [2023-11-19 07:38:03,914 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:38:03,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:03,917 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 44 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:03,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 42 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:03,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:38:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-19 07:38:03,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 47 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-11-19 07:38:03,937 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 8 [2023-11-19 07:38:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:03,939 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-11-19 07:38:03,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-11-19 07:38:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 07:38:03,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:03,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:03,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:38:03,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:03,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:03,945 INFO L85 PathProgramCache]: Analyzing trace with hash 178647218, now seen corresponding path program 1 times [2023-11-19 07:38:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:03,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427120784] [2023-11-19 07:38:03,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:03,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:04,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:04,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427120784] [2023-11-19 07:38:04,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427120784] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:04,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:38:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356675506] [2023-11-19 07:38:04,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:04,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:38:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:38:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:04,447 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:04,622 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2023-11-19 07:38:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-19 07:38:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:04,629 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:38:04,629 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:38:04,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:38:04,641 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 118 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:04,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 73 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:04,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:38:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 50. [2023-11-19 07:38:04,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 49 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-11-19 07:38:04,651 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 8 [2023-11-19 07:38:04,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:04,651 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-11-19 07:38:04,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,652 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-11-19 07:38:04,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:38:04,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:04,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:04,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:38:04,653 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:04,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -118766563, now seen corresponding path program 1 times [2023-11-19 07:38:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:04,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544730060] [2023-11-19 07:38:04,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:04,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:04,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:04,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544730060] [2023-11-19 07:38:04,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544730060] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:04,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:04,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:04,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749313023] [2023-11-19 07:38:04,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:04,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:04,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:04,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:04,708 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:04,733 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2023-11-19 07:38:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:38:04,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:04,736 INFO L225 Difference]: With dead ends: 91 [2023-11-19 07:38:04,736 INFO L226 Difference]: Without dead ends: 91 [2023-11-19 07:38:04,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:04,737 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:04,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 136 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:04,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-19 07:38:04,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2023-11-19 07:38:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.6) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2023-11-19 07:38:04,746 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 10 [2023-11-19 07:38:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:04,747 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2023-11-19 07:38:04,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,747 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2023-11-19 07:38:04,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 07:38:04,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:04,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:04,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:38:04,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:04,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1656240799, now seen corresponding path program 1 times [2023-11-19 07:38:04,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:04,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440344901] [2023-11-19 07:38:04,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:04,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:04,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:04,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:04,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440344901] [2023-11-19 07:38:04,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440344901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:04,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:04,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:04,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343774904] [2023-11-19 07:38:04,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:04,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:04,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:04,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:04,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:04,826 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:04,884 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2023-11-19 07:38:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-19 07:38:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:04,886 INFO L225 Difference]: With dead ends: 64 [2023-11-19 07:38:04,886 INFO L226 Difference]: Without dead ends: 64 [2023-11-19 07:38:04,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:04,887 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 109 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:04,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 87 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:04,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-19 07:38:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2023-11-19 07:38:04,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-11-19 07:38:04,907 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 10 [2023-11-19 07:38:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:04,907 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-11-19 07:38:04,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:04,908 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-11-19 07:38:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 07:38:04,910 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:04,911 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:38:04,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:04,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1877967093, now seen corresponding path program 1 times [2023-11-19 07:38:04,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:04,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795602873] [2023-11-19 07:38:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:04,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:04,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:05,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:05,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795602873] [2023-11-19 07:38:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795602873] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827267685] [2023-11-19 07:38:05,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:05,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:05,247 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:05,249 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:05,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:38:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:05,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 07:38:05,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:05,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:38:05,452 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-19 07:38:05,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:05,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:05,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:05,907 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:38:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:05,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827267685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:05,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:05,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-11-19 07:38:05,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973007802] [2023-11-19 07:38:05,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:05,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:38:05,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:05,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:38:05,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:38:05,936 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:06,248 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-11-19 07:38:06,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:06,249 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-19 07:38:06,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:06,249 INFO L225 Difference]: With dead ends: 67 [2023-11-19 07:38:06,250 INFO L226 Difference]: Without dead ends: 67 [2023-11-19 07:38:06,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:38:06,251 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 98 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:06,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 264 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:38:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-19 07:38:06,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2023-11-19 07:38:06,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.5348837209302326) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-11-19 07:38:06,256 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 12 [2023-11-19 07:38:06,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:06,257 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-11-19 07:38:06,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-11-19 07:38:06,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:38:06,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:06,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:06,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:38:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:06,479 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:06,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1541125410, now seen corresponding path program 1 times [2023-11-19 07:38:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:06,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650727188] [2023-11-19 07:38:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:06,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650727188] [2023-11-19 07:38:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650727188] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:06,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468311169] [2023-11-19 07:38:06,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:06,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:06,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:06,579 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:06,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:38:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:06,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:38:06,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:06,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:06,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:06,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468311169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:06,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:06,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:38:06,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000757554] [2023-11-19 07:38:06,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:06,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:38:06,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:38:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:38:06,817 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:07,081 INFO L93 Difference]: Finished difference Result 104 states and 118 transitions. [2023-11-19 07:38:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:38:07,082 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-19 07:38:07,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:07,083 INFO L225 Difference]: With dead ends: 104 [2023-11-19 07:38:07,084 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 07:38:07,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:38:07,085 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 240 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:07,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 254 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:07,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 07:38:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 61. [2023-11-19 07:38:07,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2023-11-19 07:38:07,104 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 14 [2023-11-19 07:38:07,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:07,104 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2023-11-19 07:38:07,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,109 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2023-11-19 07:38:07,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:38:07,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:07,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:07,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:07,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:38:07,333 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:07,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:07,334 INFO L85 PathProgramCache]: Analyzing trace with hash 272080406, now seen corresponding path program 1 times [2023-11-19 07:38:07,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:07,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433083694] [2023-11-19 07:38:07,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:07,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433083694] [2023-11-19 07:38:07,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433083694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:07,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068040614] [2023-11-19 07:38:07,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:07,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:07,536 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:07,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:38:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:07,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:38:07,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:07,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:07,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068040614] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:07,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:07,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 11 [2023-11-19 07:38:07,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173932666] [2023-11-19 07:38:07,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:07,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:07,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:07,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:07,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:07,807 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:07,962 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2023-11-19 07:38:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-19 07:38:07,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:07,964 INFO L225 Difference]: With dead ends: 60 [2023-11-19 07:38:07,964 INFO L226 Difference]: Without dead ends: 60 [2023-11-19 07:38:07,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:38:07,967 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 169 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:07,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 84 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:07,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-19 07:38:07,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-19 07:38:07,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 59 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2023-11-19 07:38:07,975 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 15 [2023-11-19 07:38:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:07,975 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2023-11-19 07:38:07,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2023-11-19 07:38:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:38:07,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:07,977 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:08,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:08,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:08,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:08,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:08,199 INFO L85 PathProgramCache]: Analyzing trace with hash -155442002, now seen corresponding path program 1 times [2023-11-19 07:38:08,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:08,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117592454] [2023-11-19 07:38:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:08,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117592454] [2023-11-19 07:38:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117592454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:08,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:08,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:38:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239363794] [2023-11-19 07:38:08,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:08,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:38:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:38:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:08,244 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:08,271 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-11-19 07:38:08,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:38:08,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 07:38:08,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:08,273 INFO L225 Difference]: With dead ends: 58 [2023-11-19 07:38:08,273 INFO L226 Difference]: Without dead ends: 58 [2023-11-19 07:38:08,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:38:08,274 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 32 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:08,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:08,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-19 07:38:08,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-19 07:38:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 47 states have (on average 1.446808510638298) internal successors, (68), 57 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2023-11-19 07:38:08,278 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 16 [2023-11-19 07:38:08,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:08,278 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2023-11-19 07:38:08,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,279 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2023-11-19 07:38:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:38:08,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:08,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:08,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-19 07:38:08,280 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:08,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash -155442001, now seen corresponding path program 1 times [2023-11-19 07:38:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:08,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557829631] [2023-11-19 07:38:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:08,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:08,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557829631] [2023-11-19 07:38:08,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557829631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:08,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:08,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:08,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790357951] [2023-11-19 07:38:08,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:08,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:08,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:08,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:08,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:08,408 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:08,476 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-11-19 07:38:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:08,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 07:38:08,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:08,478 INFO L225 Difference]: With dead ends: 87 [2023-11-19 07:38:08,478 INFO L226 Difference]: Without dead ends: 87 [2023-11-19 07:38:08,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:08,479 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:08,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 110 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-19 07:38:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2023-11-19 07:38:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 62 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-11-19 07:38:08,483 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 16 [2023-11-19 07:38:08,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:08,483 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-11-19 07:38:08,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-11-19 07:38:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 07:38:08,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:08,484 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:08,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:38:08,484 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:08,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:08,485 INFO L85 PathProgramCache]: Analyzing trace with hash -742248015, now seen corresponding path program 1 times [2023-11-19 07:38:08,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:08,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402742439] [2023-11-19 07:38:08,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:08,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:08,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402742439] [2023-11-19 07:38:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402742439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:08,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406317377] [2023-11-19 07:38:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:08,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:08,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:08,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:08,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:38:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:08,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 07:38:08,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:08,871 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 8 treesize of output 1 [2023-11-19 07:38:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:08,989 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:08,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406317377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:08,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:08,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-19 07:38:08,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443682391] [2023-11-19 07:38:08,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:08,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:08,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:08,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:38:08,991 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:09,026 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2023-11-19 07:38:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:09,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-19 07:38:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:09,027 INFO L225 Difference]: With dead ends: 62 [2023-11-19 07:38:09,027 INFO L226 Difference]: Without dead ends: 62 [2023-11-19 07:38:09,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:38:09,028 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 101 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:09,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 35 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:09,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-19 07:38:09,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2023-11-19 07:38:09,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2023-11-19 07:38:09,031 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2023-11-19 07:38:09,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:09,031 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2023-11-19 07:38:09,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,032 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2023-11-19 07:38:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 07:38:09,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:09,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:09,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:09,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-19 07:38:09,249 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:09,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:09,249 INFO L85 PathProgramCache]: Analyzing trace with hash -907528666, now seen corresponding path program 1 times [2023-11-19 07:38:09,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:09,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487743840] [2023-11-19 07:38:09,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:09,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:09,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:09,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:09,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487743840] [2023-11-19 07:38:09,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487743840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:09,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238173480] [2023-11-19 07:38:09,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:09,585 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:38:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:09,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:38:09,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:09,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-19 07:38:09,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:38:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:38:09,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:09,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238173480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:09,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:09,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2023-11-19 07:38:09,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808809208] [2023-11-19 07:38:09,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:09,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:09,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:09,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:38:09,883 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:09,967 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2023-11-19 07:38:09,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-19 07:38:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:09,969 INFO L225 Difference]: With dead ends: 56 [2023-11-19 07:38:09,969 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 07:38:09,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:38:09,970 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:09,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 82 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 07:38:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-19 07:38:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2023-11-19 07:38:09,973 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 18 [2023-11-19 07:38:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:09,973 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2023-11-19 07:38:09,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2023-11-19 07:38:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:38:09,974 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:09,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:10,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:10,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-19 07:38:10,197 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:10,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash -797898659, now seen corresponding path program 1 times [2023-11-19 07:38:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:10,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835524411] [2023-11-19 07:38:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:10,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835524411] [2023-11-19 07:38:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835524411] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:10,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:10,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:10,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050384187] [2023-11-19 07:38:10,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:10,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:10,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:10,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:10,299 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:10,350 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-11-19 07:38:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:10,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:38:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:10,351 INFO L225 Difference]: With dead ends: 53 [2023-11-19 07:38:10,352 INFO L226 Difference]: Without dead ends: 53 [2023-11-19 07:38:10,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:10,353 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:10,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 64 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:10,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-19 07:38:10,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-19 07:38:10,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 47 states have (on average 1.3404255319148937) internal successors, (63), 52 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-11-19 07:38:10,356 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 19 [2023-11-19 07:38:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:10,356 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-11-19 07:38:10,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,357 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-11-19 07:38:10,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 07:38:10,358 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:10,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:10,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-19 07:38:10,358 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:10,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:10,358 INFO L85 PathProgramCache]: Analyzing trace with hash -797898658, now seen corresponding path program 1 times [2023-11-19 07:38:10,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:10,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667339626] [2023-11-19 07:38:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:10,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:10,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667339626] [2023-11-19 07:38:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667339626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:10,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450930887] [2023-11-19 07:38:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:10,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:10,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:10,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:10,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:38:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:10,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-19 07:38:10,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:10,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:10,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:10,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-11-19 07:38:10,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:10,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450930887] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:10,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:10,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2023-11-19 07:38:10,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880583035] [2023-11-19 07:38:10,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:10,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:38:10,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:38:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:38:10,772 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:10,937 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2023-11-19 07:38:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:38:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-19 07:38:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:10,938 INFO L225 Difference]: With dead ends: 72 [2023-11-19 07:38:10,938 INFO L226 Difference]: Without dead ends: 72 [2023-11-19 07:38:10,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:38:10,941 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 115 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:10,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 116 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:10,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-19 07:38:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2023-11-19 07:38:10,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.3461538461538463) internal successors, (70), 57 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2023-11-19 07:38:10,945 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 19 [2023-11-19 07:38:10,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2023-11-19 07:38:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2023-11-19 07:38:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:38:10,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:10,951 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:10,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:11,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:38:11,172 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:11,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:11,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2019918523, now seen corresponding path program 1 times [2023-11-19 07:38:11,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:11,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374949467] [2023-11-19 07:38:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:11,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:11,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:11,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:11,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374949467] [2023-11-19 07:38:11,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374949467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:11,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:11,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:38:11,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004755390] [2023-11-19 07:38:11,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:11,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:11,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:11,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:11,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:11,245 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:11,277 INFO L93 Difference]: Finished difference Result 118 states and 137 transitions. [2023-11-19 07:38:11,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:38:11,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:11,278 INFO L225 Difference]: With dead ends: 118 [2023-11-19 07:38:11,278 INFO L226 Difference]: Without dead ends: 118 [2023-11-19 07:38:11,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:11,279 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 54 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:11,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-19 07:38:11,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 86. [2023-11-19 07:38:11,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.275) internal successors, (102), 85 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2023-11-19 07:38:11,286 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 21 [2023-11-19 07:38:11,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:11,286 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2023-11-19 07:38:11,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:11,287 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2023-11-19 07:38:11,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:38:11,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:11,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:11,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:38:11,288 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2018536375, now seen corresponding path program 1 times [2023-11-19 07:38:11,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:11,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815219837] [2023-11-19 07:38:11,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:11,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:11,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815219837] [2023-11-19 07:38:11,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815219837] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:11,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865356690] [2023-11-19 07:38:11,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:11,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:11,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:11,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:11,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:38:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:11,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-19 07:38:11,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:11,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:12,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-19 07:38:12,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-19 07:38:12,436 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-11-19 07:38:12,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 10 [2023-11-19 07:38:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:12,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:12,673 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:12,674 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-11-19 07:38:12,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:12,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 32 [2023-11-19 07:38:12,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:13,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865356690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:13,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:13,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-11-19 07:38:13,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128742039] [2023-11-19 07:38:13,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:13,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:38:13,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:13,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:38:13,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=771, Unknown=12, NotChecked=0, Total=870 [2023-11-19 07:38:13,010 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:15,388 INFO L93 Difference]: Finished difference Result 187 states and 216 transitions. [2023-11-19 07:38:15,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:38:15,389 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:38:15,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:15,391 INFO L225 Difference]: With dead ends: 187 [2023-11-19 07:38:15,392 INFO L226 Difference]: Without dead ends: 187 [2023-11-19 07:38:15,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=657, Invalid=2411, Unknown=12, NotChecked=0, Total=3080 [2023-11-19 07:38:15,394 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 742 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:15,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 391 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:38:15,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-19 07:38:15,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 118. [2023-11-19 07:38:15,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 117 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 142 transitions. [2023-11-19 07:38:15,400 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 142 transitions. Word has length 21 [2023-11-19 07:38:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:15,400 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 142 transitions. [2023-11-19 07:38:15,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 142 transitions. [2023-11-19 07:38:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-19 07:38:15,401 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:15,402 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:15,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:15,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:38:15,613 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:15,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash 431570621, now seen corresponding path program 1 times [2023-11-19 07:38:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996941102] [2023-11-19 07:38:15,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:15,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:15,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996941102] [2023-11-19 07:38:15,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996941102] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:15,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:15,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881647990] [2023-11-19 07:38:15,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:15,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:15,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:15,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:15,712 INFO L87 Difference]: Start difference. First operand 118 states and 142 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:15,742 INFO L93 Difference]: Finished difference Result 129 states and 152 transitions. [2023-11-19 07:38:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-19 07:38:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:15,745 INFO L225 Difference]: With dead ends: 129 [2023-11-19 07:38:15,746 INFO L226 Difference]: Without dead ends: 129 [2023-11-19 07:38:15,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:15,747 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:15,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 75 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-19 07:38:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 79. [2023-11-19 07:38:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 78 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2023-11-19 07:38:15,753 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 21 [2023-11-19 07:38:15,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:15,754 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2023-11-19 07:38:15,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,754 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2023-11-19 07:38:15,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 07:38:15,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:15,756 INFO L195 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] [2023-11-19 07:38:15,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-19 07:38:15,757 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:15,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1849883305, now seen corresponding path program 1 times [2023-11-19 07:38:15,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:15,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108204905] [2023-11-19 07:38:15,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:15,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:15,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108204905] [2023-11-19 07:38:15,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108204905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:15,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:15,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:15,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458642577] [2023-11-19 07:38:15,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:15,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:38:15,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:15,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:38:15,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:38:15,866 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:15,939 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2023-11-19 07:38:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:38:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-19 07:38:15,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:15,940 INFO L225 Difference]: With dead ends: 78 [2023-11-19 07:38:15,940 INFO L226 Difference]: Without dead ends: 78 [2023-11-19 07:38:15,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:38:15,942 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 69 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:15,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 91 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:15,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-19 07:38:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-19 07:38:15,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.273972602739726) internal successors, (93), 77 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2023-11-19 07:38:15,946 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 22 [2023-11-19 07:38:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:15,948 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2023-11-19 07:38:15,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2023-11-19 07:38:15,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 07:38:15,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:15,949 INFO L195 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] [2023-11-19 07:38:15,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-19 07:38:15,949 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:15,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1849883304, now seen corresponding path program 1 times [2023-11-19 07:38:15,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:15,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236890307] [2023-11-19 07:38:15,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:15,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:16,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:16,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236890307] [2023-11-19 07:38:16,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236890307] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:16,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:16,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:38:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031766370] [2023-11-19 07:38:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:16,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:16,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:38:16,220 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:16,444 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2023-11-19 07:38:16,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-19 07:38:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:16,445 INFO L225 Difference]: With dead ends: 87 [2023-11-19 07:38:16,446 INFO L226 Difference]: Without dead ends: 87 [2023-11-19 07:38:16,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:38:16,447 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 126 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:16,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 107 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:16,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-19 07:38:16,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2023-11-19 07:38:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 79 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2023-11-19 07:38:16,451 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 22 [2023-11-19 07:38:16,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:16,451 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2023-11-19 07:38:16,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:16,452 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2023-11-19 07:38:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 07:38:16,452 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:16,453 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-19 07:38:16,453 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:16,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash -76161491, now seen corresponding path program 2 times [2023-11-19 07:38:16,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:16,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716394998] [2023-11-19 07:38:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716394998] [2023-11-19 07:38:17,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716394998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:17,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126741443] [2023-11-19 07:38:17,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:38:17,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:17,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:17,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:17,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:38:17,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:38:17,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:17,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:38:17,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:17,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:17,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 07:38:17,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:38:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:17,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:17,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:17,793 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-11-19 07:38:17,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:17,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2023-11-19 07:38:18,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:18,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126741443] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:18,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:18,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 31 [2023-11-19 07:38:18,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649013872] [2023-11-19 07:38:18,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:18,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-19 07:38:18,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:18,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-19 07:38:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=836, Unknown=9, NotChecked=0, Total=930 [2023-11-19 07:38:18,096 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:21,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:21,829 INFO L93 Difference]: Finished difference Result 335 states and 385 transitions. [2023-11-19 07:38:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-19 07:38:21,830 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-19 07:38:21,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:21,832 INFO L225 Difference]: With dead ends: 335 [2023-11-19 07:38:21,832 INFO L226 Difference]: Without dead ends: 335 [2023-11-19 07:38:21,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=843, Invalid=5467, Unknown=10, NotChecked=0, Total=6320 [2023-11-19 07:38:21,836 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 795 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:21,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [795 Valid, 1260 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:38:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-11-19 07:38:21,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 124. [2023-11-19 07:38:21,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 123 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2023-11-19 07:38:21,847 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 27 [2023-11-19 07:38:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:21,847 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2023-11-19 07:38:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2023-11-19 07:38:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:38:21,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:21,848 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:21,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:38:22,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-19 07:38:22,065 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:22,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:22,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2028013477, now seen corresponding path program 1 times [2023-11-19 07:38:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:22,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603166638] [2023-11-19 07:38:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:22,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:22,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:22,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603166638] [2023-11-19 07:38:22,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603166638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:22,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:22,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:38:22,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082639038] [2023-11-19 07:38:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:38:22,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:38:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:38:22,175 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:22,212 INFO L93 Difference]: Finished difference Result 191 states and 223 transitions. [2023-11-19 07:38:22,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:38:22,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 07:38:22,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:22,214 INFO L225 Difference]: With dead ends: 191 [2023-11-19 07:38:22,215 INFO L226 Difference]: Without dead ends: 191 [2023-11-19 07:38:22,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:38:22,217 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 33 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:22,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 157 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:22,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-19 07:38:22,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 172. [2023-11-19 07:38:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.2275449101796407) internal successors, (205), 171 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 205 transitions. [2023-11-19 07:38:22,222 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 205 transitions. Word has length 28 [2023-11-19 07:38:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:22,222 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 205 transitions. [2023-11-19 07:38:22,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 205 transitions. [2023-11-19 07:38:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:38:22,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:22,224 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:22,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-19 07:38:22,224 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:22,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1893999971, now seen corresponding path program 1 times [2023-11-19 07:38:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:22,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934613304] [2023-11-19 07:38:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:22,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:22,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:22,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934613304] [2023-11-19 07:38:22,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934613304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:22,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39421375] [2023-11-19 07:38:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:22,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:22,425 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:22,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:38:22,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:22,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-19 07:38:22,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:22,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:38:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:22,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:38:22,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39421375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:22,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:38:22,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2023-11-19 07:38:22,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564960812] [2023-11-19 07:38:22,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:22,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:38:22,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:22,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:38:22,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:38:22,637 INFO L87 Difference]: Start difference. First operand 172 states and 205 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:22,771 INFO L93 Difference]: Finished difference Result 248 states and 288 transitions. [2023-11-19 07:38:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:38:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 07:38:22,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:22,773 INFO L225 Difference]: With dead ends: 248 [2023-11-19 07:38:22,773 INFO L226 Difference]: Without dead ends: 248 [2023-11-19 07:38:22,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:38:22,774 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 43 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:22,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 219 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:22,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-11-19 07:38:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2023-11-19 07:38:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.217616580310881) internal successors, (235), 197 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 235 transitions. [2023-11-19 07:38:22,780 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 235 transitions. Word has length 28 [2023-11-19 07:38:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:22,780 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 235 transitions. [2023-11-19 07:38:22,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 235 transitions. [2023-11-19 07:38:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:38:22,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:22,781 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:22,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:22,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:22,989 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:22,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:22,989 INFO L85 PathProgramCache]: Analyzing trace with hash 2034548581, now seen corresponding path program 1 times [2023-11-19 07:38:22,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:22,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98387673] [2023-11-19 07:38:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:22,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:23,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98387673] [2023-11-19 07:38:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98387673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558032437] [2023-11-19 07:38:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:23,189 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:23,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:38:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:23,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:38:23,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:23,411 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 14 treesize of output 10 [2023-11-19 07:38:23,608 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-19 07:38:23,610 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:23,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2023-11-19 07:38:23,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:23,635 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:23,747 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 13 treesize of output 11 [2023-11-19 07:38:23,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2023-11-19 07:38:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558032437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:23,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2023-11-19 07:38:23,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096383249] [2023-11-19 07:38:23,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:23,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 07:38:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 07:38:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:38:23,941 INFO L87 Difference]: Start difference. First operand 198 states and 235 transitions. Second operand has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:24,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:24,960 INFO L93 Difference]: Finished difference Result 261 states and 300 transitions. [2023-11-19 07:38:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:38:24,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-19 07:38:24,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:24,962 INFO L225 Difference]: With dead ends: 261 [2023-11-19 07:38:24,963 INFO L226 Difference]: Without dead ends: 261 [2023-11-19 07:38:24,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=345, Invalid=1547, Unknown=0, NotChecked=0, Total=1892 [2023-11-19 07:38:24,964 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 349 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:24,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 470 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:38:24,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-19 07:38:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 182. [2023-11-19 07:38:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2372881355932204) internal successors, (219), 181 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 219 transitions. [2023-11-19 07:38:24,971 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 219 transitions. Word has length 28 [2023-11-19 07:38:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:24,971 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 219 transitions. [2023-11-19 07:38:24,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.72) internal successors, (68), 25 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 219 transitions. [2023-11-19 07:38:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:38:24,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:24,972 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:25,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:25,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:25,197 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:25,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:25,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1604800870, now seen corresponding path program 1 times [2023-11-19 07:38:25,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:25,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471238276] [2023-11-19 07:38:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:25,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:25,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:25,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:25,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471238276] [2023-11-19 07:38:25,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471238276] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:25,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:25,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:38:25,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367664274] [2023-11-19 07:38:25,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:25,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:38:25,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:25,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:38:25,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:25,379 INFO L87 Difference]: Start difference. First operand 182 states and 219 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:25,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:25,401 INFO L93 Difference]: Finished difference Result 181 states and 218 transitions. [2023-11-19 07:38:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:38:25,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-19 07:38:25,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:25,405 INFO L225 Difference]: With dead ends: 181 [2023-11-19 07:38:25,406 INFO L226 Difference]: Without dead ends: 134 [2023-11-19 07:38:25,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:38:25,407 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:25,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 64 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:38:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-19 07:38:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2023-11-19 07:38:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.16) internal successors, (145), 128 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 145 transitions. [2023-11-19 07:38:25,411 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 145 transitions. Word has length 29 [2023-11-19 07:38:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:25,411 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 145 transitions. [2023-11-19 07:38:25,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 145 transitions. [2023-11-19 07:38:25,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:38:25,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:25,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-19 07:38:25,413 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:25,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -36199480, now seen corresponding path program 1 times [2023-11-19 07:38:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779837147] [2023-11-19 07:38:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:25,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:26,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:26,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779837147] [2023-11-19 07:38:26,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779837147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:26,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074144558] [2023-11-19 07:38:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:26,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:26,240 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:26,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:38:26,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:26,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-19 07:38:26,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:26,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:26,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-19 07:38:26,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-19 07:38:27,107 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2023-11-19 07:38:27,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 20 [2023-11-19 07:38:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:27,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:27,311 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_343 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_343) |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (= 0 (select .cse0 (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1))) (= (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) 0)))) is different from false [2023-11-19 07:38:27,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:27,346 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 37 [2023-11-19 07:38:27,361 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:27,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 61 [2023-11-19 07:38:27,385 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:27,385 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 21 treesize of output 15 [2023-11-19 07:38:27,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:27,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074144558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:27,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:27,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2023-11-19 07:38:27,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335510999] [2023-11-19 07:38:27,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:27,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-19 07:38:27,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-19 07:38:27,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1137, Unknown=1, NotChecked=68, Total=1332 [2023-11-19 07:38:27,868 INFO L87 Difference]: Start difference. First operand 129 states and 145 transitions. Second operand has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:30,234 INFO L93 Difference]: Finished difference Result 205 states and 225 transitions. [2023-11-19 07:38:30,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 07:38:30,234 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-19 07:38:30,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:30,235 INFO L225 Difference]: With dead ends: 205 [2023-11-19 07:38:30,236 INFO L226 Difference]: Without dead ends: 194 [2023-11-19 07:38:30,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=709, Invalid=2954, Unknown=1, NotChecked=118, Total=3782 [2023-11-19 07:38:30,237 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 442 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:30,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 456 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 465 Invalid, 0 Unknown, 118 Unchecked, 0.4s Time] [2023-11-19 07:38:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-19 07:38:30,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2023-11-19 07:38:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.1619718309859155) internal successors, (165), 145 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 165 transitions. [2023-11-19 07:38:30,253 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 165 transitions. Word has length 29 [2023-11-19 07:38:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:30,253 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 165 transitions. [2023-11-19 07:38:30,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 165 transitions. [2023-11-19 07:38:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 07:38:30,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:30,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:30,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:30,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:30,475 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:30,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash -368267224, now seen corresponding path program 2 times [2023-11-19 07:38:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:30,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765096563] [2023-11-19 07:38:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:30,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:38:30,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:30,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765096563] [2023-11-19 07:38:30,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765096563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:38:30,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:38:30,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-19 07:38:30,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981022984] [2023-11-19 07:38:30,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:38:30,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:38:30,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:38:30,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:38:30,739 INFO L87 Difference]: Start difference. First operand 146 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:30,894 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2023-11-19 07:38:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:38:30,895 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-11-19 07:38:30,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:30,896 INFO L225 Difference]: With dead ends: 208 [2023-11-19 07:38:30,896 INFO L226 Difference]: Without dead ends: 183 [2023-11-19 07:38:30,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:38:30,897 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 71 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:30,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 194 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:38:30,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-19 07:38:30,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 149. [2023-11-19 07:38:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 145 states have (on average 1.1724137931034482) internal successors, (170), 148 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2023-11-19 07:38:30,902 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 32 [2023-11-19 07:38:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:30,902 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2023-11-19 07:38:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:30,903 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2023-11-19 07:38:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 07:38:30,903 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:30,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-19 07:38:30,904 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:30,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1439125859, now seen corresponding path program 3 times [2023-11-19 07:38:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:30,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624352804] [2023-11-19 07:38:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:30,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:31,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624352804] [2023-11-19 07:38:31,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624352804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882811420] [2023-11-19 07:38:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:38:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:31,549 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:31,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:38:31,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:38:31,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:31,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-19 07:38:31,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:31,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:32,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-19 07:38:32,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:38:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:32,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:32,287 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_389 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_389) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2023-11-19 07:38:32,295 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:32,295 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2023-11-19 07:38:32,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:32,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 34 [2023-11-19 07:38:32,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-19 07:38:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:38:32,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882811420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:32,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:32,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2023-11-19 07:38:32,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395688032] [2023-11-19 07:38:32,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:32,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-19 07:38:32,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:32,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-19 07:38:32,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1096, Unknown=1, NotChecked=66, Total=1260 [2023-11-19 07:38:32,645 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:35,938 INFO L93 Difference]: Finished difference Result 300 states and 326 transitions. [2023-11-19 07:38:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-19 07:38:35,939 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-19 07:38:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:35,940 INFO L225 Difference]: With dead ends: 300 [2023-11-19 07:38:35,941 INFO L226 Difference]: Without dead ends: 255 [2023-11-19 07:38:35,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=663, Invalid=5040, Unknown=1, NotChecked=148, Total=5852 [2023-11-19 07:38:35,943 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 530 mSDsluCounter, 1031 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:35,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1078 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1492 Invalid, 0 Unknown, 176 Unchecked, 1.0s Time] [2023-11-19 07:38:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-19 07:38:35,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2023-11-19 07:38:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 171 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 195 transitions. [2023-11-19 07:38:35,949 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 195 transitions. Word has length 33 [2023-11-19 07:38:35,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:35,950 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 195 transitions. [2023-11-19 07:38:35,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:35,950 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 195 transitions. [2023-11-19 07:38:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:38:35,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:35,951 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:35,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:36,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:36,161 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:36,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 722081790, now seen corresponding path program 2 times [2023-11-19 07:38:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855999390] [2023-11-19 07:38:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:36,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855999390] [2023-11-19 07:38:37,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855999390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981434781] [2023-11-19 07:38:37,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:38:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:37,351 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:37,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:38:37,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:38:37,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:38:37,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-19 07:38:37,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:37,949 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 16 treesize of output 12 [2023-11-19 07:38:38,040 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-11-19 07:38:38,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-11-19 07:38:38,660 INFO L349 Elim1Store]: treesize reduction 33, result has 37.7 percent of original size [2023-11-19 07:38:38,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 37 [2023-11-19 07:38:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:38,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:39,050 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 53 treesize of output 47 [2023-11-19 07:38:39,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:38:39,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 46 [2023-11-19 07:38:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:38:39,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981434781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:39,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:39,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 17] total 45 [2023-11-19 07:38:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047819320] [2023-11-19 07:38:39,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-19 07:38:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-19 07:38:39,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 07:38:39,595 INFO L87 Difference]: Start difference. First operand 172 states and 195 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:43,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:43,202 INFO L93 Difference]: Finished difference Result 297 states and 327 transitions. [2023-11-19 07:38:43,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-19 07:38:43,203 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-19 07:38:43,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:43,204 INFO L225 Difference]: With dead ends: 297 [2023-11-19 07:38:43,205 INFO L226 Difference]: Without dead ends: 273 [2023-11-19 07:38:43,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=980, Invalid=4872, Unknown=0, NotChecked=0, Total=5852 [2023-11-19 07:38:43,208 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 594 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:43,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [594 Valid, 566 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-19 07:38:43,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-19 07:38:43,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 188. [2023-11-19 07:38:43,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.1630434782608696) internal successors, (214), 187 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:43,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 214 transitions. [2023-11-19 07:38:43,214 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 214 transitions. Word has length 35 [2023-11-19 07:38:43,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:43,214 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 214 transitions. [2023-11-19 07:38:43,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:43,215 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 214 transitions. [2023-11-19 07:38:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 07:38:43,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:43,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:43,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:43,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-19 07:38:43,437 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:43,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:43,437 INFO L85 PathProgramCache]: Analyzing trace with hash 937802411, now seen corresponding path program 1 times [2023-11-19 07:38:43,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:43,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801639759] [2023-11-19 07:38:43,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:43,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:38:43,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:38:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801639759] [2023-11-19 07:38:43,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801639759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:38:43,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670733971] [2023-11-19 07:38:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:43,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:43,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:38:43,790 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:38:43,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:38:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:38:43,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:38:43,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:38:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:38:44,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:38:44,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:38:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:38:44,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670733971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:38:44,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:38:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2023-11-19 07:38:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657800055] [2023-11-19 07:38:44,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:38:44,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-19 07:38:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:38:44,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-19 07:38:44,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:38:44,236 INFO L87 Difference]: Start difference. First operand 188 states and 214 transitions. Second operand has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:44,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:38:44,592 INFO L93 Difference]: Finished difference Result 227 states and 251 transitions. [2023-11-19 07:38:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:38:44,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-19 07:38:44,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:38:44,594 INFO L225 Difference]: With dead ends: 227 [2023-11-19 07:38:44,594 INFO L226 Difference]: Without dead ends: 227 [2023-11-19 07:38:44,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2023-11-19 07:38:44,596 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 172 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:38:44,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 247 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:38:44,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-19 07:38:44,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 206. [2023-11-19 07:38:44,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 202 states have (on average 1.1485148514851484) internal successors, (232), 205 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:44,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2023-11-19 07:38:44,603 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 36 [2023-11-19 07:38:44,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:38:44,603 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2023-11-19 07:38:44,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.869565217391304) internal successors, (66), 24 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:38:44,604 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2023-11-19 07:38:44,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 07:38:44,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:38:44,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:38:44,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:38:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b81d4b2-f2b4-4743-aa79-1fb5d8a21882/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:38:44,822 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2023-11-19 07:38:44,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:38:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 824829273, now seen corresponding path program 4 times [2023-11-19 07:38:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:38:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704618429] [2023-11-19 07:38:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:38:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:38:44,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat