./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/test25-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/test25-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx --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 04738ccb45e87cb71ee901a776c43e93b7c292454abcb1b1134d9ecc09485bab --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 20:57:48,150 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 20:57:48,306 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 20:57:48,318 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 20:57:48,320 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 20:57:48,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 20:57:48,361 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 20:57:48,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 20:57:48,364 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 20:57:48,370 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 20:57:48,372 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 20:57:48,373 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 20:57:48,374 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 20:57:48,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 20:57:48,377 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 20:57:48,378 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 20:57:48,379 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 20:57:48,379 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 20:57:48,380 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 20:57:48,381 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 20:57:48,381 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 20:57:48,382 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 20:57:48,383 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 20:57:48,384 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 20:57:48,384 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 20:57:48,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 20:57:48,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 20:57:48,387 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 20:57:48,388 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 20:57:48,388 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 20:57:48,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:48,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 20:57:48,392 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 20:57:48,392 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 20:57:48,392 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 20:57:48,393 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 20:57:48,393 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 20:57:48,394 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 20:57:48,394 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 20:57:48,395 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_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04738ccb45e87cb71ee901a776c43e93b7c292454abcb1b1134d9ecc09485bab [2023-11-21 20:57:48,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 20:57:48,806 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 20:57:48,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 20:57:48,812 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 20:57:48,813 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 20:57:48,815 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/ldv-regression/test25-2.c [2023-11-21 20:57:52,575 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 20:57:52,778 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 20:57:52,779 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/sv-benchmarks/c/ldv-regression/test25-2.c [2023-11-21 20:57:52,787 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/data/776892fa0/8294b0bfc1fc4df9bfb84ed6d6c4186b/FLAG9b2c67452 [2023-11-21 20:57:52,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/data/776892fa0/8294b0bfc1fc4df9bfb84ed6d6c4186b [2023-11-21 20:57:52,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 20:57:52,807 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 20:57:52,808 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:52,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 20:57:52,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 20:57:52,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:52" (1/1) ... [2023-11-21 20:57:52,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5951a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:52, skipping insertion in model container [2023-11-21 20:57:52,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 08:57:52" (1/1) ... [2023-11-21 20:57:52,839 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 20:57:53,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:53,012 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 20:57:53,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 20:57:53,055 INFO L206 MainTranslator]: Completed translation [2023-11-21 20:57:53,055 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53 WrapperNode [2023-11-21 20:57:53,056 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 20:57:53,057 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:53,057 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 20:57:53,058 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 20:57:53,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,079 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,104 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 93 [2023-11-21 20:57:53,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 20:57:53,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 20:57:53,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 20:57:53,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 20:57:53,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,127 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,131 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,133 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,138 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 20:57:53,139 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 20:57:53,139 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 20:57:53,139 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 20:57:53,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (1/1) ... [2023-11-21 20:57:53,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 20:57:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:53,181 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 20:57:53,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 20:57:53,230 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 20:57:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 20:57:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 20:57:53,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 20:57:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 20:57:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 20:57:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 20:57:53,232 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 20:57:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 20:57:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 20:57:53,337 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 20:57:53,339 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 20:57:53,637 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 20:57:53,708 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 20:57:53,709 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 20:57:53,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:53 BoogieIcfgContainer [2023-11-21 20:57:53,711 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 20:57:53,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 20:57:53,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 20:57:53,717 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 20:57:53,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 08:57:52" (1/3) ... [2023-11-21 20:57:53,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a90287e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:53, skipping insertion in model container [2023-11-21 20:57:53,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 08:57:53" (2/3) ... [2023-11-21 20:57:53,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a90287e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 08:57:53, skipping insertion in model container [2023-11-21 20:57:53,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 08:57:53" (3/3) ... [2023-11-21 20:57:53,721 INFO L112 eAbstractionObserver]: Analyzing ICFG test25-2.c [2023-11-21 20:57:53,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 20:57:53,759 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2023-11-21 20:57:53,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 20:57:53,827 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;@789f27c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 20:57:53,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-11-21 20:57:53,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 20 states have (on average 2.4) internal successors, (48), 42 states have internal predecessors, (48), 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) [2023-11-21 20:57:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 20:57:53,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:53,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 20:57:53,838 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:53,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:53,844 INFO L85 PathProgramCache]: Analyzing trace with hash 125252, now seen corresponding path program 1 times [2023-11-21 20:57:53,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:53,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054448717] [2023-11-21 20:57:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:53,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:54,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:54,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054448717] [2023-11-21 20:57:54,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054448717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:54,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:54,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:54,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119137665] [2023-11-21 20:57:54,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:54,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:54,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:54,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:54,206 INFO L87 Difference]: Start difference. First operand has 43 states, 20 states have (on average 2.4) internal successors, (48), 42 states have internal predecessors, (48), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 20:57:54,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:54,313 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-11-21 20:57:54,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:54,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 20:57:54,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:54,326 INFO L225 Difference]: With dead ends: 40 [2023-11-21 20:57:54,327 INFO L226 Difference]: Without dead ends: 39 [2023-11-21 20:57:54,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:54,335 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:54,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:54,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-21 20:57:54,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-21 20:57:54,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 20 states have (on average 2.1) internal successors, (42), 38 states have internal predecessors, (42), 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) [2023-11-21 20:57:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-21 20:57:54,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 3 [2023-11-21 20:57:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-21 20:57:54,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 20:57:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-21 20:57:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 20:57:54,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:54,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 20:57:54,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 20:57:54,386 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:54,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:54,387 INFO L85 PathProgramCache]: Analyzing trace with hash 125253, now seen corresponding path program 1 times [2023-11-21 20:57:54,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:54,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386108362] [2023-11-21 20:57:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:54,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:54,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386108362] [2023-11-21 20:57:54,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386108362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:54,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:54,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 20:57:54,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086682620] [2023-11-21 20:57:54,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:54,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:54,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:54,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:54,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:54,565 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 20:57:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:54,635 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2023-11-21 20:57:54,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 20:57:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:54,637 INFO L225 Difference]: With dead ends: 42 [2023-11-21 20:57:54,637 INFO L226 Difference]: Without dead ends: 42 [2023-11-21 20:57:54,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 20:57:54,640 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:54,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-21 20:57:54,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-21 20:57:54,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 41 states have internal predecessors, (45), 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) [2023-11-21 20:57:54,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-11-21 20:57:54,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 3 [2023-11-21 20:57:54,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:54,653 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-11-21 20:57:54,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-21 20:57:54,654 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-11-21 20:57:54,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 20:57:54,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:54,654 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2023-11-21 20:57:54,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 20:57:54,655 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:54,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:54,657 INFO L85 PathProgramCache]: Analyzing trace with hash -560746808, now seen corresponding path program 1 times [2023-11-21 20:57:54,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494279373] [2023-11-21 20:57:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:54,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:54,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494279373] [2023-11-21 20:57:54,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494279373] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:54,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337395692] [2023-11-21 20:57:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:54,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:54,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:54,966 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:54,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 20:57:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:55,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:57:55,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:55,291 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 1 [2023-11-21 20:57:55,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:55,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:55,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337395692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:55,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:57:55,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-11-21 20:57:55,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629769511] [2023-11-21 20:57:55,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:55,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:57:55,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:55,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:57:55,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:57:55,528 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-11-21 20:57:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:55,716 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-21 20:57:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:57:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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 6 [2023-11-21 20:57:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:55,722 INFO L225 Difference]: With dead ends: 47 [2023-11-21 20:57:55,728 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 20:57:55,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-21 20:57:55,733 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:55,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 20:57:55,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-21 20:57:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 46 states have internal predecessors, (50), 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) [2023-11-21 20:57:55,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-11-21 20:57:55,751 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 6 [2023-11-21 20:57:55,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:55,751 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-11-21 20:57:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 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) [2023-11-21 20:57:55,752 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-11-21 20:57:55,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 20:57:55,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:55,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1] [2023-11-21 20:57:55,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:55,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:55,977 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:55,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 154694411, now seen corresponding path program 1 times [2023-11-21 20:57:55,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:55,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773969261] [2023-11-21 20:57:55,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:55,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:56,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:56,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773969261] [2023-11-21 20:57:56,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773969261] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:56,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333058373] [2023-11-21 20:57:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:56,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:56,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:56,344 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:56,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 20:57:56,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:56,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 20:57:56,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:56,514 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:56,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:57:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:57:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333058373] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:57:56,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:57:56,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-21 20:57:56,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94186824] [2023-11-21 20:57:56,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:57:56,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 20:57:56,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 20:57:56,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:57:56,604 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2023-11-21 20:57:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:56,704 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-11-21 20:57:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 20:57:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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 [2023-11-21 20:57:56,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:56,707 INFO L225 Difference]: With dead ends: 65 [2023-11-21 20:57:56,707 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 20:57:56,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-21 20:57:56,709 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 4 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:56,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 93 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 20:57:56,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-21 20:57:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 64 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) [2023-11-21 20:57:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-21 20:57:56,726 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 16 [2023-11-21 20:57:56,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:56,726 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-21 20:57:56,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 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) [2023-11-21 20:57:56,727 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-21 20:57:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 20:57:56,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:56,728 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-11-21 20:57:56,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:56,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:56,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash 931082155, now seen corresponding path program 2 times [2023-11-21 20:57:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:56,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829937408] [2023-11-21 20:57:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-21 20:57:57,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:57,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829937408] [2023-11-21 20:57:57,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829937408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:57,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:57,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:57:57,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624208462] [2023-11-21 20:57:57,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:57,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:57:57,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:57,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:57:57,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:57:57,396 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:57:57,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:57,440 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2023-11-21 20:57:57,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 34 [2023-11-21 20:57:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:57,443 INFO L225 Difference]: With dead ends: 62 [2023-11-21 20:57:57,443 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 20:57:57,443 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 [2023-11-21 20:57:57,444 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:57,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 20:57:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-21 20:57:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 61 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) [2023-11-21 20:57:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-11-21 20:57:57,451 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 34 [2023-11-21 20:57:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:57,451 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-11-21 20:57:57,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-21 20:57:57,452 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-11-21 20:57:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 20:57:57,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:57,453 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1] [2023-11-21 20:57:57,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 20:57:57,454 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:57,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:57,454 INFO L85 PathProgramCache]: Analyzing trace with hash 931082156, now seen corresponding path program 1 times [2023-11-21 20:57:57,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:57,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691380708] [2023-11-21 20:57:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:57,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-21 20:57:57,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:57,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691380708] [2023-11-21 20:57:57,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691380708] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:57:57,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151158244] [2023-11-21 20:57:57,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:57,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:57,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:57:57,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:57:57,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 20:57:58,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:58,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-21 20:57:58,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:57:58,214 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 1 [2023-11-21 20:57:58,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 20:57:58,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-11-21 20:57:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:57:58,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:57:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151158244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:58,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:57:58,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2] total 3 [2023-11-21 20:57:58,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582880276] [2023-11-21 20:57:58,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:58,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 20:57:58,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:58,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 20:57:58,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:58,430 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-11-21 20:57:58,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:58,471 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2023-11-21 20:57:58,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 20:57:58,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 34 [2023-11-21 20:57:58,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:58,473 INFO L225 Difference]: With dead ends: 59 [2023-11-21 20:57:58,473 INFO L226 Difference]: Without dead ends: 59 [2023-11-21 20:57:58,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:58,474 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:58,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-21 20:57:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-21 20:57:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 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) [2023-11-21 20:57:58,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-11-21 20:57:58,481 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 34 [2023-11-21 20:57:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:58,481 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-11-21 20:57:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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) [2023-11-21 20:57:58,482 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-11-21 20:57:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 20:57:58,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:58,483 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1] [2023-11-21 20:57:58,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 20:57:58,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:57:58,704 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:58,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:58,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1201169615, now seen corresponding path program 1 times [2023-11-21 20:57:58,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:58,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190027651] [2023-11-21 20:57:58,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:58,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:59,358 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:57:59,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:59,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190027651] [2023-11-21 20:57:59,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190027651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:59,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:59,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 20:57:59,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814241781] [2023-11-21 20:57:59,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:59,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:57:59,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:59,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:57:59,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:57:59,362 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-11-21 20:57:59,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:59,418 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2023-11-21 20:57:59,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 20:57:59,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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 35 [2023-11-21 20:57:59,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:59,423 INFO L225 Difference]: With dead ends: 58 [2023-11-21 20:57:59,423 INFO L226 Difference]: Without dead ends: 56 [2023-11-21 20:57:59,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:57:59,425 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:59,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 26 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:57:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-21 20:57:59,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-21 20:57:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 55 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) [2023-11-21 20:57:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-11-21 20:57:59,438 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 35 [2023-11-21 20:57:59,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:59,441 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-11-21 20:57:59,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) 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) [2023-11-21 20:57:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-11-21 20:57:59,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 20:57:59,445 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:59,445 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:59,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 20:57:59,446 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:59,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:59,447 INFO L85 PathProgramCache]: Analyzing trace with hash 969746587, now seen corresponding path program 1 times [2023-11-21 20:57:59,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:59,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777818266] [2023-11-21 20:57:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:59,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:57:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:57:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-21 20:57:59,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:57:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777818266] [2023-11-21 20:57:59,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777818266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:57:59,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:57:59,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:57:59,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010634648] [2023-11-21 20:57:59,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:57:59,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:57:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:57:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:57:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:57:59,874 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-11-21 20:57:59,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:57:59,949 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2023-11-21 20:57:59,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 20:57:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 37 [2023-11-21 20:57:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:57:59,952 INFO L225 Difference]: With dead ends: 55 [2023-11-21 20:57:59,952 INFO L226 Difference]: Without dead ends: 55 [2023-11-21 20:57:59,953 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 [2023-11-21 20:57:59,954 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:57:59,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:57:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-21 20:57:59,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-21 20:57:59,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 54 states have internal predecessors, (56), 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) [2023-11-21 20:57:59,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2023-11-21 20:57:59,976 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 37 [2023-11-21 20:57:59,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:57:59,977 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2023-11-21 20:57:59,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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) [2023-11-21 20:57:59,977 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2023-11-21 20:57:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-21 20:57:59,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:57:59,979 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:57:59,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 20:57:59,980 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:57:59,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:57:59,981 INFO L85 PathProgramCache]: Analyzing trace with hash 969746588, now seen corresponding path program 1 times [2023-11-21 20:57:59,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:57:59,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423765184] [2023-11-21 20:57:59,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:57:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423765184] [2023-11-21 20:58:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423765184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376579463] [2023-11-21 20:58:00,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:00,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:00,780 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 6 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) [2023-11-21 20:58:00,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:00,968 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2023-11-21 20:58:00,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:00,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 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 37 [2023-11-21 20:58:00,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:00,970 INFO L225 Difference]: With dead ends: 53 [2023-11-21 20:58:00,970 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 20:58:00,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-21 20:58:00,973 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:00,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 24 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 20:58:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-21 20:58:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.173913043478261) internal successors, (54), 52 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) [2023-11-21 20:58:00,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-11-21 20:58:00,980 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 37 [2023-11-21 20:58:00,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:00,983 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-11-21 20:58:00,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 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) [2023-11-21 20:58:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-11-21 20:58:00,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 20:58:00,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:00,990 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:00,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 20:58:00,990 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:00,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:00,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1770555199, now seen corresponding path program 1 times [2023-11-21 20:58:00,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:00,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224255530] [2023-11-21 20:58:00,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:00,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:01,206 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:01,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:01,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224255530] [2023-11-21 20:58:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224255530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:01,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:01,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 20:58:01,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145094928] [2023-11-21 20:58:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:01,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:01,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:01,211 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-21 20:58:01,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:01,285 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-11-21 20:58:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:58:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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 40 [2023-11-21 20:58:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:01,287 INFO L225 Difference]: With dead ends: 52 [2023-11-21 20:58:01,287 INFO L226 Difference]: Without dead ends: 52 [2023-11-21 20:58:01,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 20:58:01,288 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:01,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:58:01,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-21 20:58:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-21 20:58:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 51 states have internal predecessors, (53), 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) [2023-11-21 20:58:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-11-21 20:58:01,303 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 40 [2023-11-21 20:58:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:01,303 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-11-21 20:58:01,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 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) [2023-11-21 20:58:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-11-21 20:58:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 20:58:01,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:01,306 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:01,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 20:58:01,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:01,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:01,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1770555200, now seen corresponding path program 1 times [2023-11-21 20:58:01,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:01,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103813037] [2023-11-21 20:58:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:01,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:01,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:02,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:02,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103813037] [2023-11-21 20:58:02,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103813037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:02,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:02,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 20:58:02,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272586797] [2023-11-21 20:58:02,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:02,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 20:58:02,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:02,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 20:58:02,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-21 20:58:02,320 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-11-21 20:58:02,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:02,499 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-11-21 20:58:02,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 20:58:02,500 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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 40 [2023-11-21 20:58:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:02,502 INFO L225 Difference]: With dead ends: 51 [2023-11-21 20:58:02,502 INFO L226 Difference]: Without dead ends: 51 [2023-11-21 20:58:02,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-11-21 20:58:02,504 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 46 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:02,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 28 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-21 20:58:02,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-21 20:58:02,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 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) [2023-11-21 20:58:02,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-11-21 20:58:02,509 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 40 [2023-11-21 20:58:02,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:02,510 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-11-21 20:58:02,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 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) [2023-11-21 20:58:02,511 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-11-21 20:58:02,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 20:58:02,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:02,513 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:02,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 20:58:02,514 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash 116598237, now seen corresponding path program 1 times [2023-11-21 20:58:02,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:02,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202224895] [2023-11-21 20:58:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:02,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:02,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:02,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202224895] [2023-11-21 20:58:02,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202224895] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:02,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:58:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120093097] [2023-11-21 20:58:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:02,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 20:58:02,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 20:58:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 20:58:02,727 INFO L87 Difference]: Start difference. First operand 51 states and 52 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) [2023-11-21 20:58:02,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:02,760 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2023-11-21 20:58:02,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 20:58:02,761 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 43 [2023-11-21 20:58:02,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:02,762 INFO L225 Difference]: With dead ends: 50 [2023-11-21 20:58:02,762 INFO L226 Difference]: Without dead ends: 50 [2023-11-21 20:58:02,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:02,763 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:02,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 13 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:58:02,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-21 20:58:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-11-21 20:58:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.108695652173913) internal successors, (51), 49 states have internal predecessors, (51), 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) [2023-11-21 20:58:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-11-21 20:58:02,769 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2023-11-21 20:58:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:02,770 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-11-21 20:58:02,770 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) [2023-11-21 20:58:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-11-21 20:58:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 20:58:02,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:02,771 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:02,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 20:58:02,772 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:02,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 116598238, now seen corresponding path program 1 times [2023-11-21 20:58:02,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:02,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250715789] [2023-11-21 20:58:02,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:02,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:02,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:03,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:03,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250715789] [2023-11-21 20:58:03,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250715789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:03,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 20:58:03,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916252852] [2023-11-21 20:58:03,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:03,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 20:58:03,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:03,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 20:58:03,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 20:58:03,099 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 5 states, 4 states have (on average 4.0) 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) [2023-11-21 20:58:03,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:03,142 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-21 20:58:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 20:58:03,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) 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 43 [2023-11-21 20:58:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:03,143 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:58:03,143 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 20:58:03,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:03,145 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:03,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 13 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:58:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 20:58:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-21 20:58:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 48 states have internal predecessors, (50), 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) [2023-11-21 20:58:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-21 20:58:03,150 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 43 [2023-11-21 20:58:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:03,150 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-21 20:58:03,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) 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) [2023-11-21 20:58:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-21 20:58:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 20:58:03,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:03,151 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:03,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 20:58:03,152 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:03,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash -680421912, now seen corresponding path program 1 times [2023-11-21 20:58:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229211081] [2023-11-21 20:58:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:03,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229211081] [2023-11-21 20:58:03,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229211081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:03,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:03,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 20:58:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150306327] [2023-11-21 20:58:03,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:03,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 20:58:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 20:58:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-21 20:58:03,438 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-11-21 20:58:03,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:03,510 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-21 20:58:03,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 20:58:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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 44 [2023-11-21 20:58:03,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:03,511 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:58:03,511 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 20:58:03,512 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 [2023-11-21 20:58:03,512 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:03,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 25 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 20:58:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 20:58:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-21 20:58:03,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 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) [2023-11-21 20:58:03,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-21 20:58:03,515 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-11-21 20:58:03,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:03,516 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-21 20:58:03,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 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) [2023-11-21 20:58:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-21 20:58:03,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-21 20:58:03,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:03,517 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:03,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 20:58:03,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:03,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:03,518 INFO L85 PathProgramCache]: Analyzing trace with hash -680421911, now seen corresponding path program 1 times [2023-11-21 20:58:03,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:03,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248421958] [2023-11-21 20:58:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:03,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:04,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:04,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248421958] [2023-11-21 20:58:04,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248421958] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:04,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 20:58:04,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-21 20:58:04,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152705193] [2023-11-21 20:58:04,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:04,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 20:58:04,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:04,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 20:58:04,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-21 20:58:04,491 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2023-11-21 20:58:04,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:04,689 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2023-11-21 20:58:04,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 20:58:04,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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 44 [2023-11-21 20:58:04,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:04,691 INFO L225 Difference]: With dead ends: 47 [2023-11-21 20:58:04,691 INFO L226 Difference]: Without dead ends: 47 [2023-11-21 20:58:04,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-11-21 20:58:04,694 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:04,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:04,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-21 20:58:04,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-21 20:58:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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) [2023-11-21 20:58:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-11-21 20:58:04,700 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2023-11-21 20:58:04,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:04,700 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-11-21 20:58:04,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2023-11-21 20:58:04,701 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-11-21 20:58:04,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-21 20:58:04,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:04,702 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:04,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-21 20:58:04,702 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:04,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:04,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1050392424, now seen corresponding path program 1 times [2023-11-21 20:58:04,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:04,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986697401] [2023-11-21 20:58:04,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:04,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:05,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 30 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:16,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986697401] [2023-11-21 20:58:16,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986697401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:16,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496478347] [2023-11-21 20:58:16,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:16,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:16,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:16,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:16,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 20:58:16,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:16,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-21 20:58:16,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:17,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 20:58:17,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 20:58:17,372 INFO L349 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2023-11-21 20:58:17,373 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 60 treesize of output 12 [2023-11-21 20:58:17,417 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:17,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 20:58:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496478347] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 20:58:17,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 20:58:17,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [20] total 25 [2023-11-21 20:58:17,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511500491] [2023-11-21 20:58:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 20:58:17,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 20:58:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:17,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 20:58:17,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2023-11-21 20:58:17,425 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-11-21 20:58:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:17,544 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-21 20:58:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 20:58:17,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 46 [2023-11-21 20:58:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:17,545 INFO L225 Difference]: With dead ends: 49 [2023-11-21 20:58:17,545 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 20:58:17,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2023-11-21 20:58:17,547 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:17,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 20:58:17,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 20:58:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-21 20:58:17,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 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) [2023-11-21 20:58:17,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-11-21 20:58:17,549 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2023-11-21 20:58:17,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:17,550 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-11-21 20:58:17,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2023-11-21 20:58:17,550 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-11-21 20:58:17,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-21 20:58:17,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:17,551 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:17,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:17,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 20:58:17,751 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:17,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:17,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1965584817, now seen corresponding path program 1 times [2023-11-21 20:58:17,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:17,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743776488] [2023-11-21 20:58:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:17,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 20:58:24,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 20:58:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743776488] [2023-11-21 20:58:24,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743776488] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 20:58:24,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085063020] [2023-11-21 20:58:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:24,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 20:58:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 20:58:24,121 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 20:58:24,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 20:58:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 20:58:24,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-21 20:58:24,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 20:58:24,514 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 [2023-11-21 20:58:24,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-21 20:58:24,871 INFO L349 Elim1Store]: treesize reduction 37, result has 7.5 percent of original size [2023-11-21 20:58:24,872 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 60 treesize of output 12 [2023-11-21 20:58:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:24,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 20:58:25,121 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-11-21 20:58:25,122 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 18 [2023-11-21 20:58:25,264 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-21 20:58:25,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085063020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 20:58:25,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 20:58:25,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 9] total 36 [2023-11-21 20:58:25,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966336184] [2023-11-21 20:58:25,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 20:58:25,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 20:58:25,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 20:58:25,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 20:58:25,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1110, Unknown=0, NotChecked=0, Total=1260 [2023-11-21 20:58:25,268 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 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) [2023-11-21 20:58:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 20:58:26,653 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-11-21 20:58:26,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-21 20:58:26,654 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 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 48 [2023-11-21 20:58:26,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 20:58:26,655 INFO L225 Difference]: With dead ends: 57 [2023-11-21 20:58:26,655 INFO L226 Difference]: Without dead ends: 55 [2023-11-21 20:58:26,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=389, Invalid=3033, Unknown=0, NotChecked=0, Total=3422 [2023-11-21 20:58:26,660 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 20:58:26,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 12 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 20:58:26,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-21 20:58:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-11-21 20:58:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 states have internal predecessors, (56), 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) [2023-11-21 20:58:26,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2023-11-21 20:58:26,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 48 [2023-11-21 20:58:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 20:58:26,663 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2023-11-21 20:58:26,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 36 states have internal predecessors, (82), 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) [2023-11-21 20:58:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2023-11-21 20:58:26,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-21 20:58:26,664 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 20:58:26,664 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 20:58:26,688 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 20:58:26,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6996585a-9079-4812-9c10-81e0630d9033/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 20:58:26,886 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-11-21 20:58:26,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 20:58:26,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1741955204, now seen corresponding path program 2 times [2023-11-21 20:58:26,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 20:58:26,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643464580] [2023-11-21 20:58:26,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 20:58:26,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 20:58:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat