./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-queue-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-queue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ --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 c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 22:32:11,598 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 22:32:11,724 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-23 22:32:11,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 22:32:11,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 22:32:11,770 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 22:32:11,771 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 22:32:11,772 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 22:32:11,773 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 22:32:11,778 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 22:32:11,780 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 22:32:11,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 22:32:11,781 INFO L153 SettingsManager]: * Use SBE=true [2023-11-23 22:32:11,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 22:32:11,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 22:32:11,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 22:32:11,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 22:32:11,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 22:32:11,786 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 22:32:11,786 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 22:32:11,787 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 22:32:11,787 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 22:32:11,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 22:32:11,788 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 22:32:11,789 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 22:32:11,789 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 22:32:11,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 22:32:11,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 22:32:11,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 22:32:11,792 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 22:32:11,793 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:11,794 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 22:32:11,794 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 22:32:11,794 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-23 22:32:11,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 22:32:11,795 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 22:32:11,795 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-23 22:32:11,795 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-23 22:32:11,796 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 22:32:11,796 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_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c858394bc83ab2c402eb20052f936c0a6aa98b2b6b6c704be79c039778bcff97 [2023-11-23 22:32:12,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 22:32:12,149 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 22:32:12,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 22:32:12,153 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 22:32:12,154 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 22:32:12,155 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/../../sv-benchmarks/c/forester-heap/dll-queue-1.i [2023-11-23 22:32:15,200 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 22:32:15,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 22:32:15,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/sv-benchmarks/c/forester-heap/dll-queue-1.i [2023-11-23 22:32:15,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/data/39cb91373/35911ee6c5f143989191f83cfe812dfe/FLAGb42f3c0d4 [2023-11-23 22:32:15,493 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/data/39cb91373/35911ee6c5f143989191f83cfe812dfe [2023-11-23 22:32:15,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 22:32:15,497 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 22:32:15,499 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:15,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 22:32:15,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 22:32:15,506 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:15,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36c5489d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15, skipping insertion in model container [2023-11-23 22:32:15,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:15,564 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 22:32:15,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:15,883 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 22:32:15,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 22:32:15,965 INFO L206 MainTranslator]: Completed translation [2023-11-23 22:32:15,965 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15 WrapperNode [2023-11-23 22:32:15,966 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 22:32:15,967 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:15,967 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 22:32:15,967 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 22:32:15,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:15,992 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,021 INFO L138 Inliner]: procedures = 119, calls = 52, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 227 [2023-11-23 22:32:16,022 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 22:32:16,023 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 22:32:16,023 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 22:32:16,023 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 22:32:16,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,049 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,060 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,064 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 22:32:16,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 22:32:16,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 22:32:16,066 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 22:32:16,067 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (1/1) ... [2023-11-23 22:32:16,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 22:32:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:16,116 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 22:32:16,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 22:32:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-11-23 22:32:16,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-11-23 22:32:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 22:32:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 22:32:16,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 22:32:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 22:32:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 22:32:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 22:32:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 22:32:16,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 22:32:16,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 22:32:16,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 22:32:16,280 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 22:32:16,282 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 22:32:16,927 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 22:32:17,010 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 22:32:17,010 INFO L309 CfgBuilder]: Removed 31 assume(true) statements. [2023-11-23 22:32:17,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:17 BoogieIcfgContainer [2023-11-23 22:32:17,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 22:32:17,014 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 22:32:17,014 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 22:32:17,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 22:32:17,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:32:15" (1/3) ... [2023-11-23 22:32:17,021 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abb7f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:17, skipping insertion in model container [2023-11-23 22:32:17,022 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:32:15" (2/3) ... [2023-11-23 22:32:17,024 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abb7f61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:32:17, skipping insertion in model container [2023-11-23 22:32:17,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:32:17" (3/3) ... [2023-11-23 22:32:17,026 INFO L112 eAbstractionObserver]: Analyzing ICFG dll-queue-1.i [2023-11-23 22:32:17,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 22:32:17,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 63 error locations. [2023-11-23 22:32:17,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 22:32:17,136 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;@63cd92cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 22:32:17,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 63 error locations. [2023-11-23 22:32:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand has 173 states, 94 states have (on average 2.276595744680851) internal successors, (214), 157 states have internal predecessors, (214), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-11-23 22:32:17,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 22:32:17,151 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:17,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 22:32:17,155 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:17,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:17,164 INFO L85 PathProgramCache]: Analyzing trace with hash 15978, now seen corresponding path program 1 times [2023-11-23 22:32:17,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:17,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147060698] [2023-11-23 22:32:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:17,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:17,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:17,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:17,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147060698] [2023-11-23 22:32:17,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147060698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:17,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:17,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:17,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135737756] [2023-11-23 22:32:17,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:17,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:17,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:17,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:17,423 INFO L87 Difference]: Start difference. First operand has 173 states, 94 states have (on average 2.276595744680851) internal successors, (214), 157 states have internal predecessors, (214), 14 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 22:32:17,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:17,650 INFO L93 Difference]: Finished difference Result 152 states and 176 transitions. [2023-11-23 22:32:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-23 22:32:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:17,662 INFO L225 Difference]: With dead ends: 152 [2023-11-23 22:32:17,662 INFO L226 Difference]: Without dead ends: 151 [2023-11-23 22:32:17,664 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 [2023-11-23 22:32:17,668 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:17,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 102 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:32:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-23 22:32:17,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 147. [2023-11-23 22:32:17,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 81 states have (on average 1.9506172839506173) internal successors, (158), 145 states have internal predecessors, (158), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:17,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 172 transitions. [2023-11-23 22:32:17,719 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 172 transitions. Word has length 2 [2023-11-23 22:32:17,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:17,719 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 172 transitions. [2023-11-23 22:32:17,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 22:32:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 172 transitions. [2023-11-23 22:32:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-23 22:32:17,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:17,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-23 22:32:17,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 22:32:17,721 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:17,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash 15979, now seen corresponding path program 1 times [2023-11-23 22:32:17,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:17,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139385587] [2023-11-23 22:32:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:17,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:17,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:17,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:17,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139385587] [2023-11-23 22:32:17,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139385587] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:17,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:17,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 22:32:17,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101552489] [2023-11-23 22:32:17,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:17,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:17,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:17,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:17,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:17,834 INFO L87 Difference]: Start difference. First operand 147 states and 172 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 22:32:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:18,003 INFO L93 Difference]: Finished difference Result 139 states and 162 transitions. [2023-11-23 22:32:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2023-11-23 22:32:18,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:18,011 INFO L225 Difference]: With dead ends: 139 [2023-11-23 22:32:18,011 INFO L226 Difference]: Without dead ends: 139 [2023-11-23 22:32:18,017 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 [2023-11-23 22:32:18,020 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 130 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:18,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 107 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:18,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-23 22:32:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2023-11-23 22:32:18,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 81 states have (on average 1.8024691358024691) internal successors, (146), 134 states have internal predecessors, (146), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 160 transitions. [2023-11-23 22:32:18,047 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 160 transitions. Word has length 2 [2023-11-23 22:32:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:18,048 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 160 transitions. [2023-11-23 22:32:18,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2023-11-23 22:32:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 160 transitions. [2023-11-23 22:32:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 22:32:18,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:18,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:18,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 22:32:18,049 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:18,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:18,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2125466043, now seen corresponding path program 1 times [2023-11-23 22:32:18,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:18,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582268417] [2023-11-23 22:32:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:18,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582268417] [2023-11-23 22:32:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582268417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:18,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:18,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810006762] [2023-11-23 22:32:18,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:18,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:18,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:18,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:18,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:18,360 INFO L87 Difference]: Start difference. First operand 136 states and 160 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:18,551 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2023-11-23 22:32:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 22:32:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:18,553 INFO L225 Difference]: With dead ends: 143 [2023-11-23 22:32:18,553 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 22:32:18,554 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 [2023-11-23 22:32:18,563 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 225 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:18,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 110 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:32:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 22:32:18,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2023-11-23 22:32:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 1.7241379310344827) internal successors, (150), 134 states have internal predecessors, (150), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:18,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2023-11-23 22:32:18,582 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 7 [2023-11-23 22:32:18,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:18,582 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2023-11-23 22:32:18,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:18,582 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2023-11-23 22:32:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 22:32:18,587 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:18,587 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:18,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 22:32:18,588 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:18,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:18,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2125466042, now seen corresponding path program 1 times [2023-11-23 22:32:18,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:18,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941872555] [2023-11-23 22:32:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:18,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:18,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:18,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941872555] [2023-11-23 22:32:18,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941872555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:18,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:18,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:18,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507816334] [2023-11-23 22:32:18,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:18,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:32:18,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:32:18,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:32:18,857 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-23 22:32:19,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:19,265 INFO L93 Difference]: Finished difference Result 217 states and 257 transitions. [2023-11-23 22:32:19,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:32:19,266 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 22:32:19,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:19,268 INFO L225 Difference]: With dead ends: 217 [2023-11-23 22:32:19,268 INFO L226 Difference]: Without dead ends: 217 [2023-11-23 22:32:19,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:32:19,276 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 279 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:19,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 200 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 22:32:19,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-23 22:32:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 142. [2023-11-23 22:32:19,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 93 states have (on average 1.6989247311827957) internal successors, (158), 140 states have internal predecessors, (158), 14 states have call successors, (14), 1 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 172 transitions. [2023-11-23 22:32:19,295 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 172 transitions. Word has length 7 [2023-11-23 22:32:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 172 transitions. [2023-11-23 22:32:19,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 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) [2023-11-23 22:32:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 172 transitions. [2023-11-23 22:32:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 22:32:19,296 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:19,296 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:19,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 22:32:19,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:19,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 945106439, now seen corresponding path program 1 times [2023-11-23 22:32:19,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:19,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721888101] [2023-11-23 22:32:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:19,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:19,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721888101] [2023-11-23 22:32:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721888101] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:19,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:19,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 22:32:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456417958] [2023-11-23 22:32:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:19,369 INFO L87 Difference]: Start difference. First operand 142 states and 172 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:19,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:19,430 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2023-11-23 22:32:19,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:19,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 22:32:19,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:19,432 INFO L225 Difference]: With dead ends: 137 [2023-11-23 22:32:19,432 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 22:32:19,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:19,433 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 112 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:19,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 133 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 22:32:19,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-23 22:32:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 93 states have (on average 1.6344086021505377) internal successors, (152), 135 states have internal predecessors, (152), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 161 transitions. [2023-11-23 22:32:19,462 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 161 transitions. Word has length 10 [2023-11-23 22:32:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:19,463 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 161 transitions. [2023-11-23 22:32:19,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 161 transitions. [2023-11-23 22:32:19,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:32:19,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:19,464 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:19,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 22:32:19,465 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:19,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:19,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1831998218, now seen corresponding path program 1 times [2023-11-23 22:32:19,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:19,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906732029] [2023-11-23 22:32:19,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:19,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:19,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:19,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906732029] [2023-11-23 22:32:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906732029] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:19,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:19,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178767770] [2023-11-23 22:32:19,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:19,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:19,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:19,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:19,641 INFO L87 Difference]: Start difference. First operand 137 states and 161 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2023-11-23 22:32:19,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:19,782 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2023-11-23 22:32:19,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:19,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 9 [2023-11-23 22:32:19,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:19,785 INFO L225 Difference]: With dead ends: 136 [2023-11-23 22:32:19,785 INFO L226 Difference]: Without dead ends: 136 [2023-11-23 22:32:19,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:32:19,786 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 6 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:19,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 384 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:19,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-23 22:32:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-23 22:32:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 93 states have (on average 1.6129032258064515) internal successors, (150), 134 states have internal predecessors, (150), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2023-11-23 22:32:19,793 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 9 [2023-11-23 22:32:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:19,794 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2023-11-23 22:32:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2023-11-23 22:32:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2023-11-23 22:32:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 22:32:19,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:19,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:19,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 22:32:19,795 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:19,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1831998219, now seen corresponding path program 1 times [2023-11-23 22:32:19,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:19,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410681551] [2023-11-23 22:32:19,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:19,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:20,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:20,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:20,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410681551] [2023-11-23 22:32:20,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410681551] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:20,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:20,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 22:32:20,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524351093] [2023-11-23 22:32:20,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:20,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:20,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:20,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:20,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:20,009 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2023-11-23 22:32:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:20,166 INFO L93 Difference]: Finished difference Result 135 states and 157 transitions. [2023-11-23 22:32:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:20,167 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 9 [2023-11-23 22:32:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:20,168 INFO L225 Difference]: With dead ends: 135 [2023-11-23 22:32:20,168 INFO L226 Difference]: Without dead ends: 135 [2023-11-23 22:32:20,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:32:20,170 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 3 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:20,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 384 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-23 22:32:20,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-23 22:32:20,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 93 states have (on average 1.5913978494623655) internal successors, (148), 133 states have internal predecessors, (148), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 157 transitions. [2023-11-23 22:32:20,176 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 157 transitions. Word has length 9 [2023-11-23 22:32:20,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:20,177 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 157 transitions. [2023-11-23 22:32:20,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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) [2023-11-23 22:32:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 157 transitions. [2023-11-23 22:32:20,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 22:32:20,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:20,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:20,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 22:32:20,179 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:20,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:20,180 INFO L85 PathProgramCache]: Analyzing trace with hash -385860111, now seen corresponding path program 1 times [2023-11-23 22:32:20,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:20,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738461467] [2023-11-23 22:32:20,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:20,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:20,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:20,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738461467] [2023-11-23 22:32:20,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738461467] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:20,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:20,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 22:32:20,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618509470] [2023-11-23 22:32:20,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:20,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-23 22:32:20,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:20,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-23 22:32:20,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:32:20,503 INFO L87 Difference]: Start difference. First operand 135 states and 157 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-11-23 22:32:20,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:20,798 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2023-11-23 22:32:20,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:32:20,798 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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 11 [2023-11-23 22:32:20,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:20,800 INFO L225 Difference]: With dead ends: 137 [2023-11-23 22:32:20,800 INFO L226 Difference]: Without dead ends: 137 [2023-11-23 22:32:20,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:32:20,801 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 214 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:20,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 306 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:32:20,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-23 22:32:20,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2023-11-23 22:32:20,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 93 states have (on average 1.5806451612903225) internal successors, (147), 132 states have internal predecessors, (147), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-11-23 22:32:20,806 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 11 [2023-11-23 22:32:20,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:20,807 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-11-23 22:32:20,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 states have internal predecessors, (11), 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) [2023-11-23 22:32:20,807 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-11-23 22:32:20,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 22:32:20,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:20,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:20,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 22:32:20,809 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:20,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:20,809 INFO L85 PathProgramCache]: Analyzing trace with hash -385860110, now seen corresponding path program 1 times [2023-11-23 22:32:20,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:20,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985854603] [2023-11-23 22:32:20,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:20,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:21,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:21,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985854603] [2023-11-23 22:32:21,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985854603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:21,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:21,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-23 22:32:21,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940646461] [2023-11-23 22:32:21,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:21,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:32:21,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:32:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:32:21,201 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-23 22:32:21,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:21,864 INFO L93 Difference]: Finished difference Result 191 states and 221 transitions. [2023-11-23 22:32:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 22:32:21,865 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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 11 [2023-11-23 22:32:21,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:21,866 INFO L225 Difference]: With dead ends: 191 [2023-11-23 22:32:21,866 INFO L226 Difference]: Without dead ends: 191 [2023-11-23 22:32:21,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-23 22:32:21,867 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 277 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:21,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 515 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 22:32:21,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-23 22:32:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 121. [2023-11-23 22:32:21,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 87 states have (on average 1.528735632183908) internal successors, (133), 119 states have internal predecessors, (133), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2023-11-23 22:32:21,880 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 142 transitions. Word has length 11 [2023-11-23 22:32:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:21,880 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 142 transitions. [2023-11-23 22:32:21,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2023-11-23 22:32:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 142 transitions. [2023-11-23 22:32:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 22:32:21,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:21,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:21,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 22:32:21,883 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:21,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:21,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1590650999, now seen corresponding path program 1 times [2023-11-23 22:32:21,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:21,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452447280] [2023-11-23 22:32:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:21,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:21,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:21,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452447280] [2023-11-23 22:32:21,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452447280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:21,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:21,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:21,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677714899] [2023-11-23 22:32:21,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:21,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:21,929 INFO L87 Difference]: Start difference. First operand 121 states and 142 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:21,986 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2023-11-23 22:32:21,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:21,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-23 22:32:21,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:21,988 INFO L225 Difference]: With dead ends: 170 [2023-11-23 22:32:21,988 INFO L226 Difference]: Without dead ends: 170 [2023-11-23 22:32:21,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:21,989 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 41 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:21,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 220 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:32:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-23 22:32:21,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 134. [2023-11-23 22:32:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 100 states have (on average 1.47) internal successors, (147), 132 states have internal predecessors, (147), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:21,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-11-23 22:32:22,000 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 16 [2023-11-23 22:32:22,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:22,000 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-11-23 22:32:22,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-11-23 22:32:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 22:32:22,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:22,004 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:22,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 22:32:22,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:22,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash 271995679, now seen corresponding path program 1 times [2023-11-23 22:32:22,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:22,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325703951] [2023-11-23 22:32:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:22,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:22,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:22,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325703951] [2023-11-23 22:32:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325703951] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:22,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:22,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 22:32:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143906912] [2023-11-23 22:32:22,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:22,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:22,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:22,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:22,368 INFO L87 Difference]: Start difference. First operand 134 states and 156 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2023-11-23 22:32:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:22,521 INFO L93 Difference]: Finished difference Result 141 states and 163 transitions. [2023-11-23 22:32:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 22:32:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 18 [2023-11-23 22:32:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:22,523 INFO L225 Difference]: With dead ends: 141 [2023-11-23 22:32:22,523 INFO L226 Difference]: Without dead ends: 141 [2023-11-23 22:32:22,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 22:32:22,525 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 10 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:22,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 418 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:22,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-23 22:32:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2023-11-23 22:32:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 104 states have (on average 1.4519230769230769) internal successors, (151), 136 states have internal predecessors, (151), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 160 transitions. [2023-11-23 22:32:22,536 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 160 transitions. Word has length 18 [2023-11-23 22:32:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:22,536 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 160 transitions. [2023-11-23 22:32:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2023-11-23 22:32:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 160 transitions. [2023-11-23 22:32:22,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 22:32:22,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:22,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:22,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 22:32:22,539 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:22,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash 275840090, now seen corresponding path program 1 times [2023-11-23 22:32:22,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:22,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760343145] [2023-11-23 22:32:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:22,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:22,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:22,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:22,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760343145] [2023-11-23 22:32:22,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760343145] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:22,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-23 22:32:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478129762] [2023-11-23 22:32:22,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:32:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:32:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:32:22,800 INFO L87 Difference]: Start difference. First operand 138 states and 160 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:23,172 INFO L93 Difference]: Finished difference Result 210 states and 243 transitions. [2023-11-23 22:32:23,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:32:23,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 22:32:23,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:23,175 INFO L225 Difference]: With dead ends: 210 [2023-11-23 22:32:23,175 INFO L226 Difference]: Without dead ends: 210 [2023-11-23 22:32:23,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-23 22:32:23,176 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 272 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:23,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 470 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:32:23,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-23 22:32:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 142. [2023-11-23 22:32:23,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 108 states have (on average 1.4351851851851851) internal successors, (155), 140 states have internal predecessors, (155), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2023-11-23 22:32:23,182 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 19 [2023-11-23 22:32:23,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:23,182 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2023-11-23 22:32:23,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,183 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2023-11-23 22:32:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 22:32:23,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:23,187 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:23,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 22:32:23,188 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:23,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:23,189 INFO L85 PathProgramCache]: Analyzing trace with hash -101384236, now seen corresponding path program 1 times [2023-11-23 22:32:23,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:23,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003036057] [2023-11-23 22:32:23,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:23,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:23,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:23,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003036057] [2023-11-23 22:32:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003036057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:23,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:23,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666240646] [2023-11-23 22:32:23,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 22:32:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:23,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 22:32:23,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:23,267 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-11-23 22:32:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:23,405 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2023-11-23 22:32:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 22:32:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:23,407 INFO L225 Difference]: With dead ends: 142 [2023-11-23 22:32:23,407 INFO L226 Difference]: Without dead ends: 142 [2023-11-23 22:32:23,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:23,409 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 110 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:23,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 262 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:23,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-23 22:32:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-23 22:32:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 140 states have internal predecessors, (154), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 163 transitions. [2023-11-23 22:32:23,415 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 163 transitions. Word has length 19 [2023-11-23 22:32:23,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:23,417 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 163 transitions. [2023-11-23 22:32:23,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2023-11-23 22:32:23,417 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 163 transitions. [2023-11-23 22:32:23,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 22:32:23,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:23,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:23,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 22:32:23,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:23,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:23,419 INFO L85 PathProgramCache]: Analyzing trace with hash -975301181, now seen corresponding path program 1 times [2023-11-23 22:32:23,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:23,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527713013] [2023-11-23 22:32:23,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:23,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:23,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527713013] [2023-11-23 22:32:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527713013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:23,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700528486] [2023-11-23 22:32:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:23,545 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:23,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 22:32:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:23,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:32:23,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:23,724 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 [2023-11-23 22:32:23,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 22:32:23,800 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:23,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2023-11-23 22:32:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:24,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-23 22:32:24,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700528486] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:24,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:24,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 12 [2023-11-23 22:32:24,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055415327] [2023-11-23 22:32:24,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:24,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:32:24,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:24,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:32:24,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:32:24,128 INFO L87 Difference]: Start difference. First operand 142 states and 163 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) [2023-11-23 22:32:24,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:24,458 INFO L93 Difference]: Finished difference Result 170 states and 197 transitions. [2023-11-23 22:32:24,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 22:32:24,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) Word has length 22 [2023-11-23 22:32:24,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:24,460 INFO L225 Difference]: With dead ends: 170 [2023-11-23 22:32:24,460 INFO L226 Difference]: Without dead ends: 170 [2023-11-23 22:32:24,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:32:24,461 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 55 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:24,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 711 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:32:24,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-23 22:32:24,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 151. [2023-11-23 22:32:24,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 117 states have (on average 1.4017094017094016) internal successors, (164), 149 states have internal predecessors, (164), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:24,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 173 transitions. [2023-11-23 22:32:24,475 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 173 transitions. Word has length 22 [2023-11-23 22:32:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:24,476 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 173 transitions. [2023-11-23 22:32:24,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 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) [2023-11-23 22:32:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 173 transitions. [2023-11-23 22:32:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 22:32:24,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:24,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:24,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:24,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-23 22:32:24,697 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:24,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash -169566645, now seen corresponding path program 1 times [2023-11-23 22:32:24,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:24,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828746768] [2023-11-23 22:32:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:24,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828746768] [2023-11-23 22:32:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828746768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:24,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865926500] [2023-11-23 22:32:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:24,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:24,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:24,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 22:32:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:24,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 22:32:24,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:24,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-23 22:32:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:24,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865926500] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:24,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:24,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-23 22:32:24,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394902970] [2023-11-23 22:32:24,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 22:32:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 22:32:24,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-23 22:32:24,999 INFO L87 Difference]: Start difference. First operand 151 states and 173 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-11-23 22:32:25,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:25,205 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2023-11-23 22:32:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 22:32:25,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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 23 [2023-11-23 22:32:25,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:25,206 INFO L225 Difference]: With dead ends: 160 [2023-11-23 22:32:25,206 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 22:32:25,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-23 22:32:25,207 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 10 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:25,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 437 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:32:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 22:32:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-23 22:32:25,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 109 states have (on average 1.4220183486238531) internal successors, (155), 141 states have internal predecessors, (155), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2023-11-23 22:32:25,211 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 23 [2023-11-23 22:32:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:25,212 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2023-11-23 22:32:25,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 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) [2023-11-23 22:32:25,212 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2023-11-23 22:32:25,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 22:32:25,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:25,213 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:25,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-23 22:32:25,413 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:25,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:25,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1408130527, now seen corresponding path program 1 times [2023-11-23 22:32:25,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:25,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600392262] [2023-11-23 22:32:25,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:25,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:25,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600392262] [2023-11-23 22:32:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600392262] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780133082] [2023-11-23 22:32:25,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:25,889 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:25,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 22:32:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:26,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:32:26,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:26,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:26,062 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:26,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:26,103 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 1 [2023-11-23 22:32:26,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:26,193 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:26,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-23 22:32:26,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:26,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 22:32:26,259 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:26,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 22:32:26,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:32:26,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2023-11-23 22:32:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:26,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:26,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:26,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-11-23 22:32:26,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:26,910 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 245 treesize of output 220 [2023-11-23 22:32:26,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 136 [2023-11-23 22:32:26,937 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:26,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 135 [2023-11-23 22:32:27,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:27,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-23 22:32:27,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2023-11-23 22:32:27,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 22:32:27,111 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:27,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 40 [2023-11-23 22:32:27,116 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:27,129 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2023-11-23 22:32:27,130 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 88 treesize of output 67 [2023-11-23 22:32:27,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-23 22:32:27,157 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:27,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-23 22:32:27,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:27,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 22:32:27,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:27,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780133082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:27,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:27,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 25 [2023-11-23 22:32:27,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173221121] [2023-11-23 22:32:27,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:27,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:32:27,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:27,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:32:27,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=494, Unknown=26, NotChecked=0, Total=600 [2023-11-23 22:32:27,361 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:28,014 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (and (not (= .cse0 |c_ULTIMATE.start_main_~head~0#1.base|)) (not (= .cse0 0)) (or (and (= |c_ULTIMATE.start_main_~item~0#1.offset| 0) (= |c_ULTIMATE.start_main_~item~0#1.base| 0)) (forall ((v_ArrVal_486 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_486) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0)))) (= (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|) 1))) is different from false [2023-11-23 22:32:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:29,927 INFO L93 Difference]: Finished difference Result 305 states and 355 transitions. [2023-11-23 22:32:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-23 22:32:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-23 22:32:29,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:29,931 INFO L225 Difference]: With dead ends: 305 [2023-11-23 22:32:29,931 INFO L226 Difference]: Without dead ends: 305 [2023-11-23 22:32:29,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=1030, Unknown=30, NotChecked=68, Total=1332 [2023-11-23 22:32:29,932 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 781 mSDsluCounter, 1832 mSDsCounter, 0 mSdLazyCounter, 1733 mSolverCounterSat, 27 mSolverCounterUnsat, 43 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1733 IncrementalHoareTripleChecker+Invalid, 43 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:29,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1983 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1733 Invalid, 43 Unknown, 24 Unchecked, 2.1s Time] [2023-11-23 22:32:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-23 22:32:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 153. [2023-11-23 22:32:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 119 states have (on average 1.403361344537815) internal successors, (167), 151 states have internal predecessors, (167), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 176 transitions. [2023-11-23 22:32:29,940 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 176 transitions. Word has length 29 [2023-11-23 22:32:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:29,940 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 176 transitions. [2023-11-23 22:32:29,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 176 transitions. [2023-11-23 22:32:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 22:32:29,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:29,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:29,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:30,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-23 22:32:30,156 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:30,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:30,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1521654695, now seen corresponding path program 1 times [2023-11-23 22:32:30,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:30,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181352509] [2023-11-23 22:32:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:30,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:30,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:30,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:30,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181352509] [2023-11-23 22:32:30,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181352509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:30,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:30,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:30,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161951975] [2023-11-23 22:32:30,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:30,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:30,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:30,225 INFO L87 Difference]: Start difference. First operand 153 states and 176 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:30,290 INFO L93 Difference]: Finished difference Result 218 states and 249 transitions. [2023-11-23 22:32:30,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-11-23 22:32:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:30,292 INFO L225 Difference]: With dead ends: 218 [2023-11-23 22:32:30,293 INFO L226 Difference]: Without dead ends: 218 [2023-11-23 22:32:30,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:30,294 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 49 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:30,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 220 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:30,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-23 22:32:30,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 171. [2023-11-23 22:32:30,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 137 states have (on average 1.3576642335766422) internal successors, (186), 169 states have internal predecessors, (186), 9 states have call successors, (9), 1 states have call predecessors, (9), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:30,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 195 transitions. [2023-11-23 22:32:30,301 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 195 transitions. Word has length 30 [2023-11-23 22:32:30,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:30,301 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 195 transitions. [2023-11-23 22:32:30,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 195 transitions. [2023-11-23 22:32:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 22:32:30,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:30,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:30,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 22:32:30,304 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:30,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash 706251702, now seen corresponding path program 1 times [2023-11-23 22:32:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:30,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446397044] [2023-11-23 22:32:30,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:30,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:30,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446397044] [2023-11-23 22:32:30,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446397044] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:30,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111133731] [2023-11-23 22:32:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:30,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:30,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:30,572 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:30,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 22:32:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:30,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 22:32:30,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:30,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 22:32:30,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 22:32:30,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 22:32:30,802 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:30,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:30,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:30,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111133731] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:30,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:30,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 11 [2023-11-23 22:32:30,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026950465] [2023-11-23 22:32:30,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:30,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 22:32:30,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:30,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 22:32:30,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-11-23 22:32:30,949 INFO L87 Difference]: Start difference. First operand 171 states and 195 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:31,250 INFO L93 Difference]: Finished difference Result 220 states and 247 transitions. [2023-11-23 22:32:31,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 22:32:31,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-23 22:32:31,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:31,252 INFO L225 Difference]: With dead ends: 220 [2023-11-23 22:32:31,252 INFO L226 Difference]: Without dead ends: 220 [2023-11-23 22:32:31,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-11-23 22:32:31,253 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 562 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:31,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [562 Valid, 301 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 22:32:31,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-23 22:32:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 170. [2023-11-23 22:32:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 137 states have (on average 1.3430656934306568) internal successors, (184), 168 states have internal predecessors, (184), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-11-23 22:32:31,271 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 33 [2023-11-23 22:32:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:31,271 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-11-23 22:32:31,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-11-23 22:32:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 22:32:31,272 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:31,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:31,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:31,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-23 22:32:31,494 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:31,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash 232211828, now seen corresponding path program 1 times [2023-11-23 22:32:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:31,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944565360] [2023-11-23 22:32:31,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:31,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:31,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:31,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944565360] [2023-11-23 22:32:31,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944565360] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:31,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104246900] [2023-11-23 22:32:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:31,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:31,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:31,966 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:31,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 22:32:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:32,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 22:32:32,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:32,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:32,168 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-23 22:32:32,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-23 22:32:32,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:32,288 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:32,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:32,347 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:32,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 22:32:32,378 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:32,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:32,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 22:32:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:32,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:32,652 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_777 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_777) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2023-11-23 22:32:32,661 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_777 (Array Int Int)) (v_ArrVal_775 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_775))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_777)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2023-11-23 22:32:32,668 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_777 (Array Int Int)) (v_ArrVal_775 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_775))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_777)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2023-11-23 22:32:32,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:32,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-11-23 22:32:32,689 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:32,690 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 144 treesize of output 131 [2023-11-23 22:32:32,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:32,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2023-11-23 22:32:32,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-11-23 22:32:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104246900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:34,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:34,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 25 [2023-11-23 22:32:34,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139817017] [2023-11-23 22:32:34,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:34,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 22:32:34,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 22:32:34,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=386, Unknown=9, NotChecked=132, Total=650 [2023-11-23 22:32:34,195 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 26 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-11-23 22:32:35,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:35,436 INFO L93 Difference]: Finished difference Result 298 states and 341 transitions. [2023-11-23 22:32:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 22:32:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-23 22:32:35,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:35,439 INFO L225 Difference]: With dead ends: 298 [2023-11-23 22:32:35,439 INFO L226 Difference]: Without dead ends: 298 [2023-11-23 22:32:35,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=745, Unknown=11, NotChecked=186, Total=1190 [2023-11-23 22:32:35,440 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 521 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 879 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:35,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [521 Valid, 702 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 799 Invalid, 0 Unknown, 879 Unchecked, 1.0s Time] [2023-11-23 22:32:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-11-23 22:32:35,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 180. [2023-11-23 22:32:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 147 states have (on average 1.346938775510204) internal successors, (198), 178 states have internal predecessors, (198), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 206 transitions. [2023-11-23 22:32:35,448 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 206 transitions. Word has length 36 [2023-11-23 22:32:35,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:35,448 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 206 transitions. [2023-11-23 22:32:35,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.16) internal successors, (104), 26 states have internal predecessors, (104), 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) [2023-11-23 22:32:35,449 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 206 transitions. [2023-11-23 22:32:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 22:32:35,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:35,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:35,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:35,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:35,663 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:35,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 232211829, now seen corresponding path program 1 times [2023-11-23 22:32:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:35,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060080467] [2023-11-23 22:32:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:35,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:36,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060080467] [2023-11-23 22:32:36,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060080467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:36,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040110050] [2023-11-23 22:32:36,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:36,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:36,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:36,341 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:36,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 22:32:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:36,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-23 22:32:36,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:36,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:36,536 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:36,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:36,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:32:36,581 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 [2023-11-23 22:32:36,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:36,685 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:36,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-23 22:32:36,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:36,750 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:36,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 22:32:36,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:36,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:32:36,789 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:36,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-23 22:32:36,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:36,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 22:32:36,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-23 22:32:36,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:36,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:37,151 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_879 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (<= (+ 12 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_879) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_880 (Array Int Int))) (<= 0 (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-23 22:32:37,180 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_879 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_879) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_880 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8))))) is different from false [2023-11-23 22:32:37,196 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_875 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (<= 0 (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_875) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_876) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_875 (Array Int Int)) (v_ArrVal_879 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_876))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ 12 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_875) .cse0 v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_879) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) is different from false [2023-11-23 22:32:37,211 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_875 (Array Int Int)) (v_ArrVal_879 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_876))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_875) .cse1 v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 12) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_879) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_876 (Array Int Int)) (v_ArrVal_875 (Array Int Int)) (v_ArrVal_880 (Array Int Int))) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_875) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_876) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_880) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 8))))) is different from false [2023-11-23 22:32:37,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2023-11-23 22:32:37,232 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2023-11-23 22:32:37,247 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,248 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 632 treesize of output 567 [2023-11-23 22:32:37,301 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,305 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 1127 treesize of output 1070 [2023-11-23 22:32:37,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 547 treesize of output 523 [2023-11-23 22:32:37,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 523 treesize of output 499 [2023-11-23 22:32:37,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 499 treesize of output 491 [2023-11-23 22:32:37,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 491 treesize of output 447 [2023-11-23 22:32:37,782 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-11-23 22:32:37,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:37,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-23 22:32:37,797 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:37,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 28 treesize of output 20 [2023-11-23 22:32:37,803 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:37,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-23 22:32:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:37,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040110050] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:37,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:37,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 9] total 26 [2023-11-23 22:32:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361200805] [2023-11-23 22:32:37,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-23 22:32:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-23 22:32:37,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=439, Unknown=4, NotChecked=180, Total=702 [2023-11-23 22:32:37,932 INFO L87 Difference]: Start difference. First operand 180 states and 206 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 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) [2023-11-23 22:32:39,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:39,554 INFO L93 Difference]: Finished difference Result 287 states and 328 transitions. [2023-11-23 22:32:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:32:39,555 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-11-23 22:32:39,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:39,557 INFO L225 Difference]: With dead ends: 287 [2023-11-23 22:32:39,557 INFO L226 Difference]: Without dead ends: 287 [2023-11-23 22:32:39,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=267, Invalid=1151, Unknown=4, NotChecked=300, Total=1722 [2023-11-23 22:32:39,559 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 776 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 2075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1104 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:39,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 738 Invalid, 2075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 908 Invalid, 0 Unknown, 1104 Unchecked, 0.9s Time] [2023-11-23 22:32:39,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-23 22:32:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 183. [2023-11-23 22:32:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 150 states have (on average 1.34) internal successors, (201), 181 states have internal predecessors, (201), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 209 transitions. [2023-11-23 22:32:39,566 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 209 transitions. Word has length 36 [2023-11-23 22:32:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:39,567 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 209 transitions. [2023-11-23 22:32:39,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 27 states have internal predecessors, (105), 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) [2023-11-23 22:32:39,567 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 209 transitions. [2023-11-23 22:32:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 22:32:39,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:39,568 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:39,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:39,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:39,783 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:39,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:39,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1370959522, now seen corresponding path program 1 times [2023-11-23 22:32:39,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:39,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507607416] [2023-11-23 22:32:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:39,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:39,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:39,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507607416] [2023-11-23 22:32:39,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507607416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:39,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:39,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:39,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735316964] [2023-11-23 22:32:39,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:39,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:39,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:39,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:39,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:39,829 INFO L87 Difference]: Start difference. First operand 183 states and 209 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:39,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:39,859 INFO L93 Difference]: Finished difference Result 184 states and 209 transitions. [2023-11-23 22:32:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:39,859 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-23 22:32:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:39,861 INFO L225 Difference]: With dead ends: 184 [2023-11-23 22:32:39,861 INFO L226 Difference]: Without dead ends: 184 [2023-11-23 22:32:39,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:39,862 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:39,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 228 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 22:32:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-11-23 22:32:39,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2023-11-23 22:32:39,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.3311258278145695) internal successors, (201), 182 states have internal predecessors, (201), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:39,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2023-11-23 22:32:39,868 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 39 [2023-11-23 22:32:39,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:39,869 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2023-11-23 22:32:39,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:39,869 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2023-11-23 22:32:39,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 22:32:39,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:39,870 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-23 22:32:39,871 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:39,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash 579373491, now seen corresponding path program 1 times [2023-11-23 22:32:39,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:39,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222269786] [2023-11-23 22:32:39,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:39,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:40,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:40,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222269786] [2023-11-23 22:32:40,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222269786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:40,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44398612] [2023-11-23 22:32:40,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:40,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:40,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:40,834 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:40,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 22:32:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:40,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 22:32:40,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:40,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:41,040 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:41,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:41,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:41,079 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 [2023-11-23 22:32:41,168 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:41,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-23 22:32:41,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:41,231 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:41,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 22:32:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:41,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:32:41,268 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:41,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2023-11-23 22:32:41,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-23 22:32:41,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:41,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-11-23 22:32:41,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-23 22:32:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:41,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:41,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 49 [2023-11-23 22:32:41,544 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1028 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1028) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~item~0#1.base|)) (forall ((v_ArrVal_1026 (Array Int Int))) (= |c_ULTIMATE.start_main_~item~0#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1026) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2023-11-23 22:32:41,650 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1028 (Array Int Int)) (v_ArrVal_1023 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1023))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_1028) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) .cse1)))) (forall ((v_ArrVal_1026 (Array Int Int)) (v_ArrVal_1023 (Array Int Int)) (v_ArrVal_1022 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1022))) (= (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) (select (select (store .cse2 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1023) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1026) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-23 22:32:41,663 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1028 (Array Int Int)) (v_ArrVal_1023 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1023))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_1028) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_1026 (Array Int Int)) (v_ArrVal_1023 (Array Int Int)) (v_ArrVal_1022 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_1022))) (= (select (select .cse3 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) (select (select (store .cse3 (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_1023) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1026) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2023-11-23 22:32:41,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:41,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 44 [2023-11-23 22:32:41,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:41,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-11-23 22:32:41,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 56 [2023-11-23 22:32:41,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:41,703 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 238 treesize of output 205 [2023-11-23 22:32:41,740 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:41,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 67 [2023-11-23 22:32:41,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2023-11-23 22:32:41,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 68 [2023-11-23 22:32:41,822 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-23 22:32:41,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 1 [2023-11-23 22:32:41,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:41,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44398612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:41,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:41,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 11] total 31 [2023-11-23 22:32:41,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997272446] [2023-11-23 22:32:41,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:41,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-23 22:32:41,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:41,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-23 22:32:41,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=716, Unknown=7, NotChecked=168, Total=992 [2023-11-23 22:32:41,939 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:43,245 INFO L93 Difference]: Finished difference Result 295 states and 336 transitions. [2023-11-23 22:32:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 22:32:43,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-23 22:32:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:43,254 INFO L225 Difference]: With dead ends: 295 [2023-11-23 22:32:43,254 INFO L226 Difference]: Without dead ends: 295 [2023-11-23 22:32:43,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=293, Invalid=1518, Unknown=7, NotChecked=252, Total=2070 [2023-11-23 22:32:43,256 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 810 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 802 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:43,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 912 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 887 Invalid, 0 Unknown, 802 Unchecked, 0.7s Time] [2023-11-23 22:32:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-23 22:32:43,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 183. [2023-11-23 22:32:43,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 181 states have internal predecessors, (199), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 207 transitions. [2023-11-23 22:32:43,263 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 207 transitions. Word has length 40 [2023-11-23 22:32:43,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:43,264 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 207 transitions. [2023-11-23 22:32:43,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.4375) internal successors, (110), 31 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:43,264 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 207 transitions. [2023-11-23 22:32:43,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 22:32:43,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:43,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:43,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:43,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:43,486 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:43,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:43,487 INFO L85 PathProgramCache]: Analyzing trace with hash 567998358, now seen corresponding path program 1 times [2023-11-23 22:32:43,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:43,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741730887] [2023-11-23 22:32:43,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:43,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:43,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:43,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741730887] [2023-11-23 22:32:43,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741730887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:43,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536051525] [2023-11-23 22:32:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:43,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:43,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:43,971 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:43,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 22:32:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:44,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:32:44,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:44,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:44,200 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-23 22:32:44,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-23 22:32:44,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:44,332 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:44,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:44,404 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:44,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 22:32:44,437 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:44,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:44,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 22:32:44,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 12 [2023-11-23 22:32:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:44,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:44,903 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1129 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1129) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) (forall ((v_ArrVal_1129 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~head~0#1.base| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1129) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2023-11-23 22:32:44,919 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1126 (Array Int Int))) (not (= |c_ULTIMATE.start_main_~head~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1126))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1126 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1126))) (store .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) is different from false [2023-11-23 22:32:44,930 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1126 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1126))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.base|))) (forall ((v_ArrVal_1129 (Array Int Int)) (v_ArrVal_1126 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1126))) (store .cse2 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1129)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)))) is different from false [2023-11-23 22:32:44,941 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:44,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-11-23 22:32:44,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:44,953 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 252 treesize of output 227 [2023-11-23 22:32:44,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 163 [2023-11-23 22:32:44,976 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:44,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2023-11-23 22:32:45,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:45,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 30 [2023-11-23 22:32:45,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:45,291 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 141 treesize of output 128 [2023-11-23 22:32:45,305 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:45,305 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 75 [2023-11-23 22:32:45,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2023-11-23 22:32:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:45,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536051525] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:45,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:45,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11] total 24 [2023-11-23 22:32:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276057660] [2023-11-23 22:32:45,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:32:45,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:45,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:32:45,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=355, Unknown=9, NotChecked=126, Total=600 [2023-11-23 22:32:45,467 INFO L87 Difference]: Start difference. First operand 183 states and 207 transitions. Second operand has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 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) [2023-11-23 22:32:46,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:46,059 INFO L93 Difference]: Finished difference Result 225 states and 254 transitions. [2023-11-23 22:32:46,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:32:46,060 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 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 [2023-11-23 22:32:46,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:46,061 INFO L225 Difference]: With dead ends: 225 [2023-11-23 22:32:46,061 INFO L226 Difference]: Without dead ends: 225 [2023-11-23 22:32:46,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=389, Unknown=9, NotChecked=132, Total=650 [2023-11-23 22:32:46,062 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 244 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 600 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:46,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 658 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 663 Invalid, 0 Unknown, 600 Unchecked, 0.5s Time] [2023-11-23 22:32:46,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-23 22:32:46,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 203. [2023-11-23 22:32:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 1.3529411764705883) internal successors, (230), 201 states have internal predecessors, (230), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:46,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 238 transitions. [2023-11-23 22:32:46,068 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 238 transitions. Word has length 40 [2023-11-23 22:32:46,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:46,068 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 238 transitions. [2023-11-23 22:32:46,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 25 states have internal predecessors, (88), 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) [2023-11-23 22:32:46,069 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 238 transitions. [2023-11-23 22:32:46,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 22:32:46,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:46,069 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:46,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:46,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-23 22:32:46,286 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:46,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash 567998359, now seen corresponding path program 1 times [2023-11-23 22:32:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:46,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489426413] [2023-11-23 22:32:46,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:46,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:46,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:46,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489426413] [2023-11-23 22:32:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489426413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:46,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829549725] [2023-11-23 22:32:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:46,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:46,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:46,819 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:46,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 22:32:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:46,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 22:32:46,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:46,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:47,029 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:47,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:47,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 22:32:47,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:47,070 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 [2023-11-23 22:32:47,166 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:47,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-23 22:32:47,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:47,231 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 22:32:47,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-23 22:32:47,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 22:32:47,250 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:47,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 22:32:47,302 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:47,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2023-11-23 22:32:47,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:47,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 22:32:47,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2023-11-23 22:32:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:47,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:47,688 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1234 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2023-11-23 22:32:47,770 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1230) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1231) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1231))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1230) .cse0 v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) is different from false [2023-11-23 22:32:47,784 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (and (forall ((v_ArrVal_1235 (Array Int Int)) (v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1231))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1230) .cse1 v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_1235) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_1234 (Array Int Int)) (v_ArrVal_1231 (Array Int Int)) (v_ArrVal_1230 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1230) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1231) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1234) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2023-11-23 22:32:47,795 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:47,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2023-11-23 22:32:47,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:47,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2023-11-23 22:32:47,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:47,816 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 334 treesize of output 301 [2023-11-23 22:32:47,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:47,872 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 474 treesize of output 457 [2023-11-23 22:32:47,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 180 treesize of output 172 [2023-11-23 22:32:47,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 164 [2023-11-23 22:32:47,909 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:47,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 154 [2023-11-23 22:32:47,918 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 70 [2023-11-23 22:32:48,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:48,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2023-11-23 22:32:48,106 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:48,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-11-23 22:32:48,111 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:48,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2023-11-23 22:32:48,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 22:32:48,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-23 22:32:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:48,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829549725] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:48,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:48,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 24 [2023-11-23 22:32:48,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98842528] [2023-11-23 22:32:48,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:48,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 22:32:48,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:48,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 22:32:48,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=387, Unknown=9, NotChecked=126, Total=600 [2023-11-23 22:32:48,233 INFO L87 Difference]: Start difference. First operand 203 states and 238 transitions. Second operand has 25 states, 24 states have (on average 4.875) internal successors, (117), 25 states have internal predecessors, (117), 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) [2023-11-23 22:32:49,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:49,264 INFO L93 Difference]: Finished difference Result 222 states and 251 transitions. [2023-11-23 22:32:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-23 22:32:49,264 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.875) internal successors, (117), 25 states have internal predecessors, (117), 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 [2023-11-23 22:32:49,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:49,266 INFO L225 Difference]: With dead ends: 222 [2023-11-23 22:32:49,266 INFO L226 Difference]: Without dead ends: 222 [2023-11-23 22:32:49,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=686, Unknown=9, NotChecked=174, Total=1056 [2023-11-23 22:32:49,267 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 589 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:49,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [589 Valid, 676 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 807 Invalid, 0 Unknown, 587 Unchecked, 0.7s Time] [2023-11-23 22:32:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-23 22:32:49,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 203. [2023-11-23 22:32:49,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 170 states have (on average 1.3470588235294119) internal successors, (229), 201 states have internal predecessors, (229), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:49,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 237 transitions. [2023-11-23 22:32:49,274 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 237 transitions. Word has length 40 [2023-11-23 22:32:49,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:49,274 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 237 transitions. [2023-11-23 22:32:49,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.875) internal successors, (117), 25 states have internal predecessors, (117), 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) [2023-11-23 22:32:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 237 transitions. [2023-11-23 22:32:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 22:32:49,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:49,276 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:49,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-23 22:32:49,495 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:49,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash 428078808, now seen corresponding path program 1 times [2023-11-23 22:32:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:49,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437167369] [2023-11-23 22:32:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:49,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:49,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437167369] [2023-11-23 22:32:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437167369] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90142799] [2023-11-23 22:32:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:49,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:49,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:49,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:49,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 22:32:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:49,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 22:32:49,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:49,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2023-11-23 22:32:49,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2023-11-23 22:32:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:49,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 22:32:49,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90142799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:49,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:49,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 9 [2023-11-23 22:32:49,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855730682] [2023-11-23 22:32:49,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:49,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 22:32:49,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 22:32:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-23 22:32:49,956 INFO L87 Difference]: Start difference. First operand 203 states and 237 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2023-11-23 22:32:50,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:50,320 INFO L93 Difference]: Finished difference Result 224 states and 260 transitions. [2023-11-23 22:32:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 22:32:50,320 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) Word has length 41 [2023-11-23 22:32:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:50,322 INFO L225 Difference]: With dead ends: 224 [2023-11-23 22:32:50,322 INFO L226 Difference]: Without dead ends: 224 [2023-11-23 22:32:50,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-23 22:32:50,323 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 170 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:50,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 503 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 22:32:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-11-23 22:32:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 207. [2023-11-23 22:32:50,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 174 states have (on average 1.3275862068965518) internal successors, (231), 205 states have internal predecessors, (231), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 239 transitions. [2023-11-23 22:32:50,330 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 239 transitions. Word has length 41 [2023-11-23 22:32:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:50,330 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 239 transitions. [2023-11-23 22:32:50,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 9 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) [2023-11-23 22:32:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 239 transitions. [2023-11-23 22:32:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 22:32:50,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:50,332 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:50,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:50,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-23 22:32:50,556 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:50,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:50,556 INFO L85 PathProgramCache]: Analyzing trace with hash 428081773, now seen corresponding path program 1 times [2023-11-23 22:32:50,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:50,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725680348] [2023-11-23 22:32:50,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:50,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:50,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725680348] [2023-11-23 22:32:50,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725680348] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154734939] [2023-11-23 22:32:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:50,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:50,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:50,908 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:50,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 22:32:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:51,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 22:32:51,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:51,092 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:51,121 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:51,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:51,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:51,143 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 [2023-11-23 22:32:51,216 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:51,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2023-11-23 22:32:51,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-23 22:32:51,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-23 22:32:51,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:32:51,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 22:32:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:51,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:51,456 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1430 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~item~0#1.base| v_ArrVal_1430) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (= .cse0 0) (< .cse0 0)))) is different from false [2023-11-23 22:32:51,481 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1430 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1430) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse0 0) (= .cse0 0)))) is different from false [2023-11-23 22:32:51,492 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1428 (Array Int Int)) (v_ArrVal_1427 (Array Int Int)) (v_ArrVal_1430 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1428) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1427) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1430) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse0 0) (= .cse0 0)))) is different from false [2023-11-23 22:32:51,504 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1428 (Array Int Int)) (v_ArrVal_1427 (Array Int Int)) (v_ArrVal_1430 (Array Int Int))) (let ((.cse0 (select (select (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|))) (store (store |c_#memory_$Pointer$.offset| .cse1 v_ArrVal_1428) (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_1427) |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1430)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse0 0) (= .cse0 0)))) is different from false [2023-11-23 22:32:51,513 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:51,514 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2023-11-23 22:32:51,522 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:51,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 49 [2023-11-23 22:32:51,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 79 [2023-11-23 22:32:51,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:51,539 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 343 treesize of output 326 [2023-11-23 22:32:51,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 117 [2023-11-23 22:32:51,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 167 treesize of output 155 [2023-11-23 22:32:51,571 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 101 [2023-11-23 22:32:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:51,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154734939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:51,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:51,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2023-11-23 22:32:51,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343512284] [2023-11-23 22:32:51,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-23 22:32:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-23 22:32:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=319, Unknown=4, NotChecked=156, Total=552 [2023-11-23 22:32:51,777 INFO L87 Difference]: Start difference. First operand 207 states and 239 transitions. Second operand has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-11-23 22:32:52,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:52,460 INFO L93 Difference]: Finished difference Result 222 states and 250 transitions. [2023-11-23 22:32:52,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 22:32:52,460 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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 41 [2023-11-23 22:32:52,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:52,461 INFO L225 Difference]: With dead ends: 222 [2023-11-23 22:32:52,462 INFO L226 Difference]: Without dead ends: 222 [2023-11-23 22:32:52,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=662, Unknown=4, NotChecked=236, Total=1122 [2023-11-23 22:32:52,463 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 474 mSDsluCounter, 723 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 804 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 768 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:52,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 804 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 615 Invalid, 0 Unknown, 768 Unchecked, 0.5s Time] [2023-11-23 22:32:52,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-11-23 22:32:52,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 208. [2023-11-23 22:32:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 175 states have (on average 1.3257142857142856) internal successors, (232), 206 states have internal predecessors, (232), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 240 transitions. [2023-11-23 22:32:52,469 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 240 transitions. Word has length 41 [2023-11-23 22:32:52,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:52,470 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 240 transitions. [2023-11-23 22:32:52,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 3.869565217391304) internal successors, (89), 24 states have internal predecessors, (89), 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) [2023-11-23 22:32:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 240 transitions. [2023-11-23 22:32:52,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 22:32:52,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:52,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:52,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:52,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-23 22:32:52,687 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr59ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:52,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:52,688 INFO L85 PathProgramCache]: Analyzing trace with hash 385633541, now seen corresponding path program 1 times [2023-11-23 22:32:52,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:52,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137384971] [2023-11-23 22:32:52,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:52,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:53,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:53,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137384971] [2023-11-23 22:32:53,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137384971] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:53,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782542356] [2023-11-23 22:32:53,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:53,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:53,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:53,154 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 22:32:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:53,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-23 22:32:53,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:53,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:53,389 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:53,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:53,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:53,482 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:53,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:53,523 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:53,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2023-11-23 22:32:53,544 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:53,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-23 22:32:53,666 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-23 22:32:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:53,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:53,841 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array Int Int)) (v_ArrVal_1528 (Array Int Int))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1528))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1530)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-23 22:32:53,847 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1530 (Array Int Int)) (v_ArrVal_1528 (Array Int Int))) (< (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1528))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1530)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2023-11-23 22:32:53,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:53,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 29 [2023-11-23 22:32:53,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:53,865 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 136 treesize of output 123 [2023-11-23 22:32:53,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:53,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 78 [2023-11-23 22:32:53,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 66 [2023-11-23 22:32:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782542356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 22:32:54,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 22:32:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 20 [2023-11-23 22:32:54,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119720139] [2023-11-23 22:32:54,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 22:32:54,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 22:32:54,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 22:32:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=272, Unknown=11, NotChecked=70, Total=420 [2023-11-23 22:32:54,104 INFO L87 Difference]: Start difference. First operand 208 states and 240 transitions. Second operand has 21 states, 20 states have (on average 4.3) internal successors, (86), 21 states have internal predecessors, (86), 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) [2023-11-23 22:32:54,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:54,691 INFO L93 Difference]: Finished difference Result 220 states and 248 transitions. [2023-11-23 22:32:54,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-23 22:32:54,692 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.3) internal successors, (86), 21 states have internal predecessors, (86), 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 42 [2023-11-23 22:32:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:54,693 INFO L225 Difference]: With dead ends: 220 [2023-11-23 22:32:54,694 INFO L226 Difference]: Without dead ends: 220 [2023-11-23 22:32:54,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=584, Unknown=11, NotChecked=106, Total=870 [2023-11-23 22:32:54,695 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 486 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 398 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:54,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [486 Valid, 494 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 518 Invalid, 0 Unknown, 398 Unchecked, 0.4s Time] [2023-11-23 22:32:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-23 22:32:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 209. [2023-11-23 22:32:54,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 176 states have (on average 1.3238636363636365) internal successors, (233), 207 states have internal predecessors, (233), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 241 transitions. [2023-11-23 22:32:54,707 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 241 transitions. Word has length 42 [2023-11-23 22:32:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:54,707 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 241 transitions. [2023-11-23 22:32:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.3) internal successors, (86), 21 states have internal predecessors, (86), 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) [2023-11-23 22:32:54,708 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 241 transitions. [2023-11-23 22:32:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 22:32:54,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:54,709 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:54,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 22:32:54,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-23 22:32:54,915 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:54,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:54,915 INFO L85 PathProgramCache]: Analyzing trace with hash 182413883, now seen corresponding path program 1 times [2023-11-23 22:32:54,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:54,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889438480] [2023-11-23 22:32:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:54,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 22:32:54,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889438480] [2023-11-23 22:32:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889438480] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:54,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:54,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:54,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829104689] [2023-11-23 22:32:54,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:54,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 22:32:54,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 22:32:54,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:54,981 INFO L87 Difference]: Start difference. First operand 209 states and 241 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:55,037 INFO L93 Difference]: Finished difference Result 276 states and 315 transitions. [2023-11-23 22:32:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 22:32:55,037 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-23 22:32:55,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:55,039 INFO L225 Difference]: With dead ends: 276 [2023-11-23 22:32:55,039 INFO L226 Difference]: Without dead ends: 276 [2023-11-23 22:32:55,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 22:32:55,040 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 56 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:55,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 243 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-11-23 22:32:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 228. [2023-11-23 22:32:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 195 states have (on average 1.2974358974358975) internal successors, (253), 226 states have internal predecessors, (253), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 261 transitions. [2023-11-23 22:32:55,047 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 261 transitions. Word has length 43 [2023-11-23 22:32:55,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:55,048 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 261 transitions. [2023-11-23 22:32:55,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,048 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 261 transitions. [2023-11-23 22:32:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 22:32:55,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:55,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:55,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-23 22:32:55,049 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:55,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:55,050 INFO L85 PathProgramCache]: Analyzing trace with hash -930261649, now seen corresponding path program 1 times [2023-11-23 22:32:55,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:55,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701672531] [2023-11-23 22:32:55,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:55,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-23 22:32:55,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701672531] [2023-11-23 22:32:55,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701672531] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 22:32:55,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 22:32:55,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 22:32:55,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569929394] [2023-11-23 22:32:55,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 22:32:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 22:32:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-23 22:32:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 22:32:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 22:32:55,115 INFO L87 Difference]: Start difference. First operand 228 states and 261 transitions. Second operand has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 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) [2023-11-23 22:32:55,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 22:32:55,232 INFO L93 Difference]: Finished difference Result 232 states and 264 transitions. [2023-11-23 22:32:55,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 22:32:55,233 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 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) Word has length 43 [2023-11-23 22:32:55,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 22:32:55,234 INFO L225 Difference]: With dead ends: 232 [2023-11-23 22:32:55,235 INFO L226 Difference]: Without dead ends: 232 [2023-11-23 22:32:55,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 22:32:55,235 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 147 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 22:32:55,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 139 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 22:32:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-23 22:32:55,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 227. [2023-11-23 22:32:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 195 states have (on average 1.2923076923076924) internal successors, (252), 225 states have internal predecessors, (252), 8 states have call successors, (8), 1 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 22:32:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 260 transitions. [2023-11-23 22:32:55,242 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 260 transitions. Word has length 43 [2023-11-23 22:32:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 22:32:55,242 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 260 transitions. [2023-11-23 22:32:55,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.0) internal successors, (42), 4 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) [2023-11-23 22:32:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 260 transitions. [2023-11-23 22:32:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 22:32:55,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 22:32:55,244 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 22:32:55,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-23 22:32:55,244 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 60 more)] === [2023-11-23 22:32:55,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 22:32:55,244 INFO L85 PathProgramCache]: Analyzing trace with hash -864164995, now seen corresponding path program 1 times [2023-11-23 22:32:55,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-23 22:32:55,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518665783] [2023-11-23 22:32:55,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:55,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 22:32:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:56,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-23 22:32:56,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518665783] [2023-11-23 22:32:56,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518665783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 22:32:56,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818533518] [2023-11-23 22:32:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 22:32:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 22:32:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 [2023-11-23 22:32:56,223 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 22:32:56,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce3c5f81-9e84-494a-9fc6-52780e752503/bin/uautomizer-verify-zZY32mL2XJ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 22:32:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 22:32:56,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-23 22:32:56,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 22:32:56,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 22:32:56,527 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 22:32:56,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-23 22:32:56,572 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 [2023-11-23 22:32:56,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 22:32:56,720 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 22:32:56,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2023-11-23 22:32:56,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2023-11-23 22:32:56,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 7 [2023-11-23 22:32:56,863 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:56,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 22:32:56,937 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-11-23 22:32:56,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2023-11-23 22:32:57,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 22:32:57,096 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-11-23 22:32:57,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-11-23 22:32:57,169 INFO L349 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2023-11-23 22:32:57,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-23 22:32:57,307 INFO L349 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2023-11-23 22:32:57,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2023-11-23 22:32:57,426 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2023-11-23 22:32:57,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 47 [2023-11-23 22:32:57,497 INFO L349 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-23 22:32:57,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 56 [2023-11-23 22:32:57,670 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-23 22:32:57,671 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 23 [2023-11-23 22:32:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 22:32:57,675 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 22:32:57,793 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1802 (Array Int Int)) (v_ArrVal_1804 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1802))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1804)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-23 22:32:57,801 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1802 (Array Int Int)) (v_ArrVal_1804 (Array Int Int))) (not (= (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1802))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1804)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-23 22:32:57,822 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1802 (Array Int Int)) (v_ArrVal_1804 (Array Int Int))) (not (= (select (select (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset| |c_ULTIMATE.start_main_#t~malloc3#1.base|)) |c_ULTIMATE.start_main_#t~malloc3#1.base| v_ArrVal_1802))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~item~0#1.base|) |c_ULTIMATE.start_main_~item~0#1.offset|) v_ArrVal_1804)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 0))) is different from false [2023-11-23 22:32:58,031 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 22:32:58,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34