./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-middle-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-middle-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 003ead3201cb38ecc17dca4c0dd7fb7b12eace11010ba9f6077aefef97bddb9b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 13:06:22,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 13:06:22,284 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 13:06:22,289 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 13:06:22,289 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 13:06:22,324 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 13:06:22,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 13:06:22,325 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 13:06:22,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 13:06:22,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 13:06:22,327 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 13:06:22,327 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 13:06:22,328 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 13:06:22,328 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 13:06:22,328 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 13:06:22,329 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 13:06:22,329 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 13:06:22,330 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 13:06:22,330 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 13:06:22,331 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 13:06:22,331 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 13:06:22,332 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 13:06:22,333 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 13:06:22,333 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 13:06:22,334 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 13:06:22,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 13:06:22,335 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 13:06:22,335 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 13:06:22,335 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 13:06:22,336 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 13:06:22,336 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 13:06:22,336 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 13:06:22,337 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 13:06:22,337 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 13:06:22,338 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 13:06:22,338 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 13:06:22,338 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 13:06:22,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:06:22,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 13:06:22,339 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 13:06:22,339 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 13:06:22,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 13:06:22,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 13:06:22,340 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 13:06:22,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 13:06:22,340 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 003ead3201cb38ecc17dca4c0dd7fb7b12eace11010ba9f6077aefef97bddb9b [2023-12-02 13:06:22,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 13:06:22,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 13:06:22,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 13:06:22,599 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 13:06:22,600 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 13:06:22,601 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-middle-shared.i [2023-12-02 13:06:25,385 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 13:06:25,654 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 13:06:25,655 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/sv-benchmarks/c/memsafety-broom/sll-middle-shared.i [2023-12-02 13:06:25,682 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/data/6714ee6ce/441fa73bb7c3456d983e895ba0c22a05/FLAGb52475538 [2023-12-02 13:06:25,695 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/data/6714ee6ce/441fa73bb7c3456d983e895ba0c22a05 [2023-12-02 13:06:25,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 13:06:25,698 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 13:06:25,699 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 13:06:25,700 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 13:06:25,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 13:06:25,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:06:25" (1/1) ... [2023-12-02 13:06:25,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f341e9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:25, skipping insertion in model container [2023-12-02 13:06:25,706 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:06:25" (1/1) ... [2023-12-02 13:06:25,764 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 13:06:26,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:06:26,029 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 13:06:26,066 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 13:06:26,091 INFO L206 MainTranslator]: Completed translation [2023-12-02 13:06:26,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26 WrapperNode [2023-12-02 13:06:26,092 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 13:06:26,093 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 13:06:26,093 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 13:06:26,093 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 13:06:26,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,112 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,133 INFO L138 Inliner]: procedures = 121, calls = 31, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 95 [2023-12-02 13:06:26,133 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 13:06:26,134 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 13:06:26,134 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 13:06:26,135 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 13:06:26,142 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,158 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,165 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 13:06:26,166 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 13:06:26,166 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 13:06:26,166 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 13:06:26,167 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (1/1) ... [2023-12-02 13:06:26,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 13:06:26,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:26,191 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 13:06:26,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 13:06:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 13:06:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 13:06:26,249 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 13:06:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 13:06:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 13:06:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 13:06:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 13:06:26,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 13:06:26,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 13:06:26,358 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 13:06:26,359 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 13:06:26,647 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 13:06:26,691 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 13:06:26,691 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 13:06:26,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:06:26 BoogieIcfgContainer [2023-12-02 13:06:26,693 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 13:06:26,696 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 13:06:26,696 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 13:06:26,699 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 13:06:26,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:06:25" (1/3) ... [2023-12-02 13:06:26,700 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5a350e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:06:26, skipping insertion in model container [2023-12-02 13:06:26,700 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:06:26" (2/3) ... [2023-12-02 13:06:26,701 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5a350e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:06:26, skipping insertion in model container [2023-12-02 13:06:26,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:06:26" (3/3) ... [2023-12-02 13:06:26,702 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-middle-shared.i [2023-12-02 13:06:26,720 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 13:06:26,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-12-02 13:06:26,765 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 13:06:26,772 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=FINITE_AUTOMATA, 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;@612f0120, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 13:06:26,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-12-02 13:06:26,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 36 states have (on average 2.361111111111111) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:06:26,781 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:26,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:06:26,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:26,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:26,787 INFO L85 PathProgramCache]: Analyzing trace with hash 5586295, now seen corresponding path program 1 times [2023-12-02 13:06:26,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:26,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273239216] [2023-12-02 13:06:26,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:26,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:26,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:26,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:26,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273239216] [2023-12-02 13:06:26,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273239216] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:26,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:26,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:26,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821933339] [2023-12-02 13:06:26,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:26,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:26,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,028 INFO L87 Difference]: Start difference. First operand has 84 states, 36 states have (on average 2.361111111111111) internal successors, (85), 80 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 13:06:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:27,150 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2023-12-02 13:06:27,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:27,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-12-02 13:06:27,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:27,160 INFO L225 Difference]: With dead ends: 83 [2023-12-02 13:06:27,160 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 13:06:27,162 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 [2023-12-02 13:06:27,165 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:27,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 108 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 13:06:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-02 13:06:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 78 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2023-12-02 13:06:27,206 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 4 [2023-12-02 13:06:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:27,206 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2023-12-02 13:06:27,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 13:06:27,207 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2023-12-02 13:06:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 13:06:27,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:27,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 13:06:27,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 13:06:27,208 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:27,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash 5586296, now seen corresponding path program 1 times [2023-12-02 13:06:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014512630] [2023-12-02 13:06:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:27,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:27,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:27,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014512630] [2023-12-02 13:06:27,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014512630] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:27,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:27,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:27,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438172488] [2023-12-02 13:06:27,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:27,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:27,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,295 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 13:06:27,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:27,378 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-12-02 13:06:27,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:27,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-12-02 13:06:27,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:27,380 INFO L225 Difference]: With dead ends: 81 [2023-12-02 13:06:27,381 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 13:06:27,381 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 [2023-12-02 13:06:27,383 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:27,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 115 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:27,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 13:06:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 13:06:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 36 states have (on average 2.25) internal successors, (81), 77 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2023-12-02 13:06:27,392 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 4 [2023-12-02 13:06:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:27,392 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2023-12-02 13:06:27,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-12-02 13:06:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2023-12-02 13:06:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:06:27,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:27,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:27,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 13:06:27,394 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:27,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:27,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1078014263, now seen corresponding path program 1 times [2023-12-02 13:06:27,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:27,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156399552] [2023-12-02 13:06:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:27,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:27,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156399552] [2023-12-02 13:06:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156399552] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:27,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:27,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:27,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093321902] [2023-12-02 13:06:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:27,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:27,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,466 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:27,582 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2023-12-02 13:06:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:06:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:27,588 INFO L225 Difference]: With dead ends: 84 [2023-12-02 13:06:27,589 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 13:06:27,589 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 [2023-12-02 13:06:27,591 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:27,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 97 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:27,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 13:06:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2023-12-02 13:06:27,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 76 states have internal predecessors, (80), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2023-12-02 13:06:27,601 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 7 [2023-12-02 13:06:27,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:27,602 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2023-12-02 13:06:27,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,602 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2023-12-02 13:06:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 13:06:27,603 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:27,603 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:27,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 13:06:27,603 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:27,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1078014262, now seen corresponding path program 1 times [2023-12-02 13:06:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325119756] [2023-12-02 13:06:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:27,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:27,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:27,678 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:27,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325119756] [2023-12-02 13:06:27,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325119756] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:27,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:27,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:27,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040209781] [2023-12-02 13:06:27,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:27,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:27,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,681 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:27,751 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2023-12-02 13:06:27,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:27,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2023-12-02 13:06:27,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:27,752 INFO L225 Difference]: With dead ends: 83 [2023-12-02 13:06:27,753 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 13:06:27,753 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 [2023-12-02 13:06:27,754 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:27,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 104 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:27,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 13:06:27,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2023-12-02 13:06:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:27,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2023-12-02 13:06:27,763 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 7 [2023-12-02 13:06:27,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:27,763 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2023-12-02 13:06:27,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2023-12-02 13:06:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:06:27,764 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:27,764 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 13:06:27,765 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:27,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash 941300695, now seen corresponding path program 1 times [2023-12-02 13:06:27,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:27,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830880481] [2023-12-02 13:06:27,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:27,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:27,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:27,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830880481] [2023-12-02 13:06:27,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830880481] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:27,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054620280] [2023-12-02 13:06:27,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:27,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,824 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:27,892 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2023-12-02 13:06:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:06:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:27,894 INFO L225 Difference]: With dead ends: 82 [2023-12-02 13:06:27,894 INFO L226 Difference]: Without dead ends: 82 [2023-12-02 13:06:27,894 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 [2023-12-02 13:06:27,895 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:27,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 96 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:27,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-02 13:06:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2023-12-02 13:06:27,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-12-02 13:06:27,903 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 8 [2023-12-02 13:06:27,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:27,903 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-12-02 13:06:27,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-12-02 13:06:27,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 13:06:27,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:27,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:27,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 13:06:27,904 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:27,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:27,905 INFO L85 PathProgramCache]: Analyzing trace with hash 941300696, now seen corresponding path program 1 times [2023-12-02 13:06:27,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:27,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301047394] [2023-12-02 13:06:27,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:27,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:27,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:27,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301047394] [2023-12-02 13:06:27,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301047394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:27,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 13:06:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676935760] [2023-12-02 13:06:27,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:27,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 13:06:27,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:27,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 13:06:27,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 13:06:27,980 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:28,056 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2023-12-02 13:06:28,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 13:06:28,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-12-02 13:06:28,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:28,058 INFO L225 Difference]: With dead ends: 81 [2023-12-02 13:06:28,058 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 13:06:28,058 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 [2023-12-02 13:06:28,059 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 10 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:28,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 13:06:28,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2023-12-02 13:06:28,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 36 states have (on average 2.138888888888889) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:28,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-12-02 13:06:28,066 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 8 [2023-12-02 13:06:28,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:28,066 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-12-02 13:06:28,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-12-02 13:06:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:06:28,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:28,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 13:06:28,068 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -884445477, now seen corresponding path program 1 times [2023-12-02 13:06:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731642714] [2023-12-02 13:06:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:28,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:28,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731642714] [2023-12-02 13:06:28,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731642714] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:28,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:28,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:06:28,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564270819] [2023-12-02 13:06:28,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:28,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:06:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:06:28,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:28,255 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:28,426 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2023-12-02 13:06:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:06:28,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 13:06:28,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:28,428 INFO L225 Difference]: With dead ends: 76 [2023-12-02 13:06:28,428 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 13:06:28,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:06:28,430 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 37 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:28,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 163 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:06:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 13:06:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2023-12-02 13:06:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 36 states have (on average 2.0) internal successors, (72), 68 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2023-12-02 13:06:28,436 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 9 [2023-12-02 13:06:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:28,437 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2023-12-02 13:06:28,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2023-12-02 13:06:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 13:06:28,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:28,438 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:28,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 13:06:28,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:28,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:28,439 INFO L85 PathProgramCache]: Analyzing trace with hash -884445476, now seen corresponding path program 1 times [2023-12-02 13:06:28,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:28,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566323244] [2023-12-02 13:06:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:28,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:28,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:28,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:28,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566323244] [2023-12-02 13:06:28,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566323244] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:28,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:28,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:06:28,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375620828] [2023-12-02 13:06:28,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:28,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:06:28,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:28,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:06:28,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:28,688 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:28,863 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-12-02 13:06:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:06:28,863 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-12-02 13:06:28,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:28,864 INFO L225 Difference]: With dead ends: 74 [2023-12-02 13:06:28,864 INFO L226 Difference]: Without dead ends: 74 [2023-12-02 13:06:28,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:06:28,865 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 12 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:28,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 152 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:28,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-12-02 13:06:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2023-12-02 13:06:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 66 states have internal predecessors, (70), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:28,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2023-12-02 13:06:28,871 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 9 [2023-12-02 13:06:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:28,871 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2023-12-02 13:06:28,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:28,872 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2023-12-02 13:06:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:06:28,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:28,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:28,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 13:06:28,873 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:28,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:28,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1442868952, now seen corresponding path program 1 times [2023-12-02 13:06:28,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:28,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828870483] [2023-12-02 13:06:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:28,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:28,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:28,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828870483] [2023-12-02 13:06:28,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828870483] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:28,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:28,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:06:28,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740780936] [2023-12-02 13:06:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:06:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:06:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:06:28,982 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:29,128 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2023-12-02 13:06:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:06:29,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 13:06:29,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:29,130 INFO L225 Difference]: With dead ends: 94 [2023-12-02 13:06:29,130 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 13:06:29,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:06:29,131 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:29,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 163 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:29,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 13:06:29,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2023-12-02 13:06:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.9183673469387754) internal successors, (94), 77 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 100 transitions. [2023-12-02 13:06:29,138 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 100 transitions. Word has length 15 [2023-12-02 13:06:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:29,139 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 100 transitions. [2023-12-02 13:06:29,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 100 transitions. [2023-12-02 13:06:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 13:06:29,140 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:29,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:29,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 13:06:29,140 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:29,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:29,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1442868953, now seen corresponding path program 1 times [2023-12-02 13:06:29,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:29,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680769975] [2023-12-02 13:06:29,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:29,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:29,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:29,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680769975] [2023-12-02 13:06:29,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680769975] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:29,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:29,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:06:29,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338133498] [2023-12-02 13:06:29,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:29,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:06:29,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:06:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:06:29,333 INFO L87 Difference]: Start difference. First operand 82 states and 100 transitions. Second operand has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:29,501 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-12-02 13:06:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:06:29,502 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-12-02 13:06:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:29,503 INFO L225 Difference]: With dead ends: 96 [2023-12-02 13:06:29,503 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 13:06:29,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:06:29,504 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 22 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:29,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 294 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:29,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 13:06:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 87. [2023-12-02 13:06:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.8518518518518519) internal successors, (100), 82 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:29,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-12-02 13:06:29,510 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 15 [2023-12-02 13:06:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:29,510 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-12-02 13:06:29,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,511 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-12-02 13:06:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 13:06:29,512 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:29,512 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:29,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 13:06:29,512 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:29,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:29,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1779351694, now seen corresponding path program 1 times [2023-12-02 13:06:29,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:29,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772928343] [2023-12-02 13:06:29,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:29,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:29,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772928343] [2023-12-02 13:06:29,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772928343] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:29,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:29,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:06:29,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493394248] [2023-12-02 13:06:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:29,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:06:29,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:06:29,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:29,596 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:29,685 INFO L93 Difference]: Finished difference Result 95 states and 112 transitions. [2023-12-02 13:06:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:06:29,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-12-02 13:06:29,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:29,687 INFO L225 Difference]: With dead ends: 95 [2023-12-02 13:06:29,687 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 13:06:29,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:06:29,688 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:29,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 307 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:29,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 13:06:29,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 88. [2023-12-02 13:06:29,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.8) internal successors, (99), 83 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:29,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2023-12-02 13:06:29,693 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 16 [2023-12-02 13:06:29,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:29,694 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2023-12-02 13:06:29,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:29,694 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2023-12-02 13:06:29,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:06:29,695 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:29,695 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 13:06:29,695 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:29,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash -628652332, now seen corresponding path program 1 times [2023-12-02 13:06:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331293497] [2023-12-02 13:06:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:29,822 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:29,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331293497] [2023-12-02 13:06:29,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331293497] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:29,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:29,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:06:29,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976199706] [2023-12-02 13:06:29,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:29,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:06:29,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:29,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:06:29,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:06:29,823 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:29,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:29,964 INFO L93 Difference]: Finished difference Result 89 states and 104 transitions. [2023-12-02 13:06:29,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 13:06:29,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-02 13:06:29,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:29,965 INFO L225 Difference]: With dead ends: 89 [2023-12-02 13:06:29,965 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 13:06:29,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:29,966 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:29,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:29,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 13:06:29,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-12-02 13:06:29,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 83 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2023-12-02 13:06:29,971 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 17 [2023-12-02 13:06:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:29,971 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2023-12-02 13:06:29,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:29,972 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2023-12-02 13:06:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 13:06:29,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:29,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:29,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 13:06:29,973 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:29,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:29,973 INFO L85 PathProgramCache]: Analyzing trace with hash -628652331, now seen corresponding path program 1 times [2023-12-02 13:06:29,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:29,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907890464] [2023-12-02 13:06:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:29,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:30,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907890464] [2023-12-02 13:06:30,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907890464] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:30,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955731280] [2023-12-02 13:06:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:30,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:30,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:30,264 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:30,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 13:06:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:30,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 13:06:30,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:30,506 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:06:30,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:06:30,550 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 16 treesize of output 11 [2023-12-02 13:06:30,563 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:06:30,563 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 [2023-12-02 13:06:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:30,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:06:30,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955731280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:30,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:06:30,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2023-12-02 13:06:30,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555843790] [2023-12-02 13:06:30,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:30,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:06:30,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:30,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:06:30,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2023-12-02 13:06:30,587 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:30,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:30,727 INFO L93 Difference]: Finished difference Result 92 states and 100 transitions. [2023-12-02 13:06:30,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:06:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2023-12-02 13:06:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:30,728 INFO L225 Difference]: With dead ends: 92 [2023-12-02 13:06:30,729 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 13:06:30,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2023-12-02 13:06:30,730 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 28 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:30,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 132 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2023-12-02 13:06:30,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 13:06:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2023-12-02 13:06:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.709090909090909) internal successors, (94), 83 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2023-12-02 13:06:30,734 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 17 [2023-12-02 13:06:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:30,734 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2023-12-02 13:06:30,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:06:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2023-12-02 13:06:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:06:30,735 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:30,735 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:30,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 13:06:30,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:30,941 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:30,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1455607561, now seen corresponding path program 1 times [2023-12-02 13:06:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:30,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912995830] [2023-12-02 13:06:30,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 13:06:31,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:31,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912995830] [2023-12-02 13:06:31,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912995830] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:31,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:31,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 13:06:31,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802298666] [2023-12-02 13:06:31,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:31,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 13:06:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:31,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 13:06:31,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 13:06:31,081 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:06:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:31,218 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-02 13:06:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 13:06:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-12-02 13:06:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:31,219 INFO L225 Difference]: With dead ends: 87 [2023-12-02 13:06:31,220 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 13:06:31,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:31,220 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:31,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 173 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 13:06:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 13:06:31,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 82 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2023-12-02 13:06:31,224 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2023-12-02 13:06:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:31,225 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2023-12-02 13:06:31,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:06:31,225 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2023-12-02 13:06:31,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:06:31,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:31,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:31,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 13:06:31,226 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:31,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:31,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1455607562, now seen corresponding path program 1 times [2023-12-02 13:06:31,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:31,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079421652] [2023-12-02 13:06:31,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:31,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:06:31,496 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:31,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079421652] [2023-12-02 13:06:31,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079421652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:31,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:06:31,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:06:31,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323126056] [2023-12-02 13:06:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:31,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:06:31,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:06:31,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:06:31,499 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:06:31,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:06:31,659 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2023-12-02 13:06:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 13:06:31,660 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2023-12-02 13:06:31,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:06:31,660 INFO L225 Difference]: With dead ends: 86 [2023-12-02 13:06:31,661 INFO L226 Difference]: Without dead ends: 86 [2023-12-02 13:06:31,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 13:06:31,661 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 5 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:06:31,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 221 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:06:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-12-02 13:06:31,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-12-02 13:06:31,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 55 states have (on average 1.6363636363636365) internal successors, (90), 81 states have internal predecessors, (90), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:06:31,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2023-12-02 13:06:31,665 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 19 [2023-12-02 13:06:31,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:06:31,666 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2023-12-02 13:06:31,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:06:31,666 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2023-12-02 13:06:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 13:06:31,667 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:06:31,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:06:31,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 13:06:31,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:06:31,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:06:31,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1882686172, now seen corresponding path program 1 times [2023-12-02 13:06:31,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:06:31,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459489147] [2023-12-02 13:06:31,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:31,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:06:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:32,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:06:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459489147] [2023-12-02 13:06:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459489147] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:06:32,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884119362] [2023-12-02 13:06:32,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:06:32,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:06:32,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:06:32,364 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:06:32,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 13:06:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:06:32,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-02 13:06:32,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:06:32,501 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 [2023-12-02 13:06:32,530 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 [2023-12-02 13:06:32,537 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 [2023-12-02 13:06:32,620 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:06:32,621 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 [2023-12-02 13:06:32,699 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 [2023-12-02 13:06:32,704 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 [2023-12-02 13:06:32,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 13:06:32,788 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 13:06:32,788 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 [2023-12-02 13:06:32,820 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 13:06:32,820 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 [2023-12-02 13:06:32,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:06:32,906 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 23 treesize of output 22 [2023-12-02 13:06:32,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:06:32,920 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 27 treesize of output 15 [2023-12-02 13:06:33,002 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-02 13:06:33,003 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 15 treesize of output 15 [2023-12-02 13:06:33,015 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-02 13:06:33,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-02 13:06:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:33,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:06:33,621 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 22 treesize of output 20 [2023-12-02 13:06:34,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:06:34,336 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 83 treesize of output 84 [2023-12-02 13:06:34,346 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:06:34,347 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 [2023-12-02 13:06:34,360 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:06:34,361 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 188 treesize of output 178 [2023-12-02 13:06:34,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:06:34,380 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 192 treesize of output 182 [2023-12-02 13:06:34,392 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 71 treesize of output 67 [2023-12-02 13:06:34,399 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 67 treesize of output 63 [2023-12-02 13:06:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:06:34,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884119362] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:06:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [763941007] [2023-12-02 13:06:34,701 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 13:06:34,701 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:06:34,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:06:34,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:06:34,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:06:36,277 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:06:36,285 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:06:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [763941007] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:06:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:06:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [12, 12, 13] total 45 [2023-12-02 13:06:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114132957] [2023-12-02 13:06:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:06:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 13:06:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:06:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 13:06:51,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=1743, Unknown=9, NotChecked=0, Total=1980 [2023-12-02 13:06:51,151 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:06:55,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:06:57,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:06:59,919 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:07:03,355 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:07:05,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:07:06,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:06,980 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2023-12-02 13:07:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:07:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 13:07:06,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:06,981 INFO L225 Difference]: With dead ends: 93 [2023-12-02 13:07:06,981 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 13:07:06,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 573 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=228, Invalid=1743, Unknown=9, NotChecked=0, Total=1980 [2023-12-02 13:07:06,983 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 3 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.8s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:06,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 176 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 662 Invalid, 12 Unknown, 0 Unchecked, 15.8s Time] [2023-12-02 13:07:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 13:07:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2023-12-02 13:07:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-12-02 13:07:06,985 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 19 [2023-12-02 13:07:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:06,986 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-12-02 13:07:06,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-12-02 13:07:06,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:07:06,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:06,987 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] [2023-12-02 13:07:06,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 13:07:07,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 13:07:07,187 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:07,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:07,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1766183670, now seen corresponding path program 1 times [2023-12-02 13:07:07,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:07,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817390999] [2023-12-02 13:07:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:07,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:07,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:07,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:07,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817390999] [2023-12-02 13:07:07,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817390999] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:07,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:07,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 13:07:07,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971873483] [2023-12-02 13:07:07,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:07,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 13:07:07,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:07,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 13:07:07,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 13:07:07,287 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:07,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:07,476 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2023-12-02 13:07:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:07:07,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 13:07:07,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:07,479 INFO L225 Difference]: With dead ends: 119 [2023-12-02 13:07:07,479 INFO L226 Difference]: Without dead ends: 119 [2023-12-02 13:07:07,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:07:07,480 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:07,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 154 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-12-02 13:07:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 97. [2023-12-02 13:07:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 91 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 116 transitions. [2023-12-02 13:07:07,485 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 116 transitions. Word has length 20 [2023-12-02 13:07:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:07,485 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 116 transitions. [2023-12-02 13:07:07,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 116 transitions. [2023-12-02 13:07:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 13:07:07,486 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:07,486 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] [2023-12-02 13:07:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-02 13:07:07,487 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:07,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1766183669, now seen corresponding path program 1 times [2023-12-02 13:07:07,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:07,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391578027] [2023-12-02 13:07:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:07:07,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391578027] [2023-12-02 13:07:07,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391578027] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:07:07,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557135599] [2023-12-02 13:07:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:07,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:07:07,674 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:07:07,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 13:07:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:07,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 13:07:07,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:07:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:07,892 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 13:07:07,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557135599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:07,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 13:07:07,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 12 [2023-12-02 13:07:07,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093410276] [2023-12-02 13:07:07,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:07,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:07:07,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:07,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:07:07,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:07:07,894 INFO L87 Difference]: Start difference. First operand 97 states and 116 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:08,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:08,139 INFO L93 Difference]: Finished difference Result 135 states and 155 transitions. [2023-12-02 13:07:08,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 13:07:08,139 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 13:07:08,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:08,140 INFO L225 Difference]: With dead ends: 135 [2023-12-02 13:07:08,141 INFO L226 Difference]: Without dead ends: 135 [2023-12-02 13:07:08,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-12-02 13:07:08,142 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 73 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:08,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 298 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:08,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-12-02 13:07:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2023-12-02 13:07:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 80 states have (on average 1.6875) internal successors, (135), 105 states have internal predecessors, (135), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 141 transitions. [2023-12-02 13:07:08,147 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 141 transitions. Word has length 20 [2023-12-02 13:07:08,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:08,147 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 141 transitions. [2023-12-02 13:07:08,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:08,148 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 141 transitions. [2023-12-02 13:07:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:07:08,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:08,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:08,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 13:07:08,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 13:07:08,353 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:08,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:08,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1320366118, now seen corresponding path program 1 times [2023-12-02 13:07:08,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:08,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567299584] [2023-12-02 13:07:08,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:08,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:08,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:07:08,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:08,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567299584] [2023-12-02 13:07:08,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567299584] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:08,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:08,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:07:08,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030703273] [2023-12-02 13:07:08,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:08,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:07:08,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:08,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:07:08,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:08,623 INFO L87 Difference]: Start difference. First operand 111 states and 141 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:07:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:08,897 INFO L93 Difference]: Finished difference Result 112 states and 140 transitions. [2023-12-02 13:07:08,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:07:08,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-02 13:07:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:08,899 INFO L225 Difference]: With dead ends: 112 [2023-12-02 13:07:08,899 INFO L226 Difference]: Without dead ends: 112 [2023-12-02 13:07:08,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:07:08,900 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 20 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:08,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 273 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-02 13:07:08,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-12-02 13:07:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 80 states have (on average 1.675) internal successors, (134), 105 states have internal predecessors, (134), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2023-12-02 13:07:08,905 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 21 [2023-12-02 13:07:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:08,906 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2023-12-02 13:07:08,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:07:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2023-12-02 13:07:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:07:08,907 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:08,907 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:08,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 13:07:08,907 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:08,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:08,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1320366117, now seen corresponding path program 1 times [2023-12-02 13:07:08,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:08,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159745536] [2023-12-02 13:07:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:08,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:09,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:07:09,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159745536] [2023-12-02 13:07:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159745536] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:09,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:09,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:07:09,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476121995] [2023-12-02 13:07:09,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:09,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:07:09,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:09,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:07:09,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:09,299 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:07:09,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:09,550 INFO L93 Difference]: Finished difference Result 111 states and 139 transitions. [2023-12-02 13:07:09,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 13:07:09,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-12-02 13:07:09,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:09,551 INFO L225 Difference]: With dead ends: 111 [2023-12-02 13:07:09,552 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 13:07:09,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:07:09,552 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 18 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:09,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 255 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 13:07:09,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-12-02 13:07:09,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 80 states have (on average 1.6625) internal successors, (133), 105 states have internal predecessors, (133), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 139 transitions. [2023-12-02 13:07:09,558 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 139 transitions. Word has length 21 [2023-12-02 13:07:09,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:09,558 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 139 transitions. [2023-12-02 13:07:09,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 13:07:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 139 transitions. [2023-12-02 13:07:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:07:09,559 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:09,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:09,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 13:07:09,560 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:09,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:09,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1082902481, now seen corresponding path program 1 times [2023-12-02 13:07:09,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:09,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028533601] [2023-12-02 13:07:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:09,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:09,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:09,656 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:09,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028533601] [2023-12-02 13:07:09,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028533601] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:09,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:09,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 13:07:09,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831938567] [2023-12-02 13:07:09,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:09,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:07:09,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:09,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:07:09,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:07:09,658 INFO L87 Difference]: Start difference. First operand 111 states and 139 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:09,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:09,765 INFO L93 Difference]: Finished difference Result 116 states and 137 transitions. [2023-12-02 13:07:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:07:09,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-12-02 13:07:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:09,767 INFO L225 Difference]: With dead ends: 116 [2023-12-02 13:07:09,767 INFO L226 Difference]: Without dead ends: 116 [2023-12-02 13:07:09,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:07:09,768 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 84 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:09,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 240 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:07:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-12-02 13:07:09,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2023-12-02 13:07:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5974025974025974) internal successors, (123), 102 states have internal predecessors, (123), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2023-12-02 13:07:09,773 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 21 [2023-12-02 13:07:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:09,773 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2023-12-02 13:07:09,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2023-12-02 13:07:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 13:07:09,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:09,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:09,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 13:07:09,775 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:09,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:09,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1082881143, now seen corresponding path program 1 times [2023-12-02 13:07:09,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:09,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630387802] [2023-12-02 13:07:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:09,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:09,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:09,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:09,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630387802] [2023-12-02 13:07:09,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630387802] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:09,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:09,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:07:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358686186] [2023-12-02 13:07:09,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:09,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:07:09,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:09,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:07:09,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:07:09,964 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:10,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:10,167 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2023-12-02 13:07:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:07:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-12-02 13:07:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:10,169 INFO L225 Difference]: With dead ends: 129 [2023-12-02 13:07:10,170 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 13:07:10,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:10,170 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 74 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:10,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 247 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:10,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 13:07:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 108. [2023-12-02 13:07:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5844155844155845) internal successors, (122), 102 states have internal predecessors, (122), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 128 transitions. [2023-12-02 13:07:10,175 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 128 transitions. Word has length 21 [2023-12-02 13:07:10,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:10,176 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 128 transitions. [2023-12-02 13:07:10,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:10,176 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 128 transitions. [2023-12-02 13:07:10,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 13:07:10,177 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:10,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:10,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 13:07:10,178 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:10,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash -790422806, now seen corresponding path program 1 times [2023-12-02 13:07:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072071777] [2023-12-02 13:07:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:10,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:10,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072071777] [2023-12-02 13:07:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072071777] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:07:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111028616] [2023-12-02 13:07:10,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:10,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:07:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:07:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:07:10,395 INFO L87 Difference]: Start difference. First operand 108 states and 128 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:10,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:10,629 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2023-12-02 13:07:10,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:07:10,630 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-12-02 13:07:10,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:10,630 INFO L225 Difference]: With dead ends: 128 [2023-12-02 13:07:10,630 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 13:07:10,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:10,631 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 69 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:10,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 176 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 13:07:10,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 108. [2023-12-02 13:07:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5714285714285714) internal successors, (121), 102 states have internal predecessors, (121), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 127 transitions. [2023-12-02 13:07:10,636 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 127 transitions. Word has length 22 [2023-12-02 13:07:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:10,636 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 127 transitions. [2023-12-02 13:07:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 127 transitions. [2023-12-02 13:07:10,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 13:07:10,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:10,637 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] [2023-12-02 13:07:10,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-12-02 13:07:10,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:10,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:10,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1266696921, now seen corresponding path program 1 times [2023-12-02 13:07:10,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:10,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437563633] [2023-12-02 13:07:10,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:10,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:10,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:10,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437563633] [2023-12-02 13:07:10,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437563633] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:10,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:10,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 13:07:10,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391048917] [2023-12-02 13:07:10,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:10,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 13:07:10,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:10,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 13:07:10,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:07:10,910 INFO L87 Difference]: Start difference. First operand 108 states and 127 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:11,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:11,160 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2023-12-02 13:07:11,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:07:11,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-12-02 13:07:11,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:11,161 INFO L225 Difference]: With dead ends: 108 [2023-12-02 13:07:11,162 INFO L226 Difference]: Without dead ends: 108 [2023-12-02 13:07:11,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:07:11,162 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 21 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:11,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 272 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:11,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-12-02 13:07:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-12-02 13:07:11,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5584415584415585) internal successors, (120), 102 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 126 transitions. [2023-12-02 13:07:11,167 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 126 transitions. Word has length 23 [2023-12-02 13:07:11,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:11,167 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 126 transitions. [2023-12-02 13:07:11,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:11,167 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 126 transitions. [2023-12-02 13:07:11,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 13:07:11,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:11,168 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:11,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-12-02 13:07:11,169 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:11,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:11,169 INFO L85 PathProgramCache]: Analyzing trace with hash 612899021, now seen corresponding path program 1 times [2023-12-02 13:07:11,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:11,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481954997] [2023-12-02 13:07:11,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:11,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:11,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:11,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:11,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481954997] [2023-12-02 13:07:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481954997] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:11,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:11,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:07:11,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291514442] [2023-12-02 13:07:11,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:11,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:07:11,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:11,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:07:11,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:11,472 INFO L87 Difference]: Start difference. First operand 108 states and 126 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:11,675 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2023-12-02 13:07:11,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:07:11,675 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-12-02 13:07:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:11,676 INFO L225 Difference]: With dead ends: 111 [2023-12-02 13:07:11,676 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 13:07:11,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:07:11,677 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 48 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:11,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 204 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 13:07:11,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2023-12-02 13:07:11,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 102 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:11,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 125 transitions. [2023-12-02 13:07:11,680 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 125 transitions. Word has length 24 [2023-12-02 13:07:11,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:11,680 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 125 transitions. [2023-12-02 13:07:11,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 125 transitions. [2023-12-02 13:07:11,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 13:07:11,681 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:11,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:11,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 13:07:11,681 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:11,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:11,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1820000541, now seen corresponding path program 1 times [2023-12-02 13:07:11,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:11,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656520291] [2023-12-02 13:07:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:11,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:11,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:11,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656520291] [2023-12-02 13:07:11,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656520291] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:11,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:11,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:07:11,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123051936] [2023-12-02 13:07:11,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:11,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:07:11,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:11,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:07:11,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:11,962 INFO L87 Difference]: Start difference. First operand 108 states and 125 transitions. Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:12,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:12,217 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2023-12-02 13:07:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:07:12,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-12-02 13:07:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:12,219 INFO L225 Difference]: With dead ends: 125 [2023-12-02 13:07:12,219 INFO L226 Difference]: Without dead ends: 125 [2023-12-02 13:07:12,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:07:12,220 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:12,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 362 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-12-02 13:07:12,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 108. [2023-12-02 13:07:12,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5324675324675325) internal successors, (118), 102 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:12,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 124 transitions. [2023-12-02 13:07:12,224 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 124 transitions. Word has length 25 [2023-12-02 13:07:12,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:12,225 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 124 transitions. [2023-12-02 13:07:12,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 124 transitions. [2023-12-02 13:07:12,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 13:07:12,225 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:12,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:12,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-12-02 13:07:12,226 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:12,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 585442061, now seen corresponding path program 1 times [2023-12-02 13:07:12,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:12,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758267889] [2023-12-02 13:07:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:12,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:12,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758267889] [2023-12-02 13:07:12,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758267889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:12,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:12,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 13:07:12,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672798666] [2023-12-02 13:07:12,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:12,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 13:07:12,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:12,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 13:07:12,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-02 13:07:12,568 INFO L87 Difference]: Start difference. First operand 108 states and 124 transitions. Second operand has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:12,787 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2023-12-02 13:07:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 13:07:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-12-02 13:07:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:12,788 INFO L225 Difference]: With dead ends: 124 [2023-12-02 13:07:12,788 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 13:07:12,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-12-02 13:07:12,789 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 63 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:12,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 287 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:12,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 13:07:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2023-12-02 13:07:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 77 states have (on average 1.5194805194805194) internal successors, (117), 102 states have internal predecessors, (117), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 123 transitions. [2023-12-02 13:07:12,792 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 123 transitions. Word has length 26 [2023-12-02 13:07:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:12,793 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 123 transitions. [2023-12-02 13:07:12,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:12,793 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 123 transitions. [2023-12-02 13:07:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:07:12,793 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:12,794 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] [2023-12-02 13:07:12,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-12-02 13:07:12,794 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:12,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1259550393, now seen corresponding path program 1 times [2023-12-02 13:07:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657644262] [2023-12-02 13:07:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:12,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:12,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:12,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657644262] [2023-12-02 13:07:12,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657644262] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:07:12,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014910789] [2023-12-02 13:07:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:12,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:12,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:07:12,979 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:07:12,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 13:07:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:13,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-02 13:07:13,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:07:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:13,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:07:13,296 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:07:13,296 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 19 treesize of output 23 [2023-12-02 13:07:13,441 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:13,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014910789] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:07:13,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [982600936] [2023-12-02 13:07:13,444 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 13:07:13,445 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:07:13,445 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:07:13,445 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:07:13,445 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:07:20,063 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:07:20,083 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:07:56,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5997#(and (exists ((|v_#memory_$Pointer$.offset_115| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~0#1.offset_34| Int) (|v_#memory_$Pointer$.base_115| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_114| (Array Int (Array Int Int))) (|v_#memory_int_90| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~now~0#1.base_40| Int) (|v_#memory_int_91| (Array Int (Array Int Int))) (|v_#memory_int_92| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~data1~0#1.base_22| Int) (|v_ULTIMATE.start_create_~data1~0#1.offset_21| Int) (|v_#memory_$Pointer$.offset_114| (Array Int (Array Int Int)))) (and (= |v_#memory_int_91| (store |v_#memory_int_90| |v_ULTIMATE.start_create_~now~0#1.base_40| (store (select |v_#memory_int_90| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|) (select (select |v_#memory_int_91| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))))) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16) (select (select |#memory_$Pointer$.offset| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16))))) (<= (+ 16 |v_ULTIMATE.start_create_~now~0#1.offset_34|) (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_40|)) (= (select |#valid| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) 1) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_40|) 1) (<= 0 (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16) (select (select |#memory_$Pointer$.base| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16))))) (<= 0 (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16)) (= (store |v_#memory_int_91| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_int_91| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (select (select |v_#memory_int_92| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))))) |v_#memory_int_92|) (<= (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 24) (select |#length| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)))) (<= 0 (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (= (store |v_#memory_$Pointer$.base_114| |v_ULTIMATE.start_create_~now~0#1.base_40| (store (select |v_#memory_$Pointer$.base_114| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|) (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)))) |v_#memory_$Pointer$.base_115|) (= |v_#memory_$Pointer$.offset_115| (store |v_#memory_$Pointer$.offset_114| |v_ULTIMATE.start_create_~now~0#1.base_40| (store (select |v_#memory_$Pointer$.offset_114| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))))) (= |#memory_int| (store |v_#memory_int_92| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_int_92| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.base_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.base_22|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (+ (select (select (store |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) (store (select |v_#memory_$Pointer$.offset_115| (select (select |v_#memory_$Pointer$.base_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|))) (select (select |v_#memory_$Pointer$.offset_115| |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) |v_ULTIMATE.start_create_~data1~0#1.offset_21|)) |v_ULTIMATE.start_create_~now~0#1.base_40|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_34|)) 16))))))) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_loop_#in~x#1.base| |ULTIMATE.start_loop_~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (= |ULTIMATE.start_loop_~x#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (or (< |ULTIMATE.start_loop_~x#1.offset| 0) (< (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ |ULTIMATE.start_loop_~x#1.offset| 8))) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|))' at error location [2023-12-02 13:07:56,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:07:56,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:07:56,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-12-02 13:07:56,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694707232] [2023-12-02 13:07:56,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:07:56,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:07:56,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:07:56,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1246, Unknown=12, NotChecked=0, Total=1406 [2023-12-02 13:07:56,766 INFO L87 Difference]: Start difference. First operand 108 states and 123 transitions. Second operand has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:07:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:57,157 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2023-12-02 13:07:57,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:07:57,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 27 [2023-12-02 13:07:57,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:57,160 INFO L225 Difference]: With dead ends: 115 [2023-12-02 13:07:57,160 INFO L226 Difference]: Without dead ends: 115 [2023-12-02 13:07:57,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 37.0s TimeCoverageRelationStatistics Valid=168, Invalid=1380, Unknown=12, NotChecked=0, Total=1560 [2023-12-02 13:07:57,162 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:57,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 547 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:07:57,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-12-02 13:07:57,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2023-12-02 13:07:57,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.5063291139240507) internal successors, (119), 104 states have internal predecessors, (119), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2023-12-02 13:07:57,165 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 27 [2023-12-02 13:07:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:57,166 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2023-12-02 13:07:57,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:07:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2023-12-02 13:07:57,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 13:07:57,166 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:57,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:07:57,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 13:07:57,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 13:07:57,367 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:57,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 968834847, now seen corresponding path program 1 times [2023-12-02 13:07:57,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:57,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535337531] [2023-12-02 13:07:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:57,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:57,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:07:57,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:57,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535337531] [2023-12-02 13:07:57,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535337531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:07:57,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:07:57,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-12-02 13:07:57,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530834160] [2023-12-02 13:07:57,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:07:57,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 13:07:57,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:07:57,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 13:07:57,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2023-12-02 13:07:57,769 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:58,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:07:58,125 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2023-12-02 13:07:58,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 13:07:58,125 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2023-12-02 13:07:58,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:07:58,126 INFO L225 Difference]: With dead ends: 110 [2023-12-02 13:07:58,127 INFO L226 Difference]: Without dead ends: 110 [2023-12-02 13:07:58,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-12-02 13:07:58,128 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 26 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:07:58,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 380 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:07:58,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-02 13:07:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-12-02 13:07:58,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.4936708860759493) internal successors, (118), 104 states have internal predecessors, (118), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-02 13:07:58,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2023-12-02 13:07:58,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 27 [2023-12-02 13:07:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:07:58,132 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2023-12-02 13:07:58,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:07:58,132 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2023-12-02 13:07:58,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 13:07:58,132 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:07:58,132 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] [2023-12-02 13:07:58,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-12-02 13:07:58,133 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:07:58,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:07:58,133 INFO L85 PathProgramCache]: Analyzing trace with hash 391356535, now seen corresponding path program 1 times [2023-12-02 13:07:58,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:07:58,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83549090] [2023-12-02 13:07:58,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:58,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:07:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:07:58,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:07:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83549090] [2023-12-02 13:07:58,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83549090] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:07:58,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226040599] [2023-12-02 13:07:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:07:58,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:07:58,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:07:58,523 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:07:58,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 13:07:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:07:58,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 13:07:58,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:07:58,792 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:07:58,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:07:58,805 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 [2023-12-02 13:07:58,811 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:07:58,812 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 [2023-12-02 13:07:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:07:58,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:07:59,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226040599] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:07:59,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098671644] [2023-12-02 13:07:59,091 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 13:07:59,091 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:07:59,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:07:59,091 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:07:59,092 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:08:05,195 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:08:05,208 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:08:54,773 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6639#(and (<= (+ |ULTIMATE.start_loop_~x#1.offset| 8) (select |#length| |ULTIMATE.start_loop_~x#1.base|)) (= |ULTIMATE.start_loop_#t~mem14#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_loop_~x#1.base|) |ULTIMATE.start_loop_~x#1.offset|)) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (= |ULTIMATE.start_loop_#in~x#1.base| |ULTIMATE.start_loop_~x#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_loop_#in~x#1.base|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_45| Int) (|v_ULTIMATE.start_create_~now~0#1.offset_39| Int) (|v_ULTIMATE.start_create_~data1~0#1.base_24| Int) (|v_#memory_int_111| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_136| (Array Int (Array Int Int))) (|v_#memory_int_112| (Array Int (Array Int Int))) (|v_#memory_int_113| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_135| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~data1~0#1.offset_23| Int) (|v_#memory_$Pointer$.offset_135| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_136| (Array Int (Array Int Int)))) (and (<= (+ (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) 24) (select |#length| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))) (= (store |v_#memory_$Pointer$.offset_135| |v_ULTIMATE.start_create_~now~0#1.base_45| (store (select |v_#memory_$Pointer$.offset_135| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))) |v_#memory_$Pointer$.offset_136|) (= |#memory_$Pointer$.offset| (store (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |#memory_$Pointer$.offset| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))))))) (<= (+ 16 |v_ULTIMATE.start_create_~now~0#1.offset_39|) (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_45|)) (<= 0 (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))) (<= 0 (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (= |#memory_int| (store |v_#memory_int_113| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_int_113| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |#memory_int| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))))))) (= |#memory_$Pointer$.base| (store (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |#memory_$Pointer$.base| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (+ 16 (select (select (store |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.offset_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.offset_23|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))))))) (= (store |v_#memory_int_111| |v_ULTIMATE.start_create_~now~0#1.base_45| (store (select |v_#memory_int_111| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|) (select (select |v_#memory_int_112| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))) |v_#memory_int_112|) (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_45|) 1) (<= 0 (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (= (select |#valid| (select (select (store |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_$Pointer$.base_136| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) |v_ULTIMATE.start_create_~data1~0#1.base_24|)) |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) 1) (= (store |v_#memory_$Pointer$.base_135| |v_ULTIMATE.start_create_~now~0#1.base_45| (store (select |v_#memory_$Pointer$.base_135| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|) (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))) |v_#memory_$Pointer$.base_136|) (= |v_#memory_int_113| (store |v_#memory_int_112| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (store (select |v_#memory_int_112| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)) (select (select |v_#memory_int_113| (select (select |v_#memory_$Pointer$.base_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|))) (select (select |v_#memory_$Pointer$.offset_136| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_39|)))))))) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (<= (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ 23 |ULTIMATE.start_loop_~x#1.offset|)) (= (select |#valid| |ULTIMATE.start_loop_~x#1.base|) 1) (= |ULTIMATE.start_loop_~x#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (= |ULTIMATE.start_loop_#t~mem14#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_loop_~x#1.base|) |ULTIMATE.start_loop_~x#1.offset|)) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (<= 0 |ULTIMATE.start_loop_~x#1.offset|))' at error location [2023-12-02 13:08:54,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:08:54,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:08:54,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-12-02 13:08:54,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303133609] [2023-12-02 13:08:54,774 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:08:54,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 13:08:54,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:08:54,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 13:08:54,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1863, Unknown=10, NotChecked=88, Total=2162 [2023-12-02 13:08:54,776 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:08:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:08:55,257 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2023-12-02 13:08:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 13:08:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2023-12-02 13:08:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:08:55,258 INFO L225 Difference]: With dead ends: 136 [2023-12-02 13:08:55,258 INFO L226 Difference]: Without dead ends: 136 [2023-12-02 13:08:55,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=231, Invalid=2115, Unknown=10, NotChecked=94, Total=2450 [2023-12-02 13:08:55,260 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 41 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:08:55,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 415 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 463 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2023-12-02 13:08:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-12-02 13:08:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2023-12-02 13:08:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.5108695652173914) internal successors, (139), 117 states have internal predecessors, (139), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:08:55,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2023-12-02 13:08:55,265 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 28 [2023-12-02 13:08:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:08:55,265 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2023-12-02 13:08:55,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 20 states have internal predecessors, (46), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:08:55,265 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2023-12-02 13:08:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:08:55,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:08:55,266 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:08:55,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 13:08:55,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:08:55,467 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:08:55,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:08:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash -704129356, now seen corresponding path program 1 times [2023-12-02 13:08:55,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:08:55,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662279167] [2023-12-02 13:08:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:08:55,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:08:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:08:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:08:55,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:08:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662279167] [2023-12-02 13:08:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662279167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:08:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040426803] [2023-12-02 13:08:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:08:55,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:08:55,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:08:55,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:08:55,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 13:08:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:08:56,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:08:56,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:08:56,113 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:08:56,114 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 [2023-12-02 13:08:56,140 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 1 [2023-12-02 13:08:56,200 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:08:56,201 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 42 treesize of output 41 [2023-12-02 13:08:56,242 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:08:56,243 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 42 treesize of output 41 [2023-12-02 13:08:56,253 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 31 treesize of output 13 [2023-12-02 13:08:56,305 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_~pi~0.base (select |c_#valid| alloc_and_zero_~pi~0.base))))) is different from true [2023-12-02 13:08:56,335 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 13:08:56,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2023-12-02 13:08:56,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 13:08:56,341 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:08:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040426803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:08:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13715506] [2023-12-02 13:08:56,389 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:08:56,389 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:08:56,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:08:56,390 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:08:56,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:09:02,297 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:09:02,317 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:09:27,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7037#(not (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1))' at error location [2023-12-02 13:09:27,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:09:27,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:09:27,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-12-02 13:09:27,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322936378] [2023-12-02 13:09:27,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:09:27,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 13:09:27,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:09:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 13:09:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1244, Unknown=7, NotChecked=72, Total=1482 [2023-12-02 13:09:27,231 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 21 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:09:27,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:09:27,563 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2023-12-02 13:09:27,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:09:27,563 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 29 [2023-12-02 13:09:27,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:09:27,564 INFO L225 Difference]: With dead ends: 122 [2023-12-02 13:09:27,564 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 13:09:27,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=168, Invalid=1311, Unknown=7, NotChecked=74, Total=1560 [2023-12-02 13:09:27,566 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:09:27,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 451 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 444 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2023-12-02 13:09:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 13:09:27,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-12-02 13:09:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 92 states have (on average 1.4673913043478262) internal successors, (135), 115 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:09:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2023-12-02 13:09:27,570 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 29 [2023-12-02 13:09:27,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:09:27,570 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2023-12-02 13:09:27,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 2.0) internal successors, (34), 18 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:09:27,570 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2023-12-02 13:09:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:09:27,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:09:27,571 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:09:27,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 13:09:27,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:09:27,772 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:09:27,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:09:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -704129355, now seen corresponding path program 1 times [2023-12-02 13:09:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:09:27,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656047214] [2023-12-02 13:09:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:09:27,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:09:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:09:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:09:28,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:09:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656047214] [2023-12-02 13:09:28,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656047214] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:09:28,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95817276] [2023-12-02 13:09:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:09:28,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:09:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:09:28,387 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:09:28,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 13:09:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:09:28,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-02 13:09:28,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:09:28,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 13:09:28,698 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:09:28,698 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 [2023-12-02 13:09:28,744 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 13:09:28,751 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 1 [2023-12-02 13:09:28,892 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:09:28,892 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 73 treesize of output 66 [2023-12-02 13:09:28,897 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 30 treesize of output 13 [2023-12-02 13:09:29,039 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:09:29,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2023-12-02 13:09:29,050 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 30 treesize of output 13 [2023-12-02 13:09:29,064 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 42 treesize of output 18 [2023-12-02 13:09:29,070 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 9 treesize of output 3 [2023-12-02 13:09:29,155 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_~pi~0.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_~pi~0.base) 0) (= (store |c_old(#length)| alloc_and_zero_~pi~0.base (select |c_#length| alloc_and_zero_~pi~0.base)) |c_#length|))) is different from true [2023-12-02 13:09:29,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:09:29,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2023-12-02 13:09:29,185 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 13:09:29,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 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 [2023-12-02 13:09:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 13:09:29,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:09:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95817276] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:09:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [888161909] [2023-12-02 13:09:29,317 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:09:29,317 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:09:29,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:09:29,317 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:09:29,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:09:35,186 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:09:35,199 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:10:00,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7418#(or (< (+ |ULTIMATE.start_create_~now~0#1.offset| 8) 0) (< (select |#length| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 16)))' at error location [2023-12-02 13:10:00,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:10:00,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:10:00,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 24 [2023-12-02 13:10:00,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893024324] [2023-12-02 13:10:00,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:10:00,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 13:10:00,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:00,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 13:10:00,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=4, NotChecked=82, Total=1892 [2023-12-02 13:10:00,897 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:10:01,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:01,849 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2023-12-02 13:10:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 13:10:01,850 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-12-02 13:10:01,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:01,851 INFO L225 Difference]: With dead ends: 118 [2023-12-02 13:10:01,851 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 13:10:01,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=270, Invalid=2276, Unknown=8, NotChecked=98, Total=2652 [2023-12-02 13:10:01,853 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:01,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 338 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 586 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2023-12-02 13:10:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 13:10:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-12-02 13:10:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 111 states have internal predecessors, (127), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:10:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 135 transitions. [2023-12-02 13:10:01,857 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 135 transitions. Word has length 29 [2023-12-02 13:10:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:01,858 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 135 transitions. [2023-12-02 13:10:01,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 13:10:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 135 transitions. [2023-12-02 13:10:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 13:10:01,859 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:01,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:10:01,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 13:10:02,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:02,059 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:10:02,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:02,060 INFO L85 PathProgramCache]: Analyzing trace with hash -957610430, now seen corresponding path program 1 times [2023-12-02 13:10:02,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:02,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888043554] [2023-12-02 13:10:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:02,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:10:02,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:02,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888043554] [2023-12-02 13:10:02,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888043554] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:10:02,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:10:02,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-12-02 13:10:02,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381461723] [2023-12-02 13:10:02,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:10:02,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 13:10:02,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:02,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 13:10:02,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-12-02 13:10:02,436 INFO L87 Difference]: Start difference. First operand 118 states and 135 transitions. Second operand has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:10:02,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:02,855 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2023-12-02 13:10:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:10:02,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-12-02 13:10:02,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:02,857 INFO L225 Difference]: With dead ends: 132 [2023-12-02 13:10:02,857 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 13:10:02,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-12-02 13:10:02,858 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:02,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 262 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 13:10:02,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 13:10:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 118. [2023-12-02 13:10:02,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 111 states have internal predecessors, (126), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:10:02,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 134 transitions. [2023-12-02 13:10:02,863 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 134 transitions. Word has length 29 [2023-12-02 13:10:02,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:02,864 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 134 transitions. [2023-12-02 13:10:02,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:10:02,864 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 134 transitions. [2023-12-02 13:10:02,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 13:10:02,865 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:02,865 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] [2023-12-02 13:10:02,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-12-02 13:10:02,865 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:10:02,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:02,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1931257156, now seen corresponding path program 1 times [2023-12-02 13:10:02,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:02,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386186790] [2023-12-02 13:10:02,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:02,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:02,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:03,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:10:03,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386186790] [2023-12-02 13:10:03,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386186790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30468910] [2023-12-02 13:10:03,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:03,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:03,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:03,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:03,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 13:10:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:03,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 54 conjunts are in the unsatisfiable core [2023-12-02 13:10:03,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:04,199 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:10:04,199 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 [2023-12-02 13:10:04,269 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 1 [2023-12-02 13:10:04,409 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:10:04,409 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 42 treesize of output 41 [2023-12-02 13:10:04,487 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:10:04,488 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 42 treesize of output 41 [2023-12-02 13:10:04,674 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:10:04,675 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-12-02 13:10:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:10:04,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:10:04,775 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1774 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1774) |c_ULTIMATE.start_create_~sll~0#1.base|) (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) 1)) is different from false [2023-12-02 13:10:04,781 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1774 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|)) v_ArrVal_1774) |c_ULTIMATE.start_create_~sll~0#1.base|) (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) 1)) is different from false [2023-12-02 13:10:04,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:04,989 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 46 treesize of output 37 [2023-12-02 13:10:04,998 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:04,998 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 170 treesize of output 145 [2023-12-02 13:10:05,006 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 94 treesize of output 86 [2023-12-02 13:10:05,015 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:05,016 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 86 treesize of output 74 [2023-12-02 13:10:07,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30468910] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:07,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1848920741] [2023-12-02 13:10:07,545 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:10:07,545 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:10:07,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:10:07,545 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:10:07,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:10:14,215 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:10:14,230 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:10:36,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8142#(and (not (= (select |#valid| |ULTIMATE.start_loop_~x#1.base|) 1)) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))))' at error location [2023-12-02 13:10:36,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:10:36,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:10:36,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2023-12-02 13:10:36,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487988371] [2023-12-02 13:10:36,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:10:36,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:10:36,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:10:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:10:36,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=3026, Unknown=38, NotChecked=226, Total=3540 [2023-12-02 13:10:36,622 INFO L87 Difference]: Start difference. First operand 118 states and 134 transitions. Second operand has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:10:37,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:10:37,339 INFO L93 Difference]: Finished difference Result 126 states and 143 transitions. [2023-12-02 13:10:37,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:10:37,339 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2023-12-02 13:10:37,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:10:37,340 INFO L225 Difference]: With dead ends: 126 [2023-12-02 13:10:37,340 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 13:10:37,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=286, Invalid=3344, Unknown=38, NotChecked=238, Total=3906 [2023-12-02 13:10:37,342 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 23 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:10:37,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 560 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:10:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 13:10:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-12-02 13:10:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.3829787234042554) internal successors, (130), 113 states have internal predecessors, (130), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:10:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 138 transitions. [2023-12-02 13:10:37,347 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 138 transitions. Word has length 31 [2023-12-02 13:10:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:10:37,347 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 138 transitions. [2023-12-02 13:10:37,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:10:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 138 transitions. [2023-12-02 13:10:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 13:10:37,348 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:10:37,348 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] [2023-12-02 13:10:37,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 13:10:37,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-12-02 13:10:37,549 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:10:37,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:10:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1931257155, now seen corresponding path program 1 times [2023-12-02 13:10:37,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:10:37,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675031374] [2023-12-02 13:10:37,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:37,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:10:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:38,508 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:10:38,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:10:38,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675031374] [2023-12-02 13:10:38,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675031374] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:38,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583147051] [2023-12-02 13:10:38,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:10:38,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:10:38,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:10:38,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:10:38,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 13:10:38,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:10:38,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 67 conjunts are in the unsatisfiable core [2023-12-02 13:10:38,665 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:10:38,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 13:10:38,834 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:10:38,834 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 [2023-12-02 13:10:38,870 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 [2023-12-02 13:10:38,881 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 [2023-12-02 13:10:38,985 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:10:38,985 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 [2023-12-02 13:10:38,993 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 [2023-12-02 13:10:39,054 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:10:39,055 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 [2023-12-02 13:10:39,062 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 [2023-12-02 13:10:39,175 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 [2023-12-02 13:10:39,178 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 [2023-12-02 13:10:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:10:39,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:10:39,341 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1908 (Array Int Int)) (v_ArrVal_1907 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1908) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)))) (forall ((v_ArrVal_1907 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem12#1.base| v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0))))) is different from false [2023-12-02 13:10:39,352 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|))) (.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1907 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1))) (forall ((v_ArrVal_1908 (Array Int Int)) (v_ArrVal_1907 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1908) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)))))) is different from false [2023-12-02 13:10:39,365 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1908 (Array Int Int)) (v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1906 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1905))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) .cse3))) (<= (+ 8 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1906) .cse0 v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)) (select |c_#length| (select (select (store .cse2 .cse0 v_ArrVal_1908) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)))))) (forall ((v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1906 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1906) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem11#1.base| v_ArrVal_1905) |c_ULTIMATE.start_create_~now~0#1.base|) .cse3) v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1))))) is different from false [2023-12-02 13:10:39,380 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) .cse4)) (.cse2 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1908 (Array Int Int)) (v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1906 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1905))) (let ((.cse1 (select (select .cse3 |c_ULTIMATE.start_create_~now~0#1.base|) .cse4))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1906) .cse1 v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2) 8) (select |c_#length| (select (select (store .cse3 .cse1 v_ArrVal_1908) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2)))))) (forall ((v_ArrVal_1907 (Array Int Int)) (v_ArrVal_1906 (Array Int Int)) (v_ArrVal_1905 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1906) (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1905) |c_ULTIMATE.start_create_~now~0#1.base|) .cse4) v_ArrVal_1907) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse2)))))) is different from false [2023-12-02 13:10:39,390 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,391 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 89 treesize of output 90 [2023-12-02 13:10:39,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,398 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 79 treesize of output 60 [2023-12-02 13:10:39,412 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,412 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 400 treesize of output 345 [2023-12-02 13:10:39,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,440 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 1008 treesize of output 953 [2023-12-02 13:10:39,456 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 218 treesize of output 202 [2023-12-02 13:10:39,468 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,469 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 202 treesize of output 174 [2023-12-02 13:10:39,477 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 166 treesize of output 150 [2023-12-02 13:10:39,486 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 78 treesize of output 70 [2023-12-02 13:10:39,631 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,631 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 44 treesize of output 45 [2023-12-02 13:10:39,640 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:10:39,640 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 36 treesize of output 37 [2023-12-02 13:10:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:10:39,647 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 34 treesize of output 22 [2023-12-02 13:10:39,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:10:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:10:39,654 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 22 treesize of output 10 [2023-12-02 13:10:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583147051] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:10:39,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [194862645] [2023-12-02 13:10:39,826 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 13:10:39,827 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:10:39,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:10:39,827 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:10:39,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:10:46,233 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:10:46,247 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:11:13,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8592#(and (or (< |ULTIMATE.start_loop_~x#1.offset| 0) (< (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ |ULTIMATE.start_loop_~x#1.offset| 8))) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))))' at error location [2023-12-02 13:11:13,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:11:13,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:11:13,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2023-12-02 13:11:13,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638283035] [2023-12-02 13:11:13,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:11:13,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 13:11:13,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:13,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 13:11:13,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2964, Unknown=10, NotChecked=452, Total=3660 [2023-12-02 13:11:13,681 INFO L87 Difference]: Start difference. First operand 120 states and 138 transitions. Second operand has 31 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:11:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:14,351 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2023-12-02 13:11:14,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 13:11:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2023-12-02 13:11:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:14,352 INFO L225 Difference]: With dead ends: 122 [2023-12-02 13:11:14,352 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 13:11:14,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=310, Invalid=3728, Unknown=10, NotChecked=508, Total=4556 [2023-12-02 13:11:14,354 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 13 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:14,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 573 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 13:11:14,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 13:11:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2023-12-02 13:11:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 115 states have internal predecessors, (131), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:11:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2023-12-02 13:11:14,357 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 31 [2023-12-02 13:11:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:14,357 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2023-12-02 13:11:14,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:11:14,357 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2023-12-02 13:11:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 13:11:14,358 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:14,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:11:14,363 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 13:11:14,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:14,559 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:11:14,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:14,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1140594757, now seen corresponding path program 1 times [2023-12-02 13:11:14,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:14,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000278567] [2023-12-02 13:11:14,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:14,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:11:14,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:14,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000278567] [2023-12-02 13:11:14,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000278567] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:11:14,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 13:11:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 13:11:14,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205457518] [2023-12-02 13:11:14,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:11:14,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 13:11:14,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:11:14,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 13:11:14,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 13:11:14,650 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:11:14,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:11:14,802 INFO L93 Difference]: Finished difference Result 128 states and 145 transitions. [2023-12-02 13:11:14,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 13:11:14,802 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-12-02 13:11:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:11:14,803 INFO L225 Difference]: With dead ends: 128 [2023-12-02 13:11:14,803 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 13:11:14,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 13:11:14,804 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 62 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 13:11:14,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 167 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 13:11:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 13:11:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 125. [2023-12-02 13:11:14,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 99 states have (on average 1.3838383838383839) internal successors, (137), 118 states have internal predecessors, (137), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:11:14,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2023-12-02 13:11:14,807 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 31 [2023-12-02 13:11:14,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:11:14,807 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2023-12-02 13:11:14,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:11:14,807 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2023-12-02 13:11:14,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 13:11:14,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:11:14,808 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] [2023-12-02 13:11:14,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 13:11:14,808 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:11:14,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:11:14,808 INFO L85 PathProgramCache]: Analyzing trace with hash 260657451, now seen corresponding path program 1 times [2023-12-02 13:11:14,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:11:14,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524618089] [2023-12-02 13:11:14,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:14,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:11:14,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 13:11:15,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:11:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524618089] [2023-12-02 13:11:15,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524618089] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:11:15,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595222155] [2023-12-02 13:11:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:11:15,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:11:15,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:11:15,009 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:11:15,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 13:11:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:11:15,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 13:11:15,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:11:15,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:11:15,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:11:15,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:11:15,328 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 19 treesize of output 23 [2023-12-02 13:11:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 13:11:15,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595222155] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:11:15,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1763612671] [2023-12-02 13:11:15,417 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 13:11:15,417 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:11:15,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:11:15,417 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:11:15,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:11:23,708 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:11:23,721 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:11:46,415 WARN L293 SmtUtils]: Spent 6.95s on a formula simplification. DAG size of input: 323 DAG size of output: 299 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:12:06,383 WARN L293 SmtUtils]: Spent 9.22s on a formula simplification. DAG size of input: 329 DAG size of output: 304 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:12:33,369 WARN L293 SmtUtils]: Spent 13.05s on a formula simplification. DAG size of input: 350 DAG size of output: 324 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:12:39,071 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9340#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (or (< |ULTIMATE.start_destroy_~l#1.offset| 0) (< (select |#length| |ULTIMATE.start_destroy_~l#1.base|) (+ |ULTIMATE.start_destroy_~l#1.offset| 8))) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|))' at error location [2023-12-02 13:12:39,072 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:12:39,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:12:39,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 17 [2023-12-02 13:12:39,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444185695] [2023-12-02 13:12:39,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 13:12:39,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 13:12:39,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:12:39,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 13:12:39,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1348, Unknown=22, NotChecked=0, Total=1482 [2023-12-02 13:12:39,074 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 18 states, 16 states have (on average 3.5625) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:12:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:12:39,386 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2023-12-02 13:12:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:12:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5625) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 13:12:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:12:39,387 INFO L225 Difference]: With dead ends: 134 [2023-12-02 13:12:39,387 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 13:12:39,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 75.6s TimeCoverageRelationStatistics Valid=134, Invalid=1566, Unknown=22, NotChecked=0, Total=1722 [2023-12-02 13:12:39,388 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 155 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 13:12:39,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 255 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 13:12:39,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 13:12:39,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 124. [2023-12-02 13:12:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 100 states have (on average 1.36) internal successors, (136), 117 states have internal predecessors, (136), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:12:39,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2023-12-02 13:12:39,391 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 32 [2023-12-02 13:12:39,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:12:39,391 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2023-12-02 13:12:39,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5625) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 13:12:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2023-12-02 13:12:39,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 13:12:39,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:12:39,392 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:12:39,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 13:12:39,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:39,593 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:12:39,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:12:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1382166459, now seen corresponding path program 1 times [2023-12-02 13:12:39,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:12:39,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70971602] [2023-12-02 13:12:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:39,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:12:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:40,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 13:12:40,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:12:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70971602] [2023-12-02 13:12:40,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70971602] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:40,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229188916] [2023-12-02 13:12:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:12:40,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:12:40,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:12:40,213 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:12:40,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 13:12:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:12:40,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 13:12:40,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:12:40,471 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 13:12:40,471 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 [2023-12-02 13:12:40,509 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 1 [2023-12-02 13:12:40,590 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:12:40,590 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 42 treesize of output 41 [2023-12-02 13:12:40,646 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:12:40,646 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 42 treesize of output 41 [2023-12-02 13:12:40,654 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 31 treesize of output 13 [2023-12-02 13:12:40,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 13:12:40,788 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 13:12:40,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 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 [2023-12-02 13:12:40,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 13:12:40,825 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 1 [2023-12-02 13:12:40,911 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:12:40,912 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 62 treesize of output 57 [2023-12-02 13:12:40,918 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 30 treesize of output 13 [2023-12-02 13:12:40,953 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 31 treesize of output 13 [2023-12-02 13:12:40,957 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 9 treesize of output 3 [2023-12-02 13:12:40,981 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:12:40,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:12:41,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:12:41,189 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 70 treesize of output 61 [2023-12-02 13:12:41,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:12:41,198 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 50 treesize of output 51 [2023-12-02 13:12:41,202 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 78 treesize of output 66 [2023-12-02 13:12:41,206 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 136 treesize of output 106 [2023-12-02 13:12:41,211 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 47 treesize of output 43 [2023-12-02 13:12:41,215 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 43 treesize of output 39 [2023-12-02 13:12:41,219 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 39 treesize of output 35 [2023-12-02 13:12:41,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:12:41,933 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 47 treesize of output 38 [2023-12-02 13:12:41,936 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 303 treesize of output 249 [2023-12-02 13:12:41,943 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 38 treesize of output 30 [2023-12-02 13:12:41,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2023-12-02 13:12:41,958 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 8 treesize of output 4 [2023-12-02 13:12:42,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229188916] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:12:42,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922112013] [2023-12-02 13:12:42,134 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 13:12:42,134 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:12:42,135 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:12:42,135 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:12:42,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:12:47,879 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:12:47,892 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:13:22,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9823#(and (exists ((|v_#memory_int_239| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_281| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_280| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_271| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_272| (Array Int (Array Int Int))) (|v_#memory_int_240| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_281| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) (store (select |v_#memory_$Pointer$.base_281| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) |ULTIMATE.start_create_~data1~0#1.base|)) |#memory_$Pointer$.base|) (= (store |v_#memory_$Pointer$.base_280| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_280| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8) (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))) |v_#memory_$Pointer$.base_281|) (= (store |v_#memory_$Pointer$.offset_271| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_271| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8) (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))) |v_#memory_$Pointer$.offset_272|) (= |#memory_int| (store |v_#memory_int_240| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) (store (select |v_#memory_int_240| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) (select (select |#memory_int| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_272| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) (store (select |v_#memory_$Pointer$.offset_272| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) |ULTIMATE.start_create_~data1~0#1.offset|))) (<= (+ (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) 8) (select |#length| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))) (= (store |v_#memory_int_239| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_239| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8) (select (select |v_#memory_int_240| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))) |v_#memory_int_240|) (= (select |#valid| (select (select |v_#memory_$Pointer$.base_281| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))) 1) (<= 0 (select (select |v_#memory_$Pointer$.offset_272| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8))))) (or (< (+ 16 |ULTIMATE.start_create_#t~mem12#1.offset|) 0) (< (select |#length| |ULTIMATE.start_create_#t~mem12#1.base|) (+ |ULTIMATE.start_create_#t~mem12#1.offset| 24))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) |ULTIMATE.start_create_#t~mem12#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_~now~0#1.base|) (+ |ULTIMATE.start_create_~now~0#1.offset| 8)) |ULTIMATE.start_create_#t~mem12#1.base|) (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1) (<= (+ |ULTIMATE.start_create_~now~0#1.offset| 16) (select |#length| |ULTIMATE.start_create_~now~0#1.base|)) (<= 0 (+ |ULTIMATE.start_create_~now~0#1.offset| 8)))' at error location [2023-12-02 13:13:22,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:13:22,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:13:22,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-12-02 13:13:22,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383583218] [2023-12-02 13:13:22,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:13:22,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:13:22,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:13:22,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:13:22,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=3974, Unknown=24, NotChecked=0, Total=4290 [2023-12-02 13:13:22,108 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand has 32 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:13:22,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:13:22,983 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2023-12-02 13:13:22,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 13:13:22,984 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-12-02 13:13:22,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:13:22,985 INFO L225 Difference]: With dead ends: 123 [2023-12-02 13:13:22,985 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 13:13:22,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=397, Invalid=4691, Unknown=24, NotChecked=0, Total=5112 [2023-12-02 13:13:22,988 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 673 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:13:22,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 673 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:13:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 13:13:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2023-12-02 13:13:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 100 states have (on average 1.34) internal successors, (134), 116 states have internal predecessors, (134), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:13:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2023-12-02 13:13:22,992 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 33 [2023-12-02 13:13:22,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:13:22,993 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2023-12-02 13:13:22,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 27 states have internal predecessors, (42), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 13:13:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2023-12-02 13:13:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 13:13:22,993 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:13:22,993 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] [2023-12-02 13:13:22,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 13:13:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:23,194 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:13:23,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:13:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash -509553577, now seen corresponding path program 1 times [2023-12-02 13:13:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:13:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184731804] [2023-12-02 13:13:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:13:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:13:23,815 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:13:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184731804] [2023-12-02 13:13:23,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184731804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:13:23,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963071105] [2023-12-02 13:13:23,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:13:23,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:13:23,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:13:23,816 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:13:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 13:13:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:13:23,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-02 13:13:24,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:13:24,125 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 [2023-12-02 13:13:24,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:13:24,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 13:13:24,307 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:13:24,307 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 [2023-12-02 13:13:24,314 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 25 treesize of output 18 [2023-12-02 13:13:24,376 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 1 [2023-12-02 13:13:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:13:24,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:13:24,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2023-12-02 13:13:24,513 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:13:24,513 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 51 treesize of output 48 [2023-12-02 13:13:24,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 18 [2023-12-02 13:13:24,533 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 [2023-12-02 13:13:24,572 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 23 treesize of output 16 [2023-12-02 13:13:24,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:13:24,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:13:25,183 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:13:25,183 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 42 treesize of output 43 [2023-12-02 13:13:25,186 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 76 treesize of output 64 [2023-12-02 13:13:25,190 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 31 treesize of output 27 [2023-12-02 13:13:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963071105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:13:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1727615006] [2023-12-02 13:13:25,586 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 13:13:25,586 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:13:25,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:13:25,586 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:13:25,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:13:34,161 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:13:34,176 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:13:58,691 WARN L293 SmtUtils]: Spent 5.90s on a formula simplification. DAG size of input: 295 DAG size of output: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:14:13,480 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 301 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:14:35,860 WARN L293 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 322 DAG size of output: 305 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:14:41,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10292#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_destroy_#t~mem17#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)) (<= 0 |ULTIMATE.start_destroy_~l#1.offset|) (not (= |ULTIMATE.start_destroy_#t~mem17#1.offset| 0)) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|) (<= (+ |ULTIMATE.start_destroy_~l#1.offset| 8) (select |#length| |ULTIMATE.start_destroy_~l#1.base|)) (= |ULTIMATE.start_destroy_#t~mem17#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)))' at error location [2023-12-02 13:14:41,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:14:41,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:14:41,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 32 [2023-12-02 13:14:41,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408738452] [2023-12-02 13:14:41,286 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:14:41,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 13:14:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:14:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 13:14:41,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=3876, Unknown=33, NotChecked=0, Total=4160 [2023-12-02 13:14:41,289 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 33 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:14:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:14:42,503 INFO L93 Difference]: Finished difference Result 160 states and 175 transitions. [2023-12-02 13:14:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 13:14:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-12-02 13:14:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:14:42,504 INFO L225 Difference]: With dead ends: 160 [2023-12-02 13:14:42,504 INFO L226 Difference]: Without dead ends: 160 [2023-12-02 13:14:42,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 69.1s TimeCoverageRelationStatistics Valid=388, Invalid=5126, Unknown=36, NotChecked=0, Total=5550 [2023-12-02 13:14:42,506 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 148 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 13:14:42,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 487 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 13:14:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-02 13:14:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2023-12-02 13:14:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 117 states have internal predecessors, (135), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:14:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2023-12-02 13:14:42,509 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 33 [2023-12-02 13:14:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:14:42,510 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2023-12-02 13:14:42,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:14:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2023-12-02 13:14:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 13:14:42,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:14:42,510 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] [2023-12-02 13:14:42,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 13:14:42,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 13:14:42,711 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:14:42,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:14:42,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1383708426, now seen corresponding path program 1 times [2023-12-02 13:14:42,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:14:42,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642560254] [2023-12-02 13:14:42,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:14:42,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:14:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:14:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:14:43,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:14:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642560254] [2023-12-02 13:14:43,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642560254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:14:43,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209369788] [2023-12-02 13:14:43,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:14:43,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:14:43,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:14:43,338 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:14:43,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 13:14:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:14:43,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 70 conjunts are in the unsatisfiable core [2023-12-02 13:14:43,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:14:43,662 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 [2023-12-02 13:14:43,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:14:43,730 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 13 [2023-12-02 13:14:43,771 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 9 treesize of output 5 [2023-12-02 13:14:43,829 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 13:14:43,829 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 18 treesize of output 17 [2023-12-02 13:14:43,833 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 7 treesize of output 5 [2023-12-02 13:14:43,850 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 13:14:43,850 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 [2023-12-02 13:14:43,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:14:43,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-12-02 13:14:44,050 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 13:14:44,050 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 40 treesize of output 39 [2023-12-02 13:14:44,120 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 13:14:44,120 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 [2023-12-02 13:14:44,331 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:14:44,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-12-02 13:14:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:14:44,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:14:44,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209369788] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:14:44,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1366889522] [2023-12-02 13:14:44,953 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2023-12-02 13:14:44,953 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:14:44,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:14:44,954 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:14:44,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:14:53,215 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 24 for LOIs [2023-12-02 13:14:53,227 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:15:17,061 WARN L293 SmtUtils]: Spent 5.91s on a formula simplification. DAG size of input: 295 DAG size of output: 280 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:15:33,319 WARN L293 SmtUtils]: Spent 6.84s on a formula simplification. DAG size of input: 301 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:15:55,220 WARN L293 SmtUtils]: Spent 10.11s on a formula simplification. DAG size of input: 322 DAG size of output: 305 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 13:16:00,581 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10816#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (<= 0 |ULTIMATE.start_destroy_~l#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|) 0) (= |ULTIMATE.start_destroy_#t~mem17#1.offset| 0) (<= |#StackHeapBarrier| |ULTIMATE.start_destroy_#t~mem17#1.base|) (= (select |#valid| |ULTIMATE.start_destroy_~l#1.base|) 1) (= |ULTIMATE.start_destroy_#in~l#1.base| |ULTIMATE.start_destroy_~l#1.base|) (<= (+ |ULTIMATE.start_destroy_~l#1.offset| 8) (select |#length| |ULTIMATE.start_destroy_~l#1.base|)) (= |ULTIMATE.start_destroy_#t~mem17#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)))' at error location [2023-12-02 13:16:00,582 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:16:00,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:16:00,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2023-12-02 13:16:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622769489] [2023-12-02 13:16:00,582 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:16:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 13:16:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:16:00,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 13:16:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=3880, Unknown=26, NotChecked=0, Total=4160 [2023-12-02 13:16:00,584 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 32 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:16:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:16:02,280 INFO L93 Difference]: Finished difference Result 170 states and 185 transitions. [2023-12-02 13:16:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 13:16:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2023-12-02 13:16:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:16:02,282 INFO L225 Difference]: With dead ends: 170 [2023-12-02 13:16:02,282 INFO L226 Difference]: Without dead ends: 170 [2023-12-02 13:16:02,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 69.3s TimeCoverageRelationStatistics Valid=388, Invalid=5284, Unknown=28, NotChecked=0, Total=5700 [2023-12-02 13:16:02,283 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 135 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 13:16:02,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 624 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 13:16:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-12-02 13:16:02,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2023-12-02 13:16:02,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.3333333333333333) internal successors, (136), 118 states have internal predecessors, (136), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:16:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2023-12-02 13:16:02,286 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 34 [2023-12-02 13:16:02,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:16:02,286 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2023-12-02 13:16:02,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 13:16:02,287 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2023-12-02 13:16:02,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 13:16:02,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:16:02,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 13:16:02,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 13:16:02,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 13:16:02,488 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:16:02,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:16:02,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1971966352, now seen corresponding path program 1 times [2023-12-02 13:16:02,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:16:02,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427450210] [2023-12-02 13:16:02,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:02,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:16:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 13:16:03,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:16:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427450210] [2023-12-02 13:16:03,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427450210] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:03,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969145237] [2023-12-02 13:16:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:16:03,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:16:03,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:16:03,610 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:16:03,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 13:16:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:16:03,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 79 conjunts are in the unsatisfiable core [2023-12-02 13:16:03,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:16:04,055 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 [2023-12-02 13:16:04,128 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 73 treesize of output 53 [2023-12-02 13:16:04,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 13:16:04,619 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:16:04,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 64 [2023-12-02 13:16:13,305 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_~l#1.base_33| Int) (v_arrayElimCell_125 Int) (|v_ULTIMATE.start_destroy_#t~mem18#1.base_16| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_33| 1))) (and (= |c_#valid| (store (store (store |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_125 0) |v_ULTIMATE.start_destroy_#t~mem18#1.base_16| 0) |v_ULTIMATE.start_destroy_~l#1.base_33| 0)) (= (select .cse0 v_arrayElimCell_125) 0) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_33|) 0) (= (select (store .cse0 v_arrayElimCell_125 1) |v_ULTIMATE.start_destroy_#t~mem18#1.base_16|) 0)))) is different from true [2023-12-02 13:16:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-12-02 13:16:13,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:16:14,694 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:16:14,701 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:16:14,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 518 treesize of output 470 [2023-12-02 13:16:21,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969145237] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:16:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [416875230] [2023-12-02 13:16:21,126 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 13:16:21,126 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:16:21,126 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:16:21,126 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:16:21,126 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:16:22,319 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:16:22,332 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:18:41,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11392#(and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_create_#res#1.offset| 0) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) 0)) (<= (+ (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 0) 1) |#StackHeapBarrier|) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (<= (+ (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (exists ((|v_#memory_$Pointer$.offset_337| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_339| (Array Int (Array Int Int))) (|v_#memory_int_301| (Array Int (Array Int Int))) (|v_#valid_254| (Array Int Int)) (|v_#length_215| (Array Int Int)) (|v_#memory_$Pointer$.base_350| (Array Int (Array Int Int))) (|v_#memory_int_297| (Array Int (Array Int Int))) (|v_#memory_int_298| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_~data1~0#1.base_37| Int) (|v_#memory_int_299| (Array Int (Array Int Int))) (|v_#memory_int_300| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_340| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_353| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_352| (Array Int (Array Int Int)))) (and (= (select |v_#valid_254| |ULTIMATE.start_create_#res#1.base|) 0) (= (store |v_#memory_int_297| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_297| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |v_#memory_int_298| |ULTIMATE.start_create_#res#1.base|) 8))) |v_#memory_int_298|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_353| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.base_353| |ULTIMATE.start_create_#res#1.base|) 0 |v_ULTIMATE.start_create_~data1~0#1.base_37|) 16 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)))) (= |v_#memory_$Pointer$.offset_340| (store |v_#memory_$Pointer$.offset_339| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) (store (select |v_#memory_$Pointer$.offset_339| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0 (select (select |v_#memory_$Pointer$.offset_340| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0)))) (= (store |v_#memory_int_300| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_300| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |v_#memory_int_301| |ULTIMATE.start_create_#res#1.base|) 0))) |v_#memory_int_301|) (not (= |v_ULTIMATE.start_create_~data1~0#1.base_37| 0)) (<= (select (select |v_#memory_int_299| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0) 2147483647) (= (store |v_#memory_int_301| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_301| |ULTIMATE.start_create_#res#1.base|) 16 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 16))) |#memory_int|) (= (select (store |v_#valid_254| |ULTIMATE.start_create_#res#1.base| 1) |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_340| |ULTIMATE.start_create_#res#1.base| (store (store (select |v_#memory_$Pointer$.offset_340| |ULTIMATE.start_create_#res#1.base|) 0 0) 16 0))) (= (store |v_#memory_int_298| |v_ULTIMATE.start_create_~data1~0#1.base_37| (store (select |v_#memory_int_298| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0 (select (select |v_#memory_int_299| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0))) |v_#memory_int_299|) (<= (select (select |v_#memory_int_300| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0) 2147483647) (<= 0 (+ (select (select |v_#memory_int_299| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0) 2147483648)) (= (select (store (store |v_#valid_254| |ULTIMATE.start_create_#res#1.base| 1) |v_ULTIMATE.start_create_~data1~0#1.base_37| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0) (= (store (store (store (store (store (store |v_#valid_254| |ULTIMATE.start_create_#res#1.base| 1) |v_ULTIMATE.start_create_~data1~0#1.base_37| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 0) 0) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 16) 0) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|) (= |v_#memory_int_300| (store |v_#memory_int_299| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) (store (select |v_#memory_int_299| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0 (select (select |v_#memory_int_300| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0)))) (= |#length| (store (store (store |v_#length_215| |ULTIMATE.start_create_#res#1.base| 24) |v_ULTIMATE.start_create_~data1~0#1.base_37| 4) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) 4)) (<= 0 (+ (select (select |v_#memory_int_300| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0) 2147483648)) (= (store |v_#memory_$Pointer$.base_352| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16) (store (select |v_#memory_$Pointer$.base_352| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0 (select (select |v_#memory_$Pointer$.base_353| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 16)) 0))) |v_#memory_$Pointer$.base_353|) (= |v_#memory_$Pointer$.offset_339| (store (store |v_#memory_$Pointer$.offset_337| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_337| |ULTIMATE.start_create_#res#1.base|) 8 0)) |v_ULTIMATE.start_create_~data1~0#1.base_37| (store (select (store |v_#memory_$Pointer$.offset_337| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_337| |ULTIMATE.start_create_#res#1.base|) 8 0)) |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0 (select (select |v_#memory_$Pointer$.offset_339| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0)))) (= (store (store |v_#memory_$Pointer$.base_350| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_350| |ULTIMATE.start_create_#res#1.base|) 8 0)) |v_ULTIMATE.start_create_~data1~0#1.base_37| (store (select (store |v_#memory_$Pointer$.base_350| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_350| |ULTIMATE.start_create_#res#1.base|) 8 0)) |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0 (select (select |v_#memory_$Pointer$.base_352| |v_ULTIMATE.start_create_~data1~0#1.base_37|) 0))) |v_#memory_$Pointer$.base_352|))) (= |ULTIMATE.start_main_#res#1| 0) (<= (+ |ULTIMATE.start_create_#res#1.base| 1) |#StackHeapBarrier|))' at error location [2023-12-02 13:18:41,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 13:18:41,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 13:18:41,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2023-12-02 13:18:41,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777879946] [2023-12-02 13:18:41,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 13:18:41,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 13:18:41,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:18:41,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 13:18:41,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4862, Unknown=39, NotChecked=140, Total=5256 [2023-12-02 13:18:41,345 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 34 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:18:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 13:18:46,819 INFO L93 Difference]: Finished difference Result 138 states and 157 transitions. [2023-12-02 13:18:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 13:18:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2023-12-02 13:18:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 13:18:46,821 INFO L225 Difference]: With dead ends: 138 [2023-12-02 13:18:46,821 INFO L226 Difference]: Without dead ends: 137 [2023-12-02 13:18:46,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 157.6s TimeCoverageRelationStatistics Valid=321, Invalid=6450, Unknown=39, NotChecked=162, Total=6972 [2023-12-02 13:18:46,822 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 86 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 1176 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 13:18:46,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 433 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1176 Invalid, 0 Unknown, 92 Unchecked, 1.7s Time] [2023-12-02 13:18:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-12-02 13:18:46,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 129. [2023-12-02 13:18:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 106 states have (on average 1.320754716981132) internal successors, (140), 122 states have internal predecessors, (140), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 13:18:46,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2023-12-02 13:18:46,827 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 34 [2023-12-02 13:18:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 13:18:46,827 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2023-12-02 13:18:46,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 1 states have call successors, (1), 1 states have call predecessors, (1), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 13:18:46,828 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2023-12-02 13:18:46,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 13:18:46,828 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 13:18:46,828 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] [2023-12-02 13:18:46,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 13:18:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:18:47,029 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-12-02 13:18:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 13:18:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1971967575, now seen corresponding path program 1 times [2023-12-02 13:18:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 13:18:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736797434] [2023-12-02 13:18:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:18:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 13:18:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:18:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:18:47,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 13:18:47,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736797434] [2023-12-02 13:18:47,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736797434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 13:18:47,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690430261] [2023-12-02 13:18:47,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 13:18:47,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 13:18:47,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 13:18:47,405 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 13:18:47,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_584bb138-c3ca-4bf4-ab45-38e5864556cd/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 13:18:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 13:18:47,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 13:18:47,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 13:18:47,652 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 8 treesize of output 1 [2023-12-02 13:18:47,656 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 8 treesize of output 1 [2023-12-02 13:18:47,836 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:18:47,836 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 17 treesize of output 15 [2023-12-02 13:18:47,844 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:18:47,845 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 17 treesize of output 15 [2023-12-02 13:18:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:18:47,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 13:18:48,323 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 13:18:48,330 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 62 treesize of output 55 [2023-12-02 13:18:48,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:18:48,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 52 treesize of output 46 [2023-12-02 13:18:48,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:18:48,344 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 13:18:48,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 58 [2023-12-02 13:18:48,349 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 13:18:48,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 58 treesize of output 52 [2023-12-02 13:18:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 13:18:48,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690430261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 13:18:48,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [996188032] [2023-12-02 13:18:48,456 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2023-12-02 13:18:48,457 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 13:18:48,457 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 13:18:48,457 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 13:18:48,457 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 13:18:49,617 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 13:18:49,623 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 13:20:23,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [996188032] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 13:20:23,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 13:20:23,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [12, 15, 15] total 53 [2023-12-02 13:20:23,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742569984] [2023-12-02 13:20:23,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 13:20:23,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 13:20:23,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 13:20:23,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 13:20:23,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=2451, Unknown=34, NotChecked=0, Total=2756 [2023-12-02 13:20:23,823 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 13:20:29,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:36,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:39,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:42,092 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:44,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:46,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:48,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:50,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:53,077 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:55,604 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:57,613 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:20:59,692 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 13:21:02,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]