./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/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_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/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_f742d084-6fd6-478b-8d9b-d02f0f764a5f/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 7ac435f9525efba17674735293ae04d2f777a83ec5e1b38ed3aaaf0148b05726 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:43:24,569 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:43:24,636 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-12-02 12:43:24,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:43:24,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:43:24,666 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:43:24,667 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:43:24,667 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:43:24,668 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:43:24,668 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:43:24,669 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:43:24,669 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:43:24,670 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:43:24,671 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:43:24,671 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:43:24,672 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:43:24,672 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:43:24,673 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:43:24,673 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:43:24,674 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:43:24,674 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:43:24,676 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:43:24,677 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 12:43:24,678 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 12:43:24,678 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:43:24,678 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:43:24,679 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:43:24,679 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 12:43:24,680 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 12:43:24,680 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 12:43:24,680 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:43:24,681 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 12:43:24,681 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:43:24,681 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:43:24,682 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:43:24,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:43:24,682 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:43:24,682 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:43:24,682 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:43:24,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:43:24,683 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:43:24,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:43:24,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:43:24,684 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:43:24,684 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:43:24,684 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_f742d084-6fd6-478b-8d9b-d02f0f764a5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7ac435f9525efba17674735293ae04d2f777a83ec5e1b38ed3aaaf0148b05726 [2023-12-02 12:43:24,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:43:24,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:43:24,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:43:24,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:43:24,925 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:43:24,926 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety-broom/sll-lst-shared.i [2023-12-02 12:43:27,638 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:43:27,875 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:43:27,876 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/sv-benchmarks/c/memsafety-broom/sll-lst-shared.i [2023-12-02 12:43:27,902 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/data/61e82fccb/7a1e85f84ae640ee9146f603c990a3d9/FLAG743c6506d [2023-12-02 12:43:27,917 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/data/61e82fccb/7a1e85f84ae640ee9146f603c990a3d9 [2023-12-02 12:43:27,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:43:27,921 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:43:27,922 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:43:27,922 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:43:27,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:43:27,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:43:27" (1/1) ... [2023-12-02 12:43:27,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3bafae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:27, skipping insertion in model container [2023-12-02 12:43:27,930 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:43:27" (1/1) ... [2023-12-02 12:43:28,014 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:43:28,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:43:28,254 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:43:28,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:43:28,327 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:43:28,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28 WrapperNode [2023-12-02 12:43:28,327 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:43:28,328 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:43:28,328 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:43:28,329 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:43:28,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,349 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,372 INFO L138 Inliner]: procedures = 121, calls = 23, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 75 [2023-12-02 12:43:28,373 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:43:28,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:43:28,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:43:28,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:43:28,381 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,385 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,394 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,397 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,399 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,400 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,404 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:43:28,405 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:43:28,405 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:43:28,405 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:43:28,406 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (1/1) ... [2023-12-02 12:43:28,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:43:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:28,437 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:43:28,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:43:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 12:43:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-12-02 12:43:28,466 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-12-02 12:43:28,466 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 12:43:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 12:43:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 12:43:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 12:43:28,467 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:43:28,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:43:28,581 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:43:28,584 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:43:28,822 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:43:28,870 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:43:28,870 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 12:43:28,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:43:28 BoogieIcfgContainer [2023-12-02 12:43:28,871 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:43:28,874 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:43:28,874 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:43:28,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:43:28,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:43:27" (1/3) ... [2023-12-02 12:43:28,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4475644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:43:28, skipping insertion in model container [2023-12-02 12:43:28,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:43:28" (2/3) ... [2023-12-02 12:43:28,878 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4475644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:43:28, skipping insertion in model container [2023-12-02 12:43:28,878 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:43:28" (3/3) ... [2023-12-02 12:43:28,879 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-lst-shared.i [2023-12-02 12:43:28,894 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:43:28,895 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 29 error locations. [2023-12-02 12:43:28,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:43:28,938 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;@3d7e05b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:43:28,939 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-12-02 12:43:28,942 INFO L276 IsEmpty]: Start isEmpty. Operand has 60 states, 27 states have (on average 2.259259259259259) internal successors, (61), 56 states have internal predecessors, (61), 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 12:43:28,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:43:28,949 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:28,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:43:28,950 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 26 more)] === [2023-12-02 12:43:28,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:28,954 INFO L85 PathProgramCache]: Analyzing trace with hash 4876116, now seen corresponding path program 1 times [2023-12-02 12:43:28,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:28,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870592968] [2023-12-02 12:43:28,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:28,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:29,140 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 12:43:29,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:29,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870592968] [2023-12-02 12:43:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870592968] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:29,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:43:29,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154292473] [2023-12-02 12:43:29,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:29,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:29,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:29,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:29,177 INFO L87 Difference]: Start difference. First operand has 60 states, 27 states have (on average 2.259259259259259) internal successors, (61), 56 states have internal predecessors, (61), 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 12:43:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:29,264 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2023-12-02 12:43:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:29,267 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 12:43:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:29,274 INFO L225 Difference]: With dead ends: 59 [2023-12-02 12:43:29,275 INFO L226 Difference]: Without dead ends: 58 [2023-12-02 12:43:29,276 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 12:43:29,279 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:29,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 76 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-02 12:43:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-12-02 12:43:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 54 states have internal predecessors, (58), 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 12:43:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2023-12-02 12:43:29,312 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 4 [2023-12-02 12:43:29,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:29,312 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2023-12-02 12:43:29,312 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 12:43:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2023-12-02 12:43:29,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 12:43:29,313 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:29,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 12:43:29,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:43:29,314 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 26 more)] === [2023-12-02 12:43:29,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:29,315 INFO L85 PathProgramCache]: Analyzing trace with hash 4876117, now seen corresponding path program 1 times [2023-12-02 12:43:29,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:29,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847861716] [2023-12-02 12:43:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:29,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:29,402 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 12:43:29,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:29,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847861716] [2023-12-02 12:43:29,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847861716] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:29,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:29,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:43:29,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481551655] [2023-12-02 12:43:29,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:29,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:29,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:29,406 INFO L87 Difference]: Start difference. First operand 58 states and 62 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 12:43:29,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:29,470 INFO L93 Difference]: Finished difference Result 57 states and 61 transitions. [2023-12-02 12:43:29,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:29,471 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 12:43:29,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:29,472 INFO L225 Difference]: With dead ends: 57 [2023-12-02 12:43:29,473 INFO L226 Difference]: Without dead ends: 57 [2023-12-02 12:43:29,473 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 12:43:29,475 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:29,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-02 12:43:29,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-02 12:43:29,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 27 states have (on average 2.111111111111111) internal successors, (57), 53 states have internal predecessors, (57), 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 12:43:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-02 12:43:29,484 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 4 [2023-12-02 12:43:29,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:29,484 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-02 12:43:29,484 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 12:43:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-02 12:43:29,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:43:29,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:29,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:29,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:43:29,486 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 26 more)] === [2023-12-02 12:43:29,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:29,486 INFO L85 PathProgramCache]: Analyzing trace with hash -760919924, now seen corresponding path program 1 times [2023-12-02 12:43:29,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:29,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165701902] [2023-12-02 12:43:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:29,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:29,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:29,557 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 12:43:29,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:29,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165701902] [2023-12-02 12:43:29,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165701902] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:29,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:43:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169451201] [2023-12-02 12:43:29,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:29,561 INFO L87 Difference]: Start difference. First operand 57 states and 61 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 12:43:29,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:29,623 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2023-12-02 12:43:29,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:29,624 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 12:43:29,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:29,627 INFO L225 Difference]: With dead ends: 60 [2023-12-02 12:43:29,627 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 12:43:29,627 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 12:43:29,629 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:29,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 12:43:29,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2023-12-02 12:43:29,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 27 states have (on average 2.074074074074074) internal successors, (56), 52 states have internal predecessors, (56), 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 12:43:29,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2023-12-02 12:43:29,639 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 7 [2023-12-02 12:43:29,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:29,639 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2023-12-02 12:43:29,640 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 12:43:29,640 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2023-12-02 12:43:29,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:43:29,640 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:29,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:29,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:43:29,641 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 26 more)] === [2023-12-02 12:43:29,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash -760919923, now seen corresponding path program 1 times [2023-12-02 12:43:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:29,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744547049] [2023-12-02 12:43:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:29,720 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 12:43:29,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:29,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744547049] [2023-12-02 12:43:29,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744547049] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:29,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:29,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:43:29,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550186918] [2023-12-02 12:43:29,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:29,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:43:29,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:29,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:43:29,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:43:29,723 INFO L87 Difference]: Start difference. First operand 56 states and 60 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 12:43:29,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:29,773 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-12-02 12:43:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:43:29,773 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 12:43:29,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:29,774 INFO L225 Difference]: With dead ends: 59 [2023-12-02 12:43:29,774 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 12:43:29,775 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 12:43:29,776 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:29,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 75 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:43:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 12:43:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2023-12-02 12:43:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 27 states have (on average 2.037037037037037) internal successors, (55), 51 states have internal predecessors, (55), 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 12:43:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-02 12:43:29,782 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 7 [2023-12-02 12:43:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-02 12:43:29,783 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 12:43:29,783 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-02 12:43:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:43:29,784 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:29,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:43:29,784 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 26 more)] === [2023-12-02 12:43:29,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677552, now seen corresponding path program 1 times [2023-12-02 12:43:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:29,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223723934] [2023-12-02 12:43:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:29,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:29,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:29,933 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 12:43:29,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:29,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223723934] [2023-12-02 12:43:29,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223723934] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:29,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:29,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:43:29,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728199822] [2023-12-02 12:43:29,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:29,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:43:29,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:29,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:43:29,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:29,936 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:30,031 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-12-02 12:43:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:43:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:30,033 INFO L225 Difference]: With dead ends: 56 [2023-12-02 12:43:30,033 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 12:43:30,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:30,034 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:30,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 101 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 12:43:30,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2023-12-02 12:43:30,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 48 states have internal predecessors, (52), 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 12:43:30,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-12-02 12:43:30,040 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 8 [2023-12-02 12:43:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:30,040 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-12-02 12:43:30,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-12-02 12:43:30,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 12:43:30,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:30,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:30,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:43:30,042 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 26 more)] === [2023-12-02 12:43:30,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:30,042 INFO L85 PathProgramCache]: Analyzing trace with hash -2113677551, now seen corresponding path program 1 times [2023-12-02 12:43:30,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:30,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554794491] [2023-12-02 12:43:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:30,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:30,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:30,202 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 12:43:30,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:30,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554794491] [2023-12-02 12:43:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554794491] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:30,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:30,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:43:30,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564475901] [2023-12-02 12:43:30,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:30,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:43:30,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:43:30,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:30,205 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:30,337 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-12-02 12:43:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:43:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:30,338 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:43:30,338 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 12:43:30,339 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 12:43:30,340 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 5 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:30,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 12:43:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2023-12-02 12:43:30,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 47 states have internal predecessors, (51), 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 12:43:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-02 12:43:30,345 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 8 [2023-12-02 12:43:30,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:30,346 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-02 12:43:30,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:43:30,346 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-02 12:43:30,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:43:30,347 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:30,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:30,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:43:30,347 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:30,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762607, now seen corresponding path program 1 times [2023-12-02 12:43:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:30,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331877962] [2023-12-02 12:43:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:30,437 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 12:43:30,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:30,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331877962] [2023-12-02 12:43:30,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331877962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:30,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:30,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:43:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241912718] [2023-12-02 12:43:30,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:30,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:43:30,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:43:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:43:30,439 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 12:43:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:30,542 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2023-12-02 12:43:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:43:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2023-12-02 12:43:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:30,544 INFO L225 Difference]: With dead ends: 71 [2023-12-02 12:43:30,544 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 12:43:30,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:30,545 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:30,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 12:43:30,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 62. [2023-12-02 12:43:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.868421052631579) internal successors, (71), 57 states have internal predecessors, (71), 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 12:43:30,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2023-12-02 12:43:30,552 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 13 [2023-12-02 12:43:30,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:30,553 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2023-12-02 12:43:30,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 12:43:30,553 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2023-12-02 12:43:30,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 12:43:30,554 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:30,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:43:30,554 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:30,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1151762608, now seen corresponding path program 1 times [2023-12-02 12:43:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146209318] [2023-12-02 12:43:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:30,767 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 12:43:30,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:30,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146209318] [2023-12-02 12:43:30,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146209318] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:30,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:30,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:43:30,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102881884] [2023-12-02 12:43:30,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:30,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:43:30,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:30,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:43:30,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:43:30,769 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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 12:43:30,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:30,916 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2023-12-02 12:43:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:43:30,917 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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 13 [2023-12-02 12:43:30,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:30,918 INFO L225 Difference]: With dead ends: 72 [2023-12-02 12:43:30,918 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 12:43:30,918 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 12:43:30,919 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:30,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 208 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 12:43:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2023-12-02 12:43:30,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 57 states have internal predecessors, (70), 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 12:43:30,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2023-12-02 12:43:30,925 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 13 [2023-12-02 12:43:30,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:30,925 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2023-12-02 12:43:30,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 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 12:43:30,925 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2023-12-02 12:43:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:43:30,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:30,926 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:30,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:43:30,926 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:30,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1344974105, now seen corresponding path program 1 times [2023-12-02 12:43:30,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:30,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796679849] [2023-12-02 12:43:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:30,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:31,012 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 12:43:31,012 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:31,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796679849] [2023-12-02 12:43:31,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796679849] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:31,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:31,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:43:31,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503619447] [2023-12-02 12:43:31,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:31,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:43:31,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:43:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:43:31,014 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12:43:31,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:31,088 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2023-12-02 12:43:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:43:31,089 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 14 [2023-12-02 12:43:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:31,090 INFO L225 Difference]: With dead ends: 68 [2023-12-02 12:43:31,090 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 12:43:31,090 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 12:43:31,091 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 17 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:31,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 218 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:31,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 12:43:31,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2023-12-02 12:43:31,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.794871794871795) internal successors, (70), 58 states have internal predecessors, (70), 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 12:43:31,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2023-12-02 12:43:31,096 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 14 [2023-12-02 12:43:31,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:31,097 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2023-12-02 12:43:31,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12:43:31,097 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2023-12-02 12:43:31,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 12:43:31,097 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:31,097 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:31,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:43:31,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:31,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:31,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1344904562, now seen corresponding path program 1 times [2023-12-02 12:43:31,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:31,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333768466] [2023-12-02 12:43:31,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:31,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:31,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:31,345 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 12:43:31,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:31,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333768466] [2023-12-02 12:43:31,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333768466] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:31,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:31,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:43:31,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111846292] [2023-12-02 12:43:31,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:31,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:43:31,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:43:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:43:31,348 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 12:43:31,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:31,509 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2023-12-02 12:43:31,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:43:31,510 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 14 [2023-12-02 12:43:31,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:31,511 INFO L225 Difference]: With dead ends: 67 [2023-12-02 12:43:31,511 INFO L226 Difference]: Without dead ends: 67 [2023-12-02 12:43:31,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:43:31,512 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:31,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 143 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-02 12:43:31,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-12-02 12:43:31,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 62 states have internal predecessors, (74), 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 12:43:31,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2023-12-02 12:43:31,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 14 [2023-12-02 12:43:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:31,517 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2023-12-02 12:43:31,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 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 12:43:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2023-12-02 12:43:31,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:43:31,518 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:31,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:31,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 12:43:31,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:31,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:31,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264992, now seen corresponding path program 1 times [2023-12-02 12:43:31,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:31,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157283365] [2023-12-02 12:43:31,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:31,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:31,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:31,626 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 12:43:31,626 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:31,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157283365] [2023-12-02 12:43:31,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157283365] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:31,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:43:31,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:43:31,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014081360] [2023-12-02 12:43:31,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:31,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:43:31,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:43:31,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:43:31,628 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 12:43:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:31,747 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2023-12-02 12:43:31,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:43:31,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 15 [2023-12-02 12:43:31,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:31,748 INFO L225 Difference]: With dead ends: 68 [2023-12-02 12:43:31,748 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 12:43:31,748 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 12:43:31,749 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:31,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 95 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:43:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 12:43:31,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2023-12-02 12:43:31,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.697674418604651) internal successors, (73), 62 states have internal predecessors, (73), 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 12:43:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2023-12-02 12:43:31,754 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 15 [2023-12-02 12:43:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:31,755 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2023-12-02 12:43:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 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 12:43:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2023-12-02 12:43:31,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 12:43:31,755 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:31,755 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:31,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:43:31,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:31,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:31,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1212264991, now seen corresponding path program 1 times [2023-12-02 12:43:31,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:31,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119691697] [2023-12-02 12:43:31,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:31,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:31,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:32,076 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 12:43:32,076 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119691697] [2023-12-02 12:43:32,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119691697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:32,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725019606] [2023-12-02 12:43:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:32,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:32,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:32,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:32,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:43:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:32,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 12:43:32,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:32,238 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 12:43:32,241 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 12:43:32,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:43:32,355 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 12:43:32,368 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:43:32,369 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 12:43:32,442 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 12:43:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:43:32,466 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 12:43:32,476 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:43:32,477 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 12:43:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 12:43:32,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:32,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725019606] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:32,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792381488] [2023-12-02 12:43:32,636 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 12:43:32,636 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:43:32,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:43:32,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:43:32,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:43:33,289 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 125 for LOIs [2023-12-02 12:43:33,356 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:43:46,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1542#(and (or (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_57|)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (exists ((|v_#memory_int_42| (Array Int (Array Int Int)))) (= (store |v_#memory_int_42| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_42| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8))) |#memory_int|)) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_41| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_5| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_5| (store |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_5| |ULTIMATE.start_create_~now~0#1.base|) 0)))) (<= 0 (+ (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_41|) (<= (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (= (store |v_#memory_int_39| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_create_~sll~0#1.base|) 8 (select (select |v_#memory_int_40| |ULTIMATE.start_create_~sll~0#1.base|) 8))) |v_#memory_int_40|))) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_57|)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.offset_58| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_58| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (exists ((|v_#valid_73| (Array Int Int))) (and (= (select (store |v_#valid_73| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0) (= (select |v_#valid_73| |ULTIMATE.start_create_~sll~0#1.base|) 0))) (exists ((|v_#valid_75| (Array Int Int))) (and (= (select |v_#valid_75| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= (store |v_#valid_75| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|))) (exists ((|v_#length_62| (Array Int Int))) (= (store |v_#length_62| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (exists ((|v_#memory_$Pointer$.base_58| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_58| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_58| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0))))) (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_43| (Array Int (Array Int Int)))) (= (store |v_#memory_int_43| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_43| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8))) |#memory_int|)) (exists ((|v_#memory_int_40| (Array Int (Array Int Int))) (|v_#memory_int_41| (Array Int (Array Int Int))) (|v_old(#memory_int)_AFTER_CALL_6| (Array Int (Array Int Int))) (|v_#memory_int_39| (Array Int (Array Int Int)))) (and (<= 0 (+ (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= (store |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_40| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_41|) (= (store |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_41| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_6| |ULTIMATE.start_create_~now~0#1.base|) 0))) |v_old(#memory_int)_AFTER_CALL_6|) (<= (select (select |v_#memory_int_41| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (= (store |v_#memory_int_39| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_create_~sll~0#1.base|) 8 (select (select |v_#memory_int_40| |ULTIMATE.start_create_~sll~0#1.base|) 8))) |v_#memory_int_40|))) (exists ((|v_#memory_$Pointer$.base_59| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_59| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_59| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#length_63| (Array Int Int))) (= (store |v_#length_63| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (exists ((|v_#memory_$Pointer$.base_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_57|)) (exists ((|v_#memory_$Pointer$.offset_59| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_59| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_59| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_76| (Array Int Int))) (and (= (select |v_#valid_76| |ULTIMATE.start_create_~sll~0#1.base|) 0) (= (select (store |v_#valid_76| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0))) (exists ((|v_#memory_$Pointer$.offset_55| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_57| (Array Int (Array Int Int)))) (= (store (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_55| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_57| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.offset_57|)) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#valid_73| (Array Int Int))) (and (= (select |v_#valid_73| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= (store |v_#valid_73| |ULTIMATE.start_create_#t~ret8#1.base| 1) |#valid|))) (exists ((|v_ULTIMATE.start_create_#t~nondet7#1_12| Int)) (and (<= |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483647) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_12| 2147483648)) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_12| 0)))))) (<= 1 |#StackHeapBarrier|) (<= (select |#length| |ULTIMATE.start_create_~now~0#1.base|) 15) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= |ULTIMATE.start_create_~data~0#1.offset| 0) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0))' at error location [2023-12-02 12:43:46,306 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:43:46,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:43:46,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2023-12-02 12:43:46,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220598011] [2023-12-02 12:43:46,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:43:46,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 12:43:46,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 12:43:46,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=602, Unknown=5, NotChecked=50, Total=756 [2023-12-02 12:43:46,308 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:43:46,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:43:46,667 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-02 12:43:46,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:43:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 15 [2023-12-02 12:43:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:43:46,669 INFO L225 Difference]: With dead ends: 69 [2023-12-02 12:43:46,669 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 12:43:46,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=117, Invalid=694, Unknown=5, NotChecked=54, Total=870 [2023-12-02 12:43:46,670 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 15 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:43:46,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 237 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 337 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2023-12-02 12:43:46,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 12:43:46,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2023-12-02 12:43:46,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.627906976744186) internal successors, (70), 62 states have internal predecessors, (70), 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 12:43:46,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2023-12-02 12:43:46,673 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 15 [2023-12-02 12:43:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:43:46,673 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2023-12-02 12:43:46,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 12:43:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2023-12-02 12:43:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 12:43:46,674 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:43:46,674 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:43:46,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:43:46,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:46,875 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:43:46,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:43:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -331815379, now seen corresponding path program 1 times [2023-12-02 12:43:46,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:43:46,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166707961] [2023-12-02 12:43:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:43:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:47,244 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 12:43:47,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:43:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166707961] [2023-12-02 12:43:47,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166707961] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:43:47,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85590040] [2023-12-02 12:43:47,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:43:47,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:43:47,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:43:47,246 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:43:47,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:43:47,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:43:47,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-02 12:43:47,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:43:47,333 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 12:43:47,354 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 12:43:47,358 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 12:43:47,424 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:43:47,424 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 12:43:47,483 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 12:43:47,490 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 12:43:47,526 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-12-02 12:43:47,526 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 23 treesize of output 15 [2023-12-02 12:43:47,550 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-12-02 12:43:47,550 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 1 case distinctions, treesize of input 23 treesize of output 15 [2023-12-02 12:43:47,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:43:47,916 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 59 treesize of output 43 [2023-12-02 12:43:47,922 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 39 treesize of output 31 [2023-12-02 12:43:48,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:48,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:43:48,644 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_create_~now~0#1.offset| Int) (v_ArrVal_291 (Array Int Int)) (|v_ULTIMATE.start_loop_~x#1.offset_27| Int)) (let ((.cse0 (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_291))) (store .cse1 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse1 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) (+ |v_ULTIMATE.start_loop_~x#1.offset_27| 8)))) (or (= (select |c_#valid| .cse0) 1) (= .cse0 0) (< |v_ULTIMATE.start_loop_~x#1.offset_27| 0) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_27|)))) (forall ((v_ArrVal_290 (Array Int Int)) (|ULTIMATE.start_create_~now~0#1.offset| Int) (v_ArrVal_291 (Array Int Int)) (v_ArrVal_295 Int) (|v_ULTIMATE.start_loop_~x#1.offset_27| Int)) (let ((.cse3 (+ |v_ULTIMATE.start_loop_~x#1.offset_27| 8))) (or (= (select |c_#valid| (select (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_291))) (store .cse2 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse2 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| |c_ULTIMATE.start_create_~data~0#1.base|))) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3)) 1) (< |v_ULTIMATE.start_loop_~x#1.offset_27| 0) (= (select (select (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_~data~0#1.base| v_ArrVal_290))) (store .cse4 |c_ULTIMATE.start_create_~now~0#1.base| (store (select .cse4 |c_ULTIMATE.start_create_~now~0#1.base|) |ULTIMATE.start_create_~now~0#1.offset| v_ArrVal_295))) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse3) 0) (< |c_ULTIMATE.start_create_~sll~0#1.offset| |v_ULTIMATE.start_loop_~x#1.offset_27|))))) is different from false [2023-12-02 12:43:49,140 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:43:49,141 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 137 treesize of output 138 [2023-12-02 12:43:49,151 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:43:49,152 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 127 treesize of output 108 [2023-12-02 12:43:49,159 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 124 treesize of output 120 [2023-12-02 12:43:49,166 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 180 treesize of output 172 [2023-12-02 12:43:49,173 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 173 treesize of output 169 [2023-12-02 12:43:49,181 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 176 treesize of output 172 [2023-12-02 12:43:49,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:43:49,198 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 195 treesize of output 195 [2023-12-02 12:43:49,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:43:49,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 225 treesize of output 233 [2023-12-02 12:43:49,251 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 214 treesize of output 206 [2023-12-02 12:43:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:43:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85590040] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:43:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [615485566] [2023-12-02 12:43:50,814 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 12:43:50,814 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:43:50,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:43:50,815 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:43:50,815 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:43:51,298 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 12:43:51,308 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:43:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [615485566] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:43:58,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:43:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 10, 11] total 40 [2023-12-02 12:43:58,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286062850] [2023-12-02 12:43:58,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:43:58,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 12:43:58,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:43:58,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 12:43:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1316, Unknown=3, NotChecked=74, Total=1560 [2023-12-02 12:43:58,725 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 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 12:44:00,962 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 12:44:03,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:05,084 WARN L539 Checker$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 12:44:07,161 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 12:44:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:08,412 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2023-12-02 12:44:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:44:08,413 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 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 16 [2023-12-02 12:44:08,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:08,414 INFO L225 Difference]: With dead ends: 73 [2023-12-02 12:44:08,414 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 12:44:08,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=167, Invalid=1316, Unknown=3, NotChecked=74, Total=1560 [2023-12-02 12:44:08,415 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:08,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 507 Invalid, 4 Unknown, 0 Unchecked, 9.7s Time] [2023-12-02 12:44:08,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 12:44:08,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-12-02 12:44:08,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 46 states have (on average 1.608695652173913) internal successors, (74), 65 states have internal predecessors, (74), 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 12:44:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2023-12-02 12:44:08,420 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 16 [2023-12-02 12:44:08,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:08,420 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2023-12-02 12:44:08,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 1.3) internal successors, (13), 10 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 12:44:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2023-12-02 12:44:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:44:08,421 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:08,421 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:08,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:44:08,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:08,621 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:08,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:08,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422936, now seen corresponding path program 1 times [2023-12-02 12:44:08,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:08,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750639007] [2023-12-02 12:44:08,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:08,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:08,741 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 12:44:08,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:08,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750639007] [2023-12-02 12:44:08,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750639007] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:08,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:08,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:44:08,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083308827] [2023-12-02 12:44:08,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:08,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:44:08,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:44:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:44:08,744 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12:44:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:08,845 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2023-12-02 12:44:08,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:44:08,845 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 17 [2023-12-02 12:44:08,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:08,846 INFO L225 Difference]: With dead ends: 70 [2023-12-02 12:44:08,846 INFO L226 Difference]: Without dead ends: 70 [2023-12-02 12:44:08,846 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 12:44:08,847 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:08,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 126 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-12-02 12:44:08,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-12-02 12:44:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.565217391304348) internal successors, (72), 64 states have internal predecessors, (72), 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 12:44:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2023-12-02 12:44:08,851 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 17 [2023-12-02 12:44:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:08,851 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2023-12-02 12:44:08,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 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 12:44:08,851 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2023-12-02 12:44:08,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:44:08,852 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:08,852 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:08,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 12:44:08,852 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:08,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:08,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1050422935, now seen corresponding path program 1 times [2023-12-02 12:44:08,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:08,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616994411] [2023-12-02 12:44:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:09,100 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 12:44:09,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616994411] [2023-12-02 12:44:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616994411] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:09,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:09,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288730999] [2023-12-02 12:44:09,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:09,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:44:09,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:44:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:44:09,102 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 12:44:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:09,249 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2023-12-02 12:44:09,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:44:09,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 17 [2023-12-02 12:44:09,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:09,250 INFO L225 Difference]: With dead ends: 69 [2023-12-02 12:44:09,250 INFO L226 Difference]: Without dead ends: 69 [2023-12-02 12:44:09,250 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 12:44:09,251 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:09,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:09,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-02 12:44:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-12-02 12:44:09,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 63 states have internal predecessors, (70), 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 12:44:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2023-12-02 12:44:09,254 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 17 [2023-12-02 12:44:09,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:09,255 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2023-12-02 12:44:09,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 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 12:44:09,255 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2023-12-02 12:44:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:44:09,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:09,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:09,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 12:44:09,256 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:09,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:09,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1696270501, now seen corresponding path program 1 times [2023-12-02 12:44:09,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:09,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274215339] [2023-12-02 12:44:09,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:09,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:09,328 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 12:44:09,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:09,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274215339] [2023-12-02 12:44:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274215339] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:09,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998104843] [2023-12-02 12:44:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:09,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:09,330 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:09,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:44:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:09,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 12:44:09,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:09,464 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 12:44:09,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:44:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998104843] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:09,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:44:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-12-02 12:44:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732256199] [2023-12-02 12:44:09,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:44:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:44:09,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:44:09,466 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 12:44:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:09,600 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-12-02 12:44:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:44:09,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 17 [2023-12-02 12:44:09,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:09,602 INFO L225 Difference]: With dead ends: 94 [2023-12-02 12:44:09,602 INFO L226 Difference]: Without dead ends: 94 [2023-12-02 12:44:09,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:44:09,603 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:09,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 94 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:09,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-12-02 12:44:09,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2023-12-02 12:44:09,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 69 states have internal predecessors, (84), 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 12:44:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 90 transitions. [2023-12-02 12:44:09,607 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 90 transitions. Word has length 17 [2023-12-02 12:44:09,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:09,607 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 90 transitions. [2023-12-02 12:44:09,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 12:44:09,607 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 90 transitions. [2023-12-02 12:44:09,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 12:44:09,608 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:09,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:09,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:44:09,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 12:44:09,812 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:09,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:09,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1696270500, now seen corresponding path program 1 times [2023-12-02 12:44:09,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:09,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603570854] [2023-12-02 12:44:09,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:09,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:09,958 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 12:44:09,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603570854] [2023-12-02 12:44:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603570854] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:09,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591012438] [2023-12-02 12:44:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:09,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:09,959 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:09,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:44:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:10,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 12:44:10,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:10,161 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 12:44:10,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:10,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:10,206 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 12:44:10,268 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 12:44:10,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591012438] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:10,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824225621] [2023-12-02 12:44:10,271 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 12:44:10,271 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:10,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:10,271 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:10,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:10,703 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 12:44:10,711 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:18,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [824225621] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:18,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:18,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [8, 5, 5] total 28 [2023-12-02 12:44:18,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276676455] [2023-12-02 12:44:18,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:18,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:44:18,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:18,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:44:18,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=713, Unknown=2, NotChecked=0, Total=812 [2023-12-02 12:44:18,085 INFO L87 Difference]: Start difference. First operand 75 states and 90 transitions. Second operand has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 12:44:20,332 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 12:44:22,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:24,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:26,571 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 12:44:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:28,345 INFO L93 Difference]: Finished difference Result 83 states and 98 transitions. [2023-12-02 12:44:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:44:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 17 [2023-12-02 12:44:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:28,347 INFO L225 Difference]: With dead ends: 83 [2023-12-02 12:44:28,347 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:44:28,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=97, Invalid=713, Unknown=2, NotChecked=0, Total=812 [2023-12-02 12:44:28,348 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 7 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:28,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 116 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 540 Invalid, 4 Unknown, 0 Unchecked, 10.2s Time] [2023-12-02 12:44:28,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:44:28,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 77. [2023-12-02 12:44:28,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.5636363636363637) internal successors, (86), 71 states have internal predecessors, (86), 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 12:44:28,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2023-12-02 12:44:28,351 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 17 [2023-12-02 12:44:28,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:28,351 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2023-12-02 12:44:28,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 12:44:28,351 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2023-12-02 12:44:28,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 12:44:28,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:28,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:28,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:44:28,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:44:28,553 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:28,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:28,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1044777931, now seen corresponding path program 1 times [2023-12-02 12:44:28,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:28,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595509560] [2023-12-02 12:44:28,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:28,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:28,699 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 12:44:28,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:28,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595509560] [2023-12-02 12:44:28,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595509560] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:28,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:28,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:28,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872222241] [2023-12-02 12:44:28,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:28,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:44:28,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:28,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:44:28,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:44:28,701 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 12:44:28,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:28,884 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2023-12-02 12:44:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:44:28,885 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 18 [2023-12-02 12:44:28,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:28,886 INFO L225 Difference]: With dead ends: 102 [2023-12-02 12:44:28,886 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 12:44:28,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:44:28,887 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:28,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 149 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 12:44:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2023-12-02 12:44:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 72 states have internal predecessors, (87), 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 12:44:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2023-12-02 12:44:28,891 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 18 [2023-12-02 12:44:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:28,891 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2023-12-02 12:44:28,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 12:44:28,891 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2023-12-02 12:44:28,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:44:28,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:28,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:44:28,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 12:44:28,892 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:28,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:28,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1971622619, now seen corresponding path program 1 times [2023-12-02 12:44:28,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:28,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611926898] [2023-12-02 12:44:28,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:28,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:29,046 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 12:44:29,046 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:29,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611926898] [2023-12-02 12:44:29,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611926898] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:29,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:29,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:44:29,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030960571] [2023-12-02 12:44:29,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:29,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:44:29,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:29,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:44:29,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:44:29,048 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 12:44:29,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:29,251 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2023-12-02 12:44:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:44:29,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 12:44:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:29,252 INFO L225 Difference]: With dead ends: 101 [2023-12-02 12:44:29,252 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 12:44:29,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:44:29,253 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:29,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 120 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:44:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 12:44:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2023-12-02 12:44:29,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.543859649122807) internal successors, (88), 73 states have internal predecessors, (88), 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 12:44:29,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2023-12-02 12:44:29,257 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 19 [2023-12-02 12:44:29,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:29,257 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2023-12-02 12:44:29,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 states have internal predecessors, (17), 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 12:44:29,257 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2023-12-02 12:44:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 12:44:29,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:29,258 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 12:44:29,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 12:44:29,259 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash 990759159, now seen corresponding path program 1 times [2023-12-02 12:44:29,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:29,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051170774] [2023-12-02 12:44:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:29,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:29,426 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 12:44:29,427 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051170774] [2023-12-02 12:44:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051170774] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 12:44:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563925561] [2023-12-02 12:44:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:29,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:44:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:29,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:44:29,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:44:29,429 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 12:44:29,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:29,628 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2023-12-02 12:44:29,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:44:29,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 12:44:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:29,629 INFO L225 Difference]: With dead ends: 80 [2023-12-02 12:44:29,630 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 12:44:29,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:44:29,630 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:29,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 165 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:44:29,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 12:44:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-02 12:44:29,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 74 states have internal predecessors, (89), 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 12:44:29,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 95 transitions. [2023-12-02 12:44:29,634 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 95 transitions. Word has length 20 [2023-12-02 12:44:29,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:29,635 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 95 transitions. [2023-12-02 12:44:29,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 12:44:29,635 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 95 transitions. [2023-12-02 12:44:29,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:44:29,636 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:29,636 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 12:44:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-02 12:44:29,637 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:29,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1363182687, now seen corresponding path program 1 times [2023-12-02 12:44:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:29,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632040445] [2023-12-02 12:44:29,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:29,737 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 12:44:29,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:29,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632040445] [2023-12-02 12:44:29,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632040445] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:29,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:29,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:44:29,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507299045] [2023-12-02 12:44:29,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:29,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:44:29,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:29,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:44:29,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:44:29,739 INFO L87 Difference]: Start difference. First operand 80 states and 95 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12:44:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:29,863 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-02 12:44:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:44:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12:44:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:29,864 INFO L225 Difference]: With dead ends: 87 [2023-12-02 12:44:29,864 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 12:44:29,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 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 12:44:29,865 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 57 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:29,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 158 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:44:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 12:44:29,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2023-12-02 12:44:29,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.4736842105263157) internal successors, (84), 73 states have internal predecessors, (84), 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 12:44:29,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2023-12-02 12:44:29,869 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 22 [2023-12-02 12:44:29,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:29,869 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2023-12-02 12:44:29,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 12:44:29,869 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2023-12-02 12:44:29,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:44:29,870 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:29,870 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 12:44:29,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-02 12:44:29,870 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:29,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:29,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1363183910, now seen corresponding path program 1 times [2023-12-02 12:44:29,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:29,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135990460] [2023-12-02 12:44:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:29,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,102 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 12:44:30,103 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:30,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135990460] [2023-12-02 12:44:30,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135990460] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:30,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:44:30,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 12:44:30,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143352197] [2023-12-02 12:44:30,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:30,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 12:44:30,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:30,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 12:44:30,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:44:30,104 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 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 12:44:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:30,369 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2023-12-02 12:44:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 12:44:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 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 12:44:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:30,371 INFO L225 Difference]: With dead ends: 87 [2023-12-02 12:44:30,371 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 12:44:30,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:44:30,372 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:30,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 126 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:44:30,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 12:44:30,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 81. [2023-12-02 12:44:30,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4745762711864407) internal successors, (87), 75 states have internal predecessors, (87), 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 12:44:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-12-02 12:44:30,375 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 22 [2023-12-02 12:44:30,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:30,376 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-12-02 12:44:30,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 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 12:44:30,376 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-12-02 12:44:30,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 12:44:30,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:30,377 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 12:44:30,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-12-02 12:44:30,377 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:30,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1363183909, now seen corresponding path program 1 times [2023-12-02 12:44:30,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:30,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217049430] [2023-12-02 12:44:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,527 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 12:44:30,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:30,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217049430] [2023-12-02 12:44:30,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217049430] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:30,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301980527] [2023-12-02 12:44:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:30,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:30,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:30,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 12:44:30,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:30,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 12:44:30,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:30,738 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 12:44:30,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:30,839 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:30,840 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 19 [2023-12-02 12:44:30,891 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 12:44:30,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301980527] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:30,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343931996] [2023-12-02 12:44:30,894 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 12:44:30,894 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:30,895 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:30,895 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:30,895 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:31,507 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 12:44:31,516 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:44:40,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [343931996] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:44:40,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:44:40,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [8, 5, 5] total 30 [2023-12-02 12:44:40,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805267479] [2023-12-02 12:44:40,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:44:40,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 12:44:40,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:44:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 12:44:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=809, Unknown=2, NotChecked=0, Total=930 [2023-12-02 12:44:40,098 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 12:44:42,315 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 12:44:44,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:44:46,440 WARN L539 Checker$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 12:44:48,534 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 12:44:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:44:50,819 INFO L93 Difference]: Finished difference Result 84 states and 95 transitions. [2023-12-02 12:44:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:44:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 12:44:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:44:50,820 INFO L225 Difference]: With dead ends: 84 [2023-12-02 12:44:50,820 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 12:44:50,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=119, Invalid=809, Unknown=2, NotChecked=0, Total=930 [2023-12-02 12:44:50,821 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 3 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:44:50,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 68 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 580 Invalid, 4 Unknown, 0 Unchecked, 10.7s Time] [2023-12-02 12:44:50,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 12:44:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-12-02 12:44:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 77 states have internal predecessors, (88), 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 12:44:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-12-02 12:44:50,823 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 22 [2023-12-02 12:44:50,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:44:50,824 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-12-02 12:44:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 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 12:44:50,824 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-12-02 12:44:50,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 12:44:50,825 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:44:50,825 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] [2023-12-02 12:44:50,829 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 12:44:51,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 12:44:51,025 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:44:51,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:44:51,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1815314652, now seen corresponding path program 1 times [2023-12-02 12:44:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:44:51,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986019383] [2023-12-02 12:44:51,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:51,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:44:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:51,237 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 12:44:51,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:44:51,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986019383] [2023-12-02 12:44:51,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986019383] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:44:51,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805061780] [2023-12-02 12:44:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:44:51,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:44:51,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:44:51,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:44:51,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 12:44:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:44:51,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 12:44:51,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:44:51,479 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 12:44:51,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:44:51,573 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:44:51,573 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 19 [2023-12-02 12:44:51,719 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 12:44:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805061780] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:44:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1039053509] [2023-12-02 12:44:51,722 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:44:51,722 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:44:51,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:44:51,722 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:44:51,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:44:57,883 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:44:57,888 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:45:27,442 WARN L293 SmtUtils]: Spent 9.42s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:45:39,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4183#(and (<= (+ |ULTIMATE.start_loop_~x#1.offset| 8) (select |#length| |ULTIMATE.start_loop_~x#1.base|)) (= |ULTIMATE.start_main_~l~0#1.offset| |ULTIMATE.start_create_#res#1.offset|) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_38| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_~now~0#1.base_38|) 1) (<= 8 (select |#length| |v_ULTIMATE.start_create_~now~0#1.base_38|)))) (exists ((|v_ULTIMATE.start_create_#t~mem9#1.base_22| Int) (|v_#memory_int_91| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_112| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_112| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.offset_21| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) 1) (= |#memory_int| (store |v_#memory_int_91| |v_ULTIMATE.start_create_#t~mem9#1.base_22| (store (select |v_#memory_int_91| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21| (select (select |#memory_int| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_112| |v_ULTIMATE.start_create_#t~mem9#1.base_22| (store (select |v_#memory_$Pointer$.offset_112| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21|)))) (<= (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_21|) (select |#length| |v_ULTIMATE.start_create_#t~mem9#1.base_22|)) (<= 0 |v_ULTIMATE.start_create_#t~mem9#1.offset_21|) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_112| |v_ULTIMATE.start_create_#t~mem9#1.base_22| (store (select |v_#memory_$Pointer$.base_112| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_#t~mem9#1.base_22|) |v_ULTIMATE.start_create_#t~mem9#1.offset_21|)))))) (= |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|) (= (select |#valid| |ULTIMATE.start_loop_~x#1.base|) 1) (= |ULTIMATE.start_loop_~x#1.offset| |ULTIMATE.start_loop_#in~x#1.offset|) (or (not (= |ULTIMATE.start_loop_~x#1.base| 0)) (not (= |ULTIMATE.start_loop_~x#1.offset| 0))) (<= (select |#length| |ULTIMATE.start_loop_~x#1.base|) (+ |ULTIMATE.start_loop_~x#1.offset| 15)) (= |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 12:45:39,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:45:39,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:45:39,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2023-12-02 12:45:39,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801056123] [2023-12-02 12:45:39,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:45:39,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:45:39,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:45:39,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:45:39,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1125, Unknown=3, NotChecked=0, Total=1260 [2023-12-02 12:45:39,298 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 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 12:45:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:45:39,536 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2023-12-02 12:45:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:45:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 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 24 [2023-12-02 12:45:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:45:39,538 INFO L225 Difference]: With dead ends: 85 [2023-12-02 12:45:39,538 INFO L226 Difference]: Without dead ends: 85 [2023-12-02 12:45:39,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 41.7s TimeCoverageRelationStatistics Valid=139, Invalid=1190, Unknown=3, NotChecked=0, Total=1332 [2023-12-02 12:45:39,539 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 7 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:45:39,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 396 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 12:45:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-02 12:45:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-12-02 12:45:39,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 78 states have internal predecessors, (89), 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 12:45:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2023-12-02 12:45:39,542 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 24 [2023-12-02 12:45:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:45:39,542 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2023-12-02 12:45:39,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 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 12:45:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2023-12-02 12:45:39,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 12:45:39,543 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:45:39,543 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:45:39,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 12:45:39,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 12:45:39,744 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:45:39,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:45:39,744 INFO L85 PathProgramCache]: Analyzing trace with hash -394812818, now seen corresponding path program 1 times [2023-12-02 12:45:39,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:45:39,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195859562] [2023-12-02 12:45:39,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:39,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:45:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:40,041 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 12:45:40,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:45:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195859562] [2023-12-02 12:45:40,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195859562] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:40,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602296120] [2023-12-02 12:45:40,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:45:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:45:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:45:40,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:45:40,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 12:45:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:45:40,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 12:45:40,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:45:40,210 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:45:40,210 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 12:45:40,244 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 12:45:40,323 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 12:45:40,323 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 12:45:40,333 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 12:45:40,387 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 12:45:40,427 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2023-12-02 12:45:40,427 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 12:45:40,435 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 12:45:40,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:45:40,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602296120] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:45:40,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1320714098] [2023-12-02 12:45:40,492 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 12:45:40,492 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:45:40,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:45:40,492 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:45:40,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:45:46,461 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:45:46,468 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:46:22,713 WARN L293 SmtUtils]: Spent 10.33s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:46:26,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4467#(and (= |ULTIMATE.start_create_#t~ret8#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_create_~now~0#1.base|) 1)))' at error location [2023-12-02 12:46:26,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:46:26,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:46:26,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-12-02 12:46:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10714733] [2023-12-02 12:46:26,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:46:26,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 12:46:26,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:46:26,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 12:46:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=829, Unknown=3, NotChecked=58, Total=992 [2023-12-02 12:46:26,421 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 12:46:26,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:46:26,835 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-12-02 12:46:26,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 12:46:26,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 25 [2023-12-02 12:46:26,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:46:26,836 INFO L225 Difference]: With dead ends: 83 [2023-12-02 12:46:26,836 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 12:46:26,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 40.3s TimeCoverageRelationStatistics Valid=110, Invalid=883, Unknown=3, NotChecked=60, Total=1056 [2023-12-02 12:46:26,837 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 12:46:26,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 247 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 319 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2023-12-02 12:46:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 12:46:26,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 12:46:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 77 states have internal predecessors, (88), 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 12:46:26,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-12-02 12:46:26,840 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 25 [2023-12-02 12:46:26,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:46:26,840 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-12-02 12:46:26,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 16 states have internal predecessors, (28), 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 12:46:26,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-12-02 12:46:26,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 12:46:26,841 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:46:26,841 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:46:26,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 12:46:27,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 12:46:27,041 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:46:27,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:46:27,042 INFO L85 PathProgramCache]: Analyzing trace with hash -394812817, now seen corresponding path program 1 times [2023-12-02 12:46:27,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:46:27,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432715078] [2023-12-02 12:46:27,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:46:27,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:46:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:46:27,829 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 12:46:27,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:46:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432715078] [2023-12-02 12:46:27,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432715078] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:46:27,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785411952] [2023-12-02 12:46:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:46:27,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:46:27,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:46:27,830 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:46:27,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 12:46:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:46:27,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 12:46:27,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:46:28,091 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:46:28,092 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 12:46:28,167 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 12:46:28,181 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 12:46:28,330 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 12:46:28,330 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 81 treesize of output 74 [2023-12-02 12:46:28,337 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 49 treesize of output 30 [2023-12-02 12:46:28,357 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 50 treesize of output 26 [2023-12-02 12:46:28,364 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 32 treesize of output 14 [2023-12-02 12:46:28,468 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 12:46:28,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:46:28,482 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 16 treesize of output 11 [2023-12-02 12:46:28,502 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-12-02 12:46:28,502 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 12:46:28,540 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 12:46:28,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:46:28,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785411952] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:46:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [65912374] [2023-12-02 12:46:28,689 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 12:46:28,689 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:46:28,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:46:28,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:46:28,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:46:34,648 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:46:34,654 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:47:32,857 WARN L293 SmtUtils]: Spent 10.42s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:47:38,635 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4751#(and (or (and (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (exists ((|v_old(#length)_AFTER_CALL_47| (Array Int Int)) (|v_ULTIMATE.start_create_#t~nondet7#1_32| Int) (|v_old(#memory_int)_AFTER_CALL_47| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_47| (Array Int (Array Int Int))) (|v_old(#valid)_AFTER_CALL_47| (Array Int Int)) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_47| (Array Int (Array Int Int)))) (and (or (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (exists ((|v_#length_117| (Array Int Int))) (= |v_old(#length)_AFTER_CALL_47| (store (store |v_#length_117| |ULTIMATE.start_create_~sll~0#1.base| 16) |ULTIMATE.start_create_~data~0#1.base| 4))) (exists ((|v_#valid_140| (Array Int Int))) (and (= (store (store |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base| 1) |v_old(#valid)_AFTER_CALL_47|) (= (select (store |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0) (= (select |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base|) 0))) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.base_140| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_138| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_47| (store |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~now~0#1.base|) 0 |ULTIMATE.start_create_~data~0#1.base|))) (= (store (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_140|))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_create_~data~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.offset_138| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_136| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_47| (store |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~now~0#1.base|) 0 0))) (= |v_#memory_$Pointer$.offset_138| (store (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~data~0#1.base|) 0)))))) (exists ((|v_#memory_int_114| (Array Int (Array Int Int))) (|v_#memory_int_115| (Array Int (Array Int Int))) (|v_#memory_int_113| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_114| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_114| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_115|) (<= 0 (+ (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (= |v_old(#memory_int)_AFTER_CALL_47| (store |v_#memory_int_115| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_115| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_47| |ULTIMATE.start_create_~now~0#1.base|) 0)))) (<= (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (= (store |v_#memory_int_113| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_113| |ULTIMATE.start_create_~sll~0#1.base|) 8 (select (select |v_#memory_int_114| |ULTIMATE.start_create_~sll~0#1.base|) 8))) |v_#memory_int_114|)))) (and (exists ((|v_ULTIMATE.start_create_#t~mem9#1.base_28| Int) (|v_#memory_int_121| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.offset_25| Int) (|v_#memory_$Pointer$.base_146| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_144| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_47| (store |v_#memory_int_121| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_int_121| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| (select (select |v_old(#memory_int)_AFTER_CALL_47| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25|)))) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_47| (store |v_#memory_$Pointer$.offset_144| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_$Pointer$.offset_144| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| |ULTIMATE.start_create_~data~0#1.offset|))) (= (select |v_old(#valid)_AFTER_CALL_47| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) 1) (<= (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_25|) (select |v_old(#length)_AFTER_CALL_47| |v_ULTIMATE.start_create_#t~mem9#1.base_28|)) (= (store |v_#memory_$Pointer$.base_146| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_$Pointer$.base_146| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_47|) (<= 0 |v_ULTIMATE.start_create_#t~mem9#1.offset_25|))) (exists ((|v_ULTIMATE.start_create_~now~0#1.base_45| Int) (|v_ULTIMATE.start_create_~now~0#1.offset_41| Int)) (and (<= (+ 16 |v_ULTIMATE.start_create_~now~0#1.offset_41|) (select |v_old(#length)_AFTER_CALL_47| |v_ULTIMATE.start_create_~now~0#1.base_45|)) (<= 0 (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|)) (= |ULTIMATE.start_create_~now~0#1.offset| (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_47| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|))) (= |ULTIMATE.start_create_~now~0#1.base| (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_47| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|))) (= (select |v_old(#valid)_AFTER_CALL_47| |v_ULTIMATE.start_create_~now~0#1.base_45|) 1))))) (not (= |v_ULTIMATE.start_create_#t~nondet7#1_32| 0)) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_32| 2147483648)) (<= |v_ULTIMATE.start_create_#t~nondet7#1_32| 2147483647))) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_#length_117| (Array Int Int))) (= (store |v_#length_117| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (exists ((|v_#memory_$Pointer$.offset_136| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (exists ((|v_#valid_140| (Array Int Int))) (and (= (select |v_#valid_140| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= |#valid| (store |v_#valid_140| |ULTIMATE.start_create_#t~ret8#1.base| 1)))) (exists ((|v_#memory_$Pointer$.base_138| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)) |#memory_$Pointer$.base|)) (exists ((|v_#memory_int_113| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_113| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_113| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8)))))) (and (exists ((|v_old(#memory_int)_AFTER_CALL_48| (Array Int (Array Int Int))) (|v_old(#length)_AFTER_CALL_48| (Array Int Int)) (|v_ULTIMATE.start_create_#t~nondet7#1_32| Int) (|v_old(#valid)_AFTER_CALL_48| (Array Int Int)) (|v_old(#memory_$Pointer$.base)_AFTER_CALL_48| (Array Int (Array Int Int))) (|v_old(#memory_$Pointer$.offset)_AFTER_CALL_48| (Array Int (Array Int Int)))) (and (not (= |v_ULTIMATE.start_create_#t~nondet7#1_32| 0)) (<= 0 (+ |v_ULTIMATE.start_create_#t~nondet7#1_32| 2147483648)) (or (and (not (= |ULTIMATE.start_create_~data~0#1.base| 0)) (<= (+ |ULTIMATE.start_create_~data~0#1.base| 1) |#StackHeapBarrier|) (<= 1 |#StackHeapBarrier|) (exists ((|v_#memory_$Pointer$.offset_138| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_136| (Array Int (Array Int Int)))) (and (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_48| (store |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~now~0#1.base|) 0 0))) (= |v_#memory_$Pointer$.offset_138| (store (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.offset_138| |ULTIMATE.start_create_~data~0#1.base|) 0)))))) (not (= |ULTIMATE.start_create_~sll~0#1.base| 0)) (= |ULTIMATE.start_create_~sll~0#1.base| |ULTIMATE.start_create_~now~0#1.base|) (= |ULTIMATE.start_create_~now~0#1.offset| 0) (<= (+ |ULTIMATE.start_create_~sll~0#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#valid_140| (Array Int Int))) (and (= (select (store |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base|) 0) (= (select |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base|) 0) (= (store (store |v_#valid_140| |ULTIMATE.start_create_~sll~0#1.base| 1) |ULTIMATE.start_create_~data~0#1.base| 1) |v_old(#valid)_AFTER_CALL_48|))) (= |ULTIMATE.start_create_~sll~0#1.offset| 0) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#length_117| (Array Int Int))) (= |v_old(#length)_AFTER_CALL_48| (store (store |v_#length_117| |ULTIMATE.start_create_~sll~0#1.base| 16) |ULTIMATE.start_create_~data~0#1.base| 4))) (= |ULTIMATE.start_create_~data~0#1.offset| 0) (exists ((|v_#memory_$Pointer$.base_140| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_138| (Array Int (Array Int Int)))) (and (= (store (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base| (store (select (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_~sll~0#1.base|) 8 0)) |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_$Pointer$.base_140|) (= |v_old(#memory_$Pointer$.base)_AFTER_CALL_48| (store |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_$Pointer$.base_140| |ULTIMATE.start_create_~now~0#1.base|) 0 |ULTIMATE.start_create_~data~0#1.base|))))) (exists ((|v_#memory_int_114| (Array Int (Array Int Int))) (|v_#memory_int_115| (Array Int (Array Int Int))) (|v_#memory_int_113| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_114| |ULTIMATE.start_create_~data~0#1.base| (store (select |v_#memory_int_114| |ULTIMATE.start_create_~data~0#1.base|) 0 (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0))) |v_#memory_int_115|) (<= 0 (+ (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483648)) (<= (select (select |v_#memory_int_115| |ULTIMATE.start_create_~data~0#1.base|) 0) 2147483647) (= (store |v_#memory_int_113| |ULTIMATE.start_create_~sll~0#1.base| (store (select |v_#memory_int_113| |ULTIMATE.start_create_~sll~0#1.base|) 8 (select (select |v_#memory_int_114| |ULTIMATE.start_create_~sll~0#1.base|) 8))) |v_#memory_int_114|) (= |v_old(#memory_int)_AFTER_CALL_48| (store |v_#memory_int_115| |ULTIMATE.start_create_~now~0#1.base| (store (select |v_#memory_int_115| |ULTIMATE.start_create_~now~0#1.base|) 0 (select (select |v_old(#memory_int)_AFTER_CALL_48| |ULTIMATE.start_create_~now~0#1.base|) 0))))))) (and (exists ((|v_ULTIMATE.start_create_~now~0#1.base_45| Int) (|v_ULTIMATE.start_create_~now~0#1.offset_41| Int)) (and (= |ULTIMATE.start_create_~now~0#1.offset| (select (select |v_old(#memory_$Pointer$.offset)_AFTER_CALL_48| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|))) (= (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_48| |v_ULTIMATE.start_create_~now~0#1.base_45|) (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|)) |ULTIMATE.start_create_~now~0#1.base|) (<= 0 (+ 8 |v_ULTIMATE.start_create_~now~0#1.offset_41|)) (<= (+ 16 |v_ULTIMATE.start_create_~now~0#1.offset_41|) (select |v_old(#length)_AFTER_CALL_48| |v_ULTIMATE.start_create_~now~0#1.base_45|)) (= (select |v_old(#valid)_AFTER_CALL_48| |v_ULTIMATE.start_create_~now~0#1.base_45|) 1))) (exists ((|v_ULTIMATE.start_create_#t~mem9#1.base_28| Int) (|v_#memory_int_121| (Array Int (Array Int Int))) (|v_ULTIMATE.start_create_#t~mem9#1.offset_25| Int) (|v_#memory_$Pointer$.base_146| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_144| (Array Int (Array Int Int)))) (and (= |v_old(#memory_int)_AFTER_CALL_48| (store |v_#memory_int_121| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_int_121| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| (select (select |v_old(#memory_int)_AFTER_CALL_48| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25|)))) (= (store |v_#memory_$Pointer$.base_146| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_$Pointer$.base_146| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| |ULTIMATE.start_create_~data~0#1.base|)) |v_old(#memory_$Pointer$.base)_AFTER_CALL_48|) (<= (+ 8 |v_ULTIMATE.start_create_#t~mem9#1.offset_25|) (select |v_old(#length)_AFTER_CALL_48| |v_ULTIMATE.start_create_#t~mem9#1.base_28|)) (= 1 (select |v_old(#valid)_AFTER_CALL_48| |v_ULTIMATE.start_create_#t~mem9#1.base_28|)) (<= 0 |v_ULTIMATE.start_create_#t~mem9#1.offset_25|) (= |v_old(#memory_$Pointer$.offset)_AFTER_CALL_48| (store |v_#memory_$Pointer$.offset_144| |v_ULTIMATE.start_create_#t~mem9#1.base_28| (store (select |v_#memory_$Pointer$.offset_144| |v_ULTIMATE.start_create_#t~mem9#1.base_28|) |v_ULTIMATE.start_create_#t~mem9#1.offset_25| |ULTIMATE.start_create_~data~0#1.offset|))))))) (<= |v_ULTIMATE.start_create_#t~nondet7#1_32| 2147483647))) (<= (+ |ULTIMATE.start_create_#t~ret8#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_create_#t~ret8#1.base| 0)) (exists ((|v_#length_117| (Array Int Int))) (= (store |v_#length_117| |ULTIMATE.start_create_#t~ret8#1.base| 16) |#length|)) (exists ((|v_#memory_$Pointer$.offset_136| (Array Int (Array Int Int)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.offset_136| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)))) (exists ((|v_#valid_140| (Array Int Int))) (and (= (select |v_#valid_140| |ULTIMATE.start_create_#t~ret8#1.base|) 0) (= |#valid| (store |v_#valid_140| |ULTIMATE.start_create_#t~ret8#1.base| 1)))) (exists ((|v_#memory_$Pointer$.base_138| (Array Int (Array Int Int)))) (= (store |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_$Pointer$.base_138| |ULTIMATE.start_create_#t~ret8#1.base|) 8 0)) |#memory_$Pointer$.base|)) (exists ((|v_#memory_int_113| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_113| |ULTIMATE.start_create_#t~ret8#1.base| (store (select |v_#memory_int_113| |ULTIMATE.start_create_#t~ret8#1.base|) 8 (select (select |#memory_int| |ULTIMATE.start_create_#t~ret8#1.base|) 8))))))) (= |ULTIMATE.start_create_#t~ret8#1.offset| 0) (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 12:47:38,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:47:38,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:47:38,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2023-12-02 12:47:38,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849714388] [2023-12-02 12:47:38,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:47:38,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 12:47:38,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:47:38,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 12:47:38,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1139, Unknown=11, NotChecked=68, Total=1332 [2023-12-02 12:47:38,637 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:47:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:47:40,296 INFO L93 Difference]: Finished difference Result 80 states and 91 transitions. [2023-12-02 12:47:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 12:47:40,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2023-12-02 12:47:40,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:47:40,297 INFO L225 Difference]: With dead ends: 80 [2023-12-02 12:47:40,297 INFO L226 Difference]: Without dead ends: 80 [2023-12-02 12:47:40,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 65.8s TimeCoverageRelationStatistics Valid=205, Invalid=1758, Unknown=21, NotChecked=86, Total=2070 [2023-12-02 12:47:40,298 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 13 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:47:40,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 323 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 484 Invalid, 0 Unknown, 54 Unchecked, 0.6s Time] [2023-12-02 12:47:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-12-02 12:47:40,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-12-02 12:47:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.3709677419354838) internal successors, (85), 74 states have internal predecessors, (85), 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 12:47:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2023-12-02 12:47:40,302 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 25 [2023-12-02 12:47:40,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:47:40,302 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2023-12-02 12:47:40,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 17 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 12:47:40,302 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2023-12-02 12:47:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:47:40,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:47:40,303 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] [2023-12-02 12:47:40,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 12:47:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 12:47:40,504 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:47:40,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:47:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash -760601761, now seen corresponding path program 1 times [2023-12-02 12:47:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:47:40,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689030137] [2023-12-02 12:47:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:47:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:47:40,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:47:41,202 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 12:47:41,202 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:47:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689030137] [2023-12-02 12:47:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689030137] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:47:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653652474] [2023-12-02 12:47:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:47:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:47:41,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:47:41,203 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:47:41,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 12:47:41,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:47:41,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 51 conjunts are in the unsatisfiable core [2023-12-02 12:47:41,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:47:41,599 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-12-02 12:47:41,599 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 12:47:41,671 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 12:47:41,825 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 12:47:41,825 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 12:47:42,007 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 12:47:42,075 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 12:47:42,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:47:42,178 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1007 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1007) |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 12:47:42,277 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:47:42,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 25 [2023-12-02 12:47:42,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:47:42,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-12-02 12:47:42,293 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 9 treesize of output 5 [2023-12-02 12:47:42,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653652474] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:47:42,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [904957884] [2023-12-02 12:47:42,618 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:47:42,619 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:47:42,619 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:47:42,619 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:47:42,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:47:48,666 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:47:48,677 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:48:21,254 WARN L293 SmtUtils]: Spent 10.36s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:48:24,166 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5090#(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 12:48:24,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:48:24,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:48:24,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-12-02 12:48:24,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77500178] [2023-12-02 12:48:24,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:48:24,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 12:48:24,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:48:24,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 12:48:24,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2072, Unknown=15, NotChecked=92, Total=2352 [2023-12-02 12:48:24,169 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 29 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 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 12:48:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:48:24,915 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2023-12-02 12:48:24,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:48:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 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 26 [2023-12-02 12:48:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:48:24,916 INFO L225 Difference]: With dead ends: 87 [2023-12-02 12:48:24,916 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 12:48:24,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=205, Invalid=2334, Unknown=15, NotChecked=98, Total=2652 [2023-12-02 12:48:24,918 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 12:48:24,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 402 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 12:48:24,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 12:48:24,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2023-12-02 12:48:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 76 states have internal predecessors, (89), 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 12:48:24,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2023-12-02 12:48:24,921 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 26 [2023-12-02 12:48:24,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:48:24,921 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2023-12-02 12:48:24,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 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 12:48:24,921 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2023-12-02 12:48:24,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 12:48:24,922 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:48:24,922 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] [2023-12-02 12:48:24,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 12:48:25,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 12:48:25,122 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:48:25,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:48:25,123 INFO L85 PathProgramCache]: Analyzing trace with hash -760601760, now seen corresponding path program 1 times [2023-12-02 12:48:25,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:48:25,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200604098] [2023-12-02 12:48:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:25,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:48:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:48:26,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:48:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200604098] [2023-12-02 12:48:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200604098] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788943344] [2023-12-02 12:48:26,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:48:26,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:48:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:48:26,119 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:48:26,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 12:48:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:48:26,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 62 conjunts are in the unsatisfiable core [2023-12-02 12:48:26,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:48:26,631 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:48:26,631 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 12:48:26,706 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 13 treesize of output 9 [2023-12-02 12:48:26,734 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 12:48:26,912 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 12:48:26,913 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 12:48:26,918 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 12:48:27,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:48:27,213 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 12:48:27,218 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:48:27,219 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 19 treesize of output 7 [2023-12-02 12:48:27,272 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 12:48:27,272 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:48:27,500 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1097) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1098) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0)))) (forall ((v_ArrVal_1097 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_create_#t~mem9#1.base| v_ArrVal_1097) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse0))))) is different from false [2023-12-02 12:48:27,516 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) (+ 8 |c_ULTIMATE.start_create_~now~0#1.offset|))) (.cse1 (+ |c_ULTIMATE.start_create_~sll~0#1.offset| 8))) (and (forall ((v_ArrVal_1097 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1097) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1))) (forall ((v_ArrVal_1098 (Array Int Int)) (v_ArrVal_1097 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_1097) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1098) |c_ULTIMATE.start_create_~sll~0#1.base|) .cse1)))))) is different from false [2023-12-02 12:48:27,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:48:27,528 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 22 treesize of output 23 [2023-12-02 12:48:27,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:48:27,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2023-12-02 12:48:27,560 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 3 [2023-12-02 12:48:27,569 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:48:27,569 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 45 treesize of output 46 [2023-12-02 12:48:27,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:48:27,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2023-12-02 12:48:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:48:27,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:48:27,587 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 33 treesize of output 21 [2023-12-02 12:48:27,590 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:48:27,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:48:27,594 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 24 treesize of output 12 [2023-12-02 12:48:27,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 12:48:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788943344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:48:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770822581] [2023-12-02 12:48:27,824 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 12:48:27,824 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:48:27,824 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:48:27,824 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:48:27,824 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:48:33,784 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:48:33,790 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:49:14,482 WARN L293 SmtUtils]: Spent 10.18s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:49:19,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5430#(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 12:49:19,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:49:19,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:49:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-12-02 12:49:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022040726] [2023-12-02 12:49:19,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:49:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 12:49:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:49:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 12:49:19,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2176, Unknown=5, NotChecked=190, Total=2550 [2023-12-02 12:49:19,184 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 30 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 12:49:20,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:49:20,345 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2023-12-02 12:49:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 12:49:20,345 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 26 [2023-12-02 12:49:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:49:20,346 INFO L225 Difference]: With dead ends: 84 [2023-12-02 12:49:20,346 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 12:49:20,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 47.2s TimeCoverageRelationStatistics Valid=238, Invalid=2735, Unknown=5, NotChecked=214, Total=3192 [2023-12-02 12:49:20,347 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 10 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:49:20,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 501 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:49:20,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 12:49:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2023-12-02 12:49:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3692307692307693) internal successors, (89), 77 states have internal predecessors, (89), 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 12:49:20,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-12-02 12:49:20,350 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 26 [2023-12-02 12:49:20,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:49:20,350 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-12-02 12:49:20,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 12:49:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-12-02 12:49:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:49:20,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:49:20,351 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 12:49:20,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 12:49:20,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 12:49:20,551 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:49:20,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:49:20,552 INFO L85 PathProgramCache]: Analyzing trace with hash -2103746454, now seen corresponding path program 1 times [2023-12-02 12:49:20,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:49:20,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514357100] [2023-12-02 12:49:20,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:20,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:49:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:49:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:49:20,856 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:49:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514357100] [2023-12-02 12:49:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514357100] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:49:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984450069] [2023-12-02 12:49:20,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:49:20,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:49:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:49:20,858 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:49:20,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 12:49:20,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:49:20,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 12:49:20,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:49:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:49:21,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:49:21,241 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:49:21,241 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 12:49:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:49:21,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984450069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:49:21,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764371289] [2023-12-02 12:49:21,464 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 12:49:21,464 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:49:21,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:49:21,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:49:21,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:49:27,511 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:49:27,518 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:49:56,309 WARN L293 SmtUtils]: Spent 9.89s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:50:00,188 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5800#(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 12:50:00,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:50:00,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:50:00,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2023-12-02 12:50:00,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335884830] [2023-12-02 12:50:00,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:50:00,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 12:50:00,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:50:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 12:50:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1203, Unknown=3, NotChecked=0, Total=1332 [2023-12-02 12:50:00,190 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 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 12:50:01,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:50:01,002 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2023-12-02 12:50:01,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:50:01,003 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 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 12:50:01,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:50:01,003 INFO L225 Difference]: With dead ends: 131 [2023-12-02 12:50:01,003 INFO L226 Difference]: Without dead ends: 131 [2023-12-02 12:50:01,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 33.2s TimeCoverageRelationStatistics Valid=155, Invalid=1482, Unknown=3, NotChecked=0, Total=1640 [2023-12-02 12:50:01,004 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 12:50:01,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 370 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 12:50:01,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-12-02 12:50:01,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2023-12-02 12:50:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 71 states have (on average 1.380281690140845) internal successors, (98), 83 states have internal predecessors, (98), 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 12:50:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2023-12-02 12:50:01,008 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 27 [2023-12-02 12:50:01,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:50:01,008 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2023-12-02 12:50:01,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.111111111111111) internal successors, (56), 19 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 12:50:01,008 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2023-12-02 12:50:01,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:50:01,009 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:50:01,009 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 12:50:01,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 12:50:01,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:01,210 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:50:01,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:50:01,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1327260707, now seen corresponding path program 1 times [2023-12-02 12:50:01,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:50:01,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346380186] [2023-12-02 12:50:01,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:01,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:50:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:50:01,707 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 12:50:01,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:50:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346380186] [2023-12-02 12:50:01,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346380186] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:50:01,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746019370] [2023-12-02 12:50:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:01,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:50:01,709 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:50:01,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 12:50:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:50:01,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 12:50:01,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:50:02,191 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 12:50:02,623 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:50:02,623 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 82 treesize of output 58 [2023-12-02 12:50:04,172 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_destroy_#t~mem13#1.base_18| Int) (|v_ULTIMATE.start_destroy_~l#1.base_30| Int) (v_DerPreprocessor_3 Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_30| 1))) (and (= (select (store .cse0 |v_ULTIMATE.start_destroy_#t~mem13#1.base_18| 0) |v_ULTIMATE.start_destroy_~l#1.base_30|) 1) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_30|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_#t~mem13#1.base_18| 0) |v_ULTIMATE.start_destroy_~l#1.base_30| 0)) (= 0 (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_destroy_~l#1.base_30| (select (store .cse0 |v_ULTIMATE.start_destroy_#t~mem13#1.base_18| v_DerPreprocessor_3) |v_ULTIMATE.start_destroy_~l#1.base_30|)) |v_ULTIMATE.start_destroy_#t~mem13#1.base_18|))))) is different from true [2023-12-02 12:50:04,191 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 12:50:04,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:50:04,773 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 88 treesize of output 80 [2023-12-02 12:50:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746019370] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:50:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1893647096] [2023-12-02 12:50:05,611 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 12:50:05,612 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:50:05,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:50:05,612 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:50:05,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:50:06,826 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 12:50:06,835 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:50:26,810 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6225#(and (not (= |ULTIMATE.start_create_#res#1.base| 0)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~l~0#1.offset| 0) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) 0)) (exists ((|v_#length_160| (Array Int Int))) (= |#length| (store (store |v_#length_160| |ULTIMATE.start_create_#res#1.base| 16) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) 4))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ |ULTIMATE.start_main_~l~0#1.base| 1) |#StackHeapBarrier|) (= |ULTIMATE.start_create_#res#1.offset| 0) (exists ((|v_#valid_196| (Array Int Int))) (and (= (select |v_#valid_196| |ULTIMATE.start_create_#res#1.base|) 0) (= (store (store (store (store |v_#valid_196| |ULTIMATE.start_create_#res#1.base| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~l~0#1.base|) 0) 0) |ULTIMATE.start_main_~l~0#1.base| 0) |#valid|) (= (select (store |v_#valid_196| |ULTIMATE.start_create_#res#1.base| 1) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0))) (exists ((|v_#memory_int_190| (Array Int (Array Int Int))) (|v_#memory_int_188| (Array Int (Array Int Int))) (|v_#memory_int_189| (Array Int (Array Int Int)))) (and (<= 0 (+ (select (select |v_#memory_int_190| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0) 2147483648)) (= (store |v_#memory_int_188| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_188| |ULTIMATE.start_create_#res#1.base|) 8 (select (select |v_#memory_int_189| |ULTIMATE.start_create_#res#1.base|) 8))) |v_#memory_int_189|) (<= (select (select |v_#memory_int_190| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0) 2147483647) (= |#memory_int| (store |v_#memory_int_190| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_int_190| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |#memory_int| |ULTIMATE.start_create_#res#1.base|) 0)))) (= (store |v_#memory_int_189| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) (store (select |v_#memory_int_189| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0 (select (select |v_#memory_int_190| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0))) |v_#memory_int_190|))) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (exists ((|v_#memory_$Pointer$.base_218| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_220| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_220| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_220| |ULTIMATE.start_create_#res#1.base|) 0 (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0))) |#memory_$Pointer$.base|) (= (store (store |v_#memory_$Pointer$.base_218| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_218| |ULTIMATE.start_create_#res#1.base|) 8 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) (store (select (store |v_#memory_$Pointer$.base_218| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.base_218| |ULTIMATE.start_create_#res#1.base|) 8 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0 (select (select |v_#memory_$Pointer$.base_220| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0))) |v_#memory_$Pointer$.base_220|))) (exists ((|v_#memory_$Pointer$.offset_215| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_213| (Array Int (Array Int Int)))) (and (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_215| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_215| |ULTIMATE.start_create_#res#1.base|) 0 0))) (= (store (store |v_#memory_$Pointer$.offset_213| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_213| |ULTIMATE.start_create_#res#1.base|) 8 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) (store (select (store |v_#memory_$Pointer$.offset_213| |ULTIMATE.start_create_#res#1.base| (store (select |v_#memory_$Pointer$.offset_213| |ULTIMATE.start_create_#res#1.base|) 8 0)) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0 (select (select |v_#memory_$Pointer$.offset_215| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0)) 0))) |v_#memory_$Pointer$.offset_215|))) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_create_#res#1.base|) (<= (+ (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_#res#1.base|) 0) 1) |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2023-12-02 12:50:26,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:50:26,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:50:26,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2023-12-02 12:50:26,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128474930] [2023-12-02 12:50:26,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:50:26,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 12:50:26,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:50:26,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 12:50:26,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2411, Unknown=4, NotChecked=98, Total=2652 [2023-12-02 12:50:26,812 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 12:50:33,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:50:33,475 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2023-12-02 12:50:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 12:50:33,476 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 27 [2023-12-02 12:50:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:50:33,476 INFO L225 Difference]: With dead ends: 100 [2023-12-02 12:50:33,477 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 12:50:33,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=231, Invalid=3429, Unknown=4, NotChecked=118, Total=3782 [2023-12-02 12:50:33,478 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 74 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 12:50:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 720 Invalid, 1 Unknown, 74 Unchecked, 2.4s Time] [2023-12-02 12:50:33,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 12:50:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 90. [2023-12-02 12:50:33,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 72 states have (on average 1.375) internal successors, (99), 84 states have internal predecessors, (99), 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 12:50:33,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 105 transitions. [2023-12-02 12:50:33,481 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 105 transitions. Word has length 27 [2023-12-02 12:50:33,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:50:33,482 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 105 transitions. [2023-12-02 12:50:33,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 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 12:50:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 105 transitions. [2023-12-02 12:50:33,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 12:50:33,482 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:50:33,482 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] [2023-12-02 12:50:33,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 12:50:33,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:33,683 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:50:33,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:50:33,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1327261930, now seen corresponding path program 1 times [2023-12-02 12:50:33,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:50:33,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591430139] [2023-12-02 12:50:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:33,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:50:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:50:34,120 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 12:50:34,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:50:34,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591430139] [2023-12-02 12:50:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591430139] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:50:34,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716643038] [2023-12-02 12:50:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:50:34,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:50:34,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:50:34,122 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:50:34,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 12:50:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:50:34,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 12:50:34,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:50:34,340 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 12:50:34,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-12-02 12:50:34,681 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:50:34,681 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 12:50:34,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:50:34,695 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 12:50:34,769 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 12:50:34,769 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:50:35,402 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 12:50:35,403 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 12:50:35,411 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:50:35,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 60 [2023-12-02 12:50:35,419 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:50:35,420 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 60 treesize of output 54 [2023-12-02 12:50:35,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 12:50:35,428 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 12:50:35,613 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 12:50:35,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716643038] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:50:35,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091847394] [2023-12-02 12:50:35,615 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 12:50:35,615 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:50:35,615 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:50:35,615 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:50:35,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:50:36,817 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 22 for LOIs [2023-12-02 12:50:36,824 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:50:50,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1091847394] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:50:50,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:50:50,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [12, 15, 15] total 45 [2023-12-02 12:50:50,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563096219] [2023-12-02 12:50:50,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:50:50,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 12:50:50,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:50:50,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 12:50:50,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1787, Unknown=2, NotChecked=0, Total=1980 [2023-12-02 12:50:50,994 INFO L87 Difference]: Start difference. First operand 90 states and 105 transitions. Second operand has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 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 12:50:53,472 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 12:50:55,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 12:50:57,623 WARN L539 Checker$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 12:50:59,780 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 12:51:03,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:03,246 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2023-12-02 12:51:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 12:51:03,247 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 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 27 [2023-12-02 12:51:03,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:03,248 INFO L225 Difference]: With dead ends: 96 [2023-12-02 12:51:03,248 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 12:51:03,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=191, Invalid=1787, Unknown=2, NotChecked=0, Total=1980 [2023-12-02 12:51:03,249 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 5 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:03,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 578 Invalid, 5 Unknown, 0 Unchecked, 12.2s Time] [2023-12-02 12:51:03,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 12:51:03,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2023-12-02 12:51:03,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.358974358974359) internal successors, (106), 90 states have internal predecessors, (106), 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 12:51:03,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 112 transitions. [2023-12-02 12:51:03,254 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 112 transitions. Word has length 27 [2023-12-02 12:51:03,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:03,254 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 112 transitions. [2023-12-02 12:51:03,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 1.6) internal successors, (24), 15 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 12:51:03,254 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 112 transitions. [2023-12-02 12:51:03,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-02 12:51:03,255 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:03,255 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 12:51:03,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 12:51:03,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-12-02 12:51:03,456 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:51:03,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash -791630617, now seen corresponding path program 1 times [2023-12-02 12:51:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:03,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977830332] [2023-12-02 12:51:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:51:04,133 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977830332] [2023-12-02 12:51:04,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977830332] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110140974] [2023-12-02 12:51:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:04,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:04,134 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:04,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 12:51:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:04,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-02 12:51:04,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:04,454 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 12:51:04,681 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 12:51:04,681 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 12:51:04,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-12-02 12:51:04,714 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:51:04,715 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 12:51:04,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:51:04,808 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 11 [2023-12-02 12:51:04,820 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 12:51:04,908 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 12:51:04,975 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 12:51:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:51:05,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:51:05,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110140974] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:05,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1426823568] [2023-12-02 12:51:05,903 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 12:51:05,903 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:51:05,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:51:05,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:51:05,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:51:11,982 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:51:11,990 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:51:26,003 WARN L293 SmtUtils]: Spent 5.18s on a formula simplification. DAG size of input: 283 DAG size of output: 260 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:52,652 WARN L293 SmtUtils]: Spent 12.71s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:51:58,797 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7007#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_destroy_#t~mem13#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)) (not (= |ULTIMATE.start_destroy_#t~mem13#1.offset| 0)) (<= 0 |ULTIMATE.start_destroy_~l#1.offset|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= |ULTIMATE.start_destroy_#t~mem13#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)) (= (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|)))' at error location [2023-12-02 12:51:58,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:51:58,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:51:58,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2023-12-02 12:51:58,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561008690] [2023-12-02 12:51:58,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:51:58,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 12:51:58,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 12:51:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2372, Unknown=8, NotChecked=0, Total=2550 [2023-12-02 12:51:58,800 INFO L87 Difference]: Start difference. First operand 96 states and 112 transitions. Second operand has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 12:52:00,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:00,235 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2023-12-02 12:52:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 12:52:00,236 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 12:52:00,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:00,237 INFO L225 Difference]: With dead ends: 117 [2023-12-02 12:52:00,237 INFO L226 Difference]: Without dead ends: 117 [2023-12-02 12:52:00,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 49.0s TimeCoverageRelationStatistics Valid=254, Invalid=3159, Unknown=9, NotChecked=0, Total=3422 [2023-12-02 12:52:00,239 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:00,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 365 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 12:52:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-02 12:52:00,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 96. [2023-12-02 12:52:00,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.3461538461538463) internal successors, (105), 90 states have internal predecessors, (105), 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 12:52:00,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 111 transitions. [2023-12-02 12:52:00,244 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 111 transitions. Word has length 28 [2023-12-02 12:52:00,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:00,244 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 111 transitions. [2023-12-02 12:52:00,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 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 12:52:00,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 111 transitions. [2023-12-02 12:52:00,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:52:00,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:00,245 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] [2023-12-02 12:52:00,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 12:52:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 12:52:00,445 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:52:00,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1229254761, now seen corresponding path program 1 times [2023-12-02 12:52:00,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:52:00,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304010427] [2023-12-02 12:52:00,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:00,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:52:00,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:52:01,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:52:01,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304010427] [2023-12-02 12:52:01,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304010427] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:01,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396982965] [2023-12-02 12:52:01,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:01,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:01,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:01,145 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:01,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 12:52:01,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:01,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-02 12:52:01,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:01,456 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 12:52:01,600 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 12:52:01,656 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:52:01,657 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 12:52:01,699 WARN L854 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_create_~sll~0#1.base| |c_ULTIMATE.start_create_~now~0#1.base|) (<= 0 |c_ULTIMATE.start_create_~now~0#1.offset|) (not (= |c_ULTIMATE.start_create_#t~ret8#1.base| |c_ULTIMATE.start_create_~now~0#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_96| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_#memory_$Pointer$.base|))) (and (<= (+ (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) 1) |c_#StackHeapBarrier|) (= .cse0 |c_ULTIMATE.start_create_#t~ret8#1.base|) (= (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| .cse0 (select |c_#memory_$Pointer$.base| .cse0)) |c_#memory_$Pointer$.base|)))) (< (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) |c_#StackHeapBarrier|)) (= |c_ULTIMATE.start_create_~sll~0#1.offset| |c_ULTIMATE.start_create_~now~0#1.offset|) (<= |c_ULTIMATE.start_create_~sll~0#1.offset| 0)) is different from false [2023-12-02 12:52:01,703 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_create_~sll~0#1.base| |c_ULTIMATE.start_create_~now~0#1.base|) (<= 0 |c_ULTIMATE.start_create_~now~0#1.offset|) (not (= |c_ULTIMATE.start_create_#t~ret8#1.base| |c_ULTIMATE.start_create_~now~0#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_96| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_#memory_$Pointer$.base|))) (and (<= (+ (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) 1) |c_#StackHeapBarrier|) (= .cse0 |c_ULTIMATE.start_create_#t~ret8#1.base|) (= (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| .cse0 (select |c_#memory_$Pointer$.base| .cse0)) |c_#memory_$Pointer$.base|)))) (< (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) |c_#StackHeapBarrier|)) (= |c_ULTIMATE.start_create_~sll~0#1.offset| |c_ULTIMATE.start_create_~now~0#1.offset|) (<= |c_ULTIMATE.start_create_~sll~0#1.offset| 0)) is different from true [2023-12-02 12:52:01,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:01,723 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 12:52:01,911 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 12:52:01,912 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 34 treesize of output 33 [2023-12-02 12:52:02,200 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:52:02,201 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 12:52:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 12:52:02,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:52:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396982965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1584869503] [2023-12-02 12:52:02,955 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2023-12-02 12:52:02,955 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:52:02,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 12:52:02,956 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 12:52:02,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 12:52:08,966 INFO L197 IcfgInterpreter]: Interpreting procedure alloc_and_zero with input of size 1 for LOIs [2023-12-02 12:52:08,973 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 12:52:46,374 WARN L293 SmtUtils]: Spent 13.17s on a formula simplification. DAG size of input: 308 DAG size of output: 285 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 12:52:51,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7418#(and (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_main_~l~0#1.offset|) (= |ULTIMATE.start_destroy_#t~mem13#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|)) (<= 0 |ULTIMATE.start_destroy_~l#1.offset|) (<= |#StackHeapBarrier| |ULTIMATE.start_destroy_#t~mem13#1.base|) (= |ULTIMATE.start_main_~l~0#1.base| |ULTIMATE.start_destroy_#in~l#1.base|) (= |ULTIMATE.start_destroy_#in~l#1.offset| |ULTIMATE.start_destroy_~l#1.offset|) (or (not (= |ULTIMATE.start_destroy_~l#1.base| 0)) (not (= |ULTIMATE.start_destroy_~l#1.offset| 0))) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_destroy_~l#1.base|) |ULTIMATE.start_destroy_~l#1.offset|) 0) (= (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_#t~mem13#1.offset| 0) (<= (+ |ULTIMATE.start_destroy_~l#1.offset| 8) (select |#length| |ULTIMATE.start_destroy_~l#1.base|)))' at error location [2023-12-02 12:52:51,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 12:52:51,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 12:52:51,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2023-12-02 12:52:51,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849768076] [2023-12-02 12:52:51,546 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 12:52:51,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 12:52:51,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:52:51,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 12:52:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2279, Unknown=7, NotChecked=96, Total=2550 [2023-12-02 12:52:51,548 INFO L87 Difference]: Start difference. First operand 96 states and 111 transitions. Second operand has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 12:52:52,129 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (= |c_ULTIMATE.start_create_~sll~0#1.base| |c_ULTIMATE.start_create_~now~0#1.base|) (<= 0 |c_ULTIMATE.start_create_~now~0#1.offset|) (not (= |c_ULTIMATE.start_create_#t~ret8#1.base| |c_ULTIMATE.start_create_~now~0#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_96| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_#memory_$Pointer$.base|))) (and (<= (+ (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) 1) |c_#StackHeapBarrier|) (= .cse0 |c_ULTIMATE.start_create_#t~ret8#1.base|) (= (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| .cse0 (select |c_#memory_$Pointer$.base| .cse0)) |c_#memory_$Pointer$.base|)))) (< .cse1 |c_#StackHeapBarrier|)) (= |c_ULTIMATE.start_create_~sll~0#1.offset| |c_ULTIMATE.start_create_~now~0#1.offset|) (<= (+ |c_ULTIMATE.start_create_~data~0#1.base| 1) |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_create_~sll~0#1.offset| 0) (= |c_ULTIMATE.start_create_~data~0#1.base| .cse1))) is different from false [2023-12-02 12:52:52,134 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|))) (and (= |c_ULTIMATE.start_create_~sll~0#1.base| |c_ULTIMATE.start_create_~now~0#1.base|) (<= 0 |c_ULTIMATE.start_create_~now~0#1.offset|) (not (= |c_ULTIMATE.start_create_#t~ret8#1.base| |c_ULTIMATE.start_create_~now~0#1.base|)) (or (exists ((|v_old(#memory_$Pointer$.base)_AFTER_CALL_96| (Array Int (Array Int Int)))) (let ((.cse0 (@diff |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_#memory_$Pointer$.base|))) (and (<= (+ (select (select |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| |c_ULTIMATE.start_create_~now~0#1.base|) |c_ULTIMATE.start_create_~now~0#1.offset|) 1) |c_#StackHeapBarrier|) (= .cse0 |c_ULTIMATE.start_create_#t~ret8#1.base|) (= (store |v_old(#memory_$Pointer$.base)_AFTER_CALL_96| .cse0 (select |c_#memory_$Pointer$.base| .cse0)) |c_#memory_$Pointer$.base|)))) (< .cse1 |c_#StackHeapBarrier|)) (= |c_ULTIMATE.start_create_~sll~0#1.offset| |c_ULTIMATE.start_create_~now~0#1.offset|) (<= (+ |c_ULTIMATE.start_create_~data~0#1.base| 1) |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_create_~sll~0#1.offset| 0) (= |c_ULTIMATE.start_create_~data~0#1.base| .cse1))) is different from true [2023-12-02 12:52:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:52:53,783 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2023-12-02 12:52:53,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:52:53,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-12-02 12:52:53,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:52:53,784 INFO L225 Difference]: With dead ends: 118 [2023-12-02 12:52:53,784 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 12:52:53,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 45.0s TimeCoverageRelationStatistics Valid=271, Invalid=3268, Unknown=9, NotChecked=234, Total=3782 [2023-12-02 12:52:53,786 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 91 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 12:52:53,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 398 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 854 Invalid, 0 Unknown, 135 Unchecked, 1.2s Time] [2023-12-02 12:52:53,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 12:52:53,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 96. [2023-12-02 12:52:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 90 states have internal predecessors, (104), 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 12:52:53,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 110 transitions. [2023-12-02 12:52:53,791 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 110 transitions. Word has length 29 [2023-12-02 12:52:53,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:52:53,791 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 110 transitions. [2023-12-02 12:52:53,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 22 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 12:52:53,791 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 110 transitions. [2023-12-02 12:52:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 12:52:53,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:52:53,792 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:52:53,798 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 12:52:53,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-12-02 12:52:53,993 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2023-12-02 12:52:53,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:52:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1162478973, now seen corresponding path program 2 times [2023-12-02 12:52:53,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:52:53,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957611769] [2023-12-02 12:52:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:52:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:52:54,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:52:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:55,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:52:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957611769] [2023-12-02 12:52:55,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957611769] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:52:55,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58423912] [2023-12-02 12:52:55,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:52:55,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:52:55,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:52:55,295 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:52:55,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f742d084-6fd6-478b-8d9b-d02f0f764a5f/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 12:52:55,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 12:52:55,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:52:55,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-02 12:52:55,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:52:55,547 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 12:52:55,561 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 12:52:55,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:55,735 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 12:52:55,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:52:55,748 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 12:52:56,034 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 12:52:56,046 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 12:52:56,160 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 12:52:56,161 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 12:52:56,174 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 12:52:56,301 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 33 treesize of output 17 [2023-12-02 12:52:56,314 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 27 treesize of output 26 [2023-12-02 12:52:56,340 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 12:52:56,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:56,509 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 12:52:56,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 58 [2023-12-02 12:52:56,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 12:52:56,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 25 [2023-12-02 12:52:57,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:52:57,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:53:04,188 INFO L349 Elim1Store]: treesize reduction 1482, result has 47.2 percent of original size [2023-12-02 12:53:04,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 2724 treesize of output 3156 [2023-12-02 12:53:05,137 INFO L349 Elim1Store]: treesize reduction 204, result has 39.5 percent of original size [2023-12-02 12:53:05,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 4741 treesize of output 4043 [2023-12-02 12:53:05,564 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:05,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 3161 treesize of output 3251 [2023-12-02 12:53:11,854 WARN L293 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 411 DAG size of output: 272 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-02 12:53:11,855 INFO L349 Elim1Store]: treesize reduction 1592, result has 44.8 percent of original size [2023-12-02 12:53:11,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 15 new quantified variables, introduced 68 case distinctions, treesize of input 22777 treesize of output 12385 [2023-12-02 12:53:13,943 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:53:13,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 9910 treesize of output 9736 [2023-12-02 12:57:42,473 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 12:57:43,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-12-02 12:57:44,679 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 12:57:44,680 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 29 treesize of output 31