./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/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_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/prefixsum_iter.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/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 32bit --witnessprinter.graph.data.programhash 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:31:27,919 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:31:27,985 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 18:31:27,990 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:31:27,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:31:28,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:31:28,015 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:31:28,016 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:31:28,016 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:31:28,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:31:28,017 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:31:28,018 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:31:28,018 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:31:28,019 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:31:28,019 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:31:28,020 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:31:28,020 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:31:28,021 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:31:28,021 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:31:28,021 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:31:28,022 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:31:28,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:31:28,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:31:28,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:31:28,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:31:28,025 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:31:28,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:31:28,026 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:31:28,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:31:28,026 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:31:28,027 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:31:28,027 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:31:28,027 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:31:28,027 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:31:28,028 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:31:28,028 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:31:28,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:31:28,028 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:31:28,028 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:31:28,029 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:31:28,029 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:31:28,029 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:31:28,029 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:31:28,030 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:31:28,030 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:31:28,030 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:31:28,030 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:31:28,030 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:31:28,030 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_c00e05d7-6782-4245-8ce9-7ab3be2b6477/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2023-12-02 18:31:28,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:31:28,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:31:28,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:31:28,297 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:31:28,297 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:31:28,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-12-02 18:31:31,032 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:31:31,201 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:31:31,201 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/sv-benchmarks/c/verifythis/prefixsum_iter.c [2023-12-02 18:31:31,208 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/data/5041aa6f7/9799ac27c0bf4cfdb3935ca93f5fdeb3/FLAG4243f4d7b [2023-12-02 18:31:31,222 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/data/5041aa6f7/9799ac27c0bf4cfdb3935ca93f5fdeb3 [2023-12-02 18:31:31,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:31:31,227 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:31:31,228 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:31:31,228 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:31:31,234 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:31:31,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,236 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cae801e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31, skipping insertion in model container [2023-12-02 18:31:31,236 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,260 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:31:31,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:31:31,434 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:31:31,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:31:31,477 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:31:31,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31 WrapperNode [2023-12-02 18:31:31,478 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:31:31,479 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:31:31,479 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:31:31,479 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:31:31,487 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,497 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,524 INFO L138 Inliner]: procedures = 22, calls = 34, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 136 [2023-12-02 18:31:31,524 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:31:31,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:31:31,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:31:31,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:31:31,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,533 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,538 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,538 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,547 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,552 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,555 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,556 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,560 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:31:31,561 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:31:31,561 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:31:31,561 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:31:31,562 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (1/1) ... [2023-12-02 18:31:31,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:31:31,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:31:31,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:31:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:31:31,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:31:31,640 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-02 18:31:31,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-02 18:31:31,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 18:31:31,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 18:31:31,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:31:31,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:31:31,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:31:31,642 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 18:31:31,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-12-02 18:31:31,642 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-12-02 18:31:31,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:31:31,734 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:31:31,736 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:31:32,098 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:31:32,179 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:31:32,180 INFO L309 CfgBuilder]: Removed 7 assume(true) statements. [2023-12-02 18:31:32,181 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:31:32 BoogieIcfgContainer [2023-12-02 18:31:32,182 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:31:32,185 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:31:32,185 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:31:32,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:31:32,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:31:31" (1/3) ... [2023-12-02 18:31:32,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8b733d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:31:32, skipping insertion in model container [2023-12-02 18:31:32,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:31:31" (2/3) ... [2023-12-02 18:31:32,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b8b733d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:31:32, skipping insertion in model container [2023-12-02 18:31:32,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:31:32" (3/3) ... [2023-12-02 18:31:32,192 INFO L112 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2023-12-02 18:31:32,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:31:32,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2023-12-02 18:31:32,258 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:31:32,265 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;@72b177e5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:31:32,265 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2023-12-02 18:31:32,270 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 18:31:32,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:32,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:32,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1400246135, now seen corresponding path program 1 times [2023-12-02 18:31:32,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:32,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337029627] [2023-12-02 18:31:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:32,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:32,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337029627] [2023-12-02 18:31:32,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337029627] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:32,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:32,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:31:32,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252525473] [2023-12-02 18:31:32,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:32,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:31:32,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:32,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:31:32,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:31:32,764 INFO L87 Difference]: Start difference. First operand has 78 states, 37 states have (on average 2.135135135135135) internal successors, (79), 71 states have internal predecessors, (79), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:32,899 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2023-12-02 18:31:32,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:31:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 20 [2023-12-02 18:31:32,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:32,908 INFO L225 Difference]: With dead ends: 76 [2023-12-02 18:31:32,908 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 18:31:32,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:31:32,913 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 116 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:32,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 63 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:31:32,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 18:31:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 18:31:32,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 68 states have internal predecessors, (75), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2023-12-02 18:31:32,951 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 20 [2023-12-02 18:31:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:32,952 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2023-12-02 18:31:32,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:32,953 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2023-12-02 18:31:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 18:31:32,954 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:32,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:32,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 18:31:32,955 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:32,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1400246134, now seen corresponding path program 1 times [2023-12-02 18:31:32,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:32,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297253017] [2023-12-02 18:31:32,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:32,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:33,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:33,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:33,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297253017] [2023-12-02 18:31:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297253017] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:33,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:33,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:31:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795844647] [2023-12-02 18:31:33,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:33,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:31:33,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:31:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:31:33,453 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:34,260 INFO L93 Difference]: Finished difference Result 201 states and 223 transitions. [2023-12-02 18:31:34,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:31:34,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-12-02 18:31:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:34,264 INFO L225 Difference]: With dead ends: 201 [2023-12-02 18:31:34,264 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 18:31:34,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:31:34,266 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 580 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:34,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 193 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:31:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 18:31:34,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 106. [2023-12-02 18:31:34,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 96 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 151 transitions. [2023-12-02 18:31:34,282 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 151 transitions. Word has length 20 [2023-12-02 18:31:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:34,283 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 151 transitions. [2023-12-02 18:31:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 151 transitions. [2023-12-02 18:31:34,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:31:34,284 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:34,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 18:31:34,285 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:34,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:34,286 INFO L85 PathProgramCache]: Analyzing trace with hash -457957218, now seen corresponding path program 1 times [2023-12-02 18:31:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613996529] [2023-12-02 18:31:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:34,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:34,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:34,357 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:34,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:34,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613996529] [2023-12-02 18:31:34,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613996529] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:34,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:34,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:31:34,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980847706] [2023-12-02 18:31:34,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:34,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:31:34,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:34,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:31:34,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:31:34,360 INFO L87 Difference]: Start difference. First operand 106 states and 151 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:31:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:34,449 INFO L93 Difference]: Finished difference Result 105 states and 149 transitions. [2023-12-02 18:31:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:31:34,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-12-02 18:31:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:34,452 INFO L225 Difference]: With dead ends: 105 [2023-12-02 18:31:34,452 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 18:31:34,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:31:34,454 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:34,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 67 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:31:34,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 18:31:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 18:31:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 65 states have (on average 2.076923076923077) internal successors, (135), 95 states have internal predecessors, (135), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 149 transitions. [2023-12-02 18:31:34,465 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 149 transitions. Word has length 21 [2023-12-02 18:31:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 149 transitions. [2023-12-02 18:31:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:31:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 149 transitions. [2023-12-02 18:31:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:31:34,467 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:34,467 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:34,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 18:31:34,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:34,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:34,469 INFO L85 PathProgramCache]: Analyzing trace with hash -457957217, now seen corresponding path program 1 times [2023-12-02 18:31:34,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:34,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934002509] [2023-12-02 18:31:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:34,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:34,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:34,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934002509] [2023-12-02 18:31:34,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934002509] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:34,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:34,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:31:34,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306769600] [2023-12-02 18:31:34,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:34,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:31:34,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:34,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:31:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:31:34,764 INFO L87 Difference]: Start difference. First operand 105 states and 149 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:35,209 INFO L93 Difference]: Finished difference Result 181 states and 258 transitions. [2023-12-02 18:31:35,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:31:35,209 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-12-02 18:31:35,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:35,211 INFO L225 Difference]: With dead ends: 181 [2023-12-02 18:31:35,211 INFO L226 Difference]: Without dead ends: 181 [2023-12-02 18:31:35,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:31:35,213 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 299 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:35,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 66 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:31:35,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-12-02 18:31:35,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 107. [2023-12-02 18:31:35,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 68 states have (on average 2.014705882352941) internal successors, (137), 97 states have internal predecessors, (137), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2023-12-02 18:31:35,224 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 21 [2023-12-02 18:31:35,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:35,225 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2023-12-02 18:31:35,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,225 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2023-12-02 18:31:35,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:31:35,226 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:35,227 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 18:31:35,227 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:35,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:35,228 INFO L85 PathProgramCache]: Analyzing trace with hash -457773465, now seen corresponding path program 1 times [2023-12-02 18:31:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:35,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471637813] [2023-12-02 18:31:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:35,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:35,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:35,351 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:35,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471637813] [2023-12-02 18:31:35,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471637813] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:35,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:35,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:31:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796363708] [2023-12-02 18:31:35,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:31:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:31:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:31:35,354 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:35,458 INFO L93 Difference]: Finished difference Result 101 states and 139 transitions. [2023-12-02 18:31:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:31:35,459 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), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-12-02 18:31:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:35,460 INFO L225 Difference]: With dead ends: 101 [2023-12-02 18:31:35,460 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 18:31:35,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:31:35,462 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 115 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:35,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 82 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:31:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 18:31:35,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 18:31:35,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.838235294117647) internal successors, (125), 91 states have internal predecessors, (125), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 139 transitions. [2023-12-02 18:31:35,470 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 139 transitions. Word has length 21 [2023-12-02 18:31:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:35,471 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 139 transitions. [2023-12-02 18:31:35,471 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), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 139 transitions. [2023-12-02 18:31:35,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:31:35,473 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:35,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:35,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 18:31:35,473 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:35,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash -457773464, now seen corresponding path program 1 times [2023-12-02 18:31:35,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:35,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138119858] [2023-12-02 18:31:35,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:35,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:31:35,631 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:35,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138119858] [2023-12-02 18:31:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138119858] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:31:35,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 18:31:35,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776582342] [2023-12-02 18:31:35,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:35,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:31:35,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:35,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:31:35,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:31:35,633 INFO L87 Difference]: Start difference. First operand 101 states and 139 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:35,806 INFO L93 Difference]: Finished difference Result 155 states and 197 transitions. [2023-12-02 18:31:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:31:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2023-12-02 18:31:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:35,809 INFO L225 Difference]: With dead ends: 155 [2023-12-02 18:31:35,809 INFO L226 Difference]: Without dead ends: 155 [2023-12-02 18:31:35,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:31:35,810 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 129 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:35,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 403 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:31:35,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-12-02 18:31:35,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 101. [2023-12-02 18:31:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 68 states have (on average 1.8235294117647058) internal successors, (124), 91 states have internal predecessors, (124), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:35,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 138 transitions. [2023-12-02 18:31:35,819 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 138 transitions. Word has length 21 [2023-12-02 18:31:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:35,819 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 138 transitions. [2023-12-02 18:31:35,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.0) internal successors, (12), 8 states have internal predecessors, (12), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:31:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 138 transitions. [2023-12-02 18:31:35,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:31:35,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:35,821 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:35,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 18:31:35,822 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:35,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash -209993497, now seen corresponding path program 1 times [2023-12-02 18:31:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:35,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197863538] [2023-12-02 18:31:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:36,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:31:36,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:36,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197863538] [2023-12-02 18:31:36,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197863538] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:31:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493435672] [2023-12-02 18:31:36,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:36,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:31:36,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:31:36,443 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:31:36,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 18:31:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:36,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:31:36,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:31:36,652 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 18:31:36,666 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 18:31:36,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:31:36,825 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 18 treesize of output 13 [2023-12-02 18:31:36,837 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:31:36,838 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 18:31:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:31:37,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:31:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493435672] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:31:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1024682673] [2023-12-02 18:31:37,405 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-12-02 18:31:37,406 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:31:37,411 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:31:37,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:31:37,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:31:38,133 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:31:38,159 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:31:38,199 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:31:39,941 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (let ((.cse1 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse3 (exists ((|v_#valid_63| (Array Int Int))) (let ((.cse10 (store |v_#valid_63| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= |c_#valid| (store .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (select |v_#valid_63| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0))))) (.cse4 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse5 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse6 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse7 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_19| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_19| 4294967296) 1))) (.cse0 ((as const (Array Int Int)) 0)) (.cse8 (exists ((|v_#length_53| (Array Int Int))) (= (let ((.cse9 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_53| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse9) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9)) |c_#length|)))) (or (and (exists ((|v_#memory_int_66| (Array Int (Array Int Int)))) (= (store |v_#memory_int_66| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse0) |c_#memory_int|)) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#memory_int_68| (Array Int (Array Int Int)))) (= (store |v_#memory_int_68| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse0) |c_#memory_int|)) .cse8))) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from true [2023-12-02 18:31:40,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1024682673] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:31:40,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:31:40,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [9, 9] total 32 [2023-12-02 18:31:40,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924675117] [2023-12-02 18:31:40,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:31:40,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:31:40,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:31:40,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:31:40,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=1056, Unknown=10, NotChecked=68, Total=1332 [2023-12-02 18:31:40,781 INFO L87 Difference]: Start difference. First operand 101 states and 138 transitions. Second operand has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:43,378 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 18:31:45,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:31:48,126 WARN L539 Checker$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 18:31:50,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:31:52,445 WARN L539 Checker$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 18:31:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:31:53,658 INFO L93 Difference]: Finished difference Result 114 states and 152 transitions. [2023-12-02 18:31:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 18:31:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-02 18:31:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:31:53,660 INFO L225 Difference]: With dead ends: 114 [2023-12-02 18:31:53,660 INFO L226 Difference]: Without dead ends: 114 [2023-12-02 18:31:53,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=230, Invalid=1246, Unknown=10, NotChecked=74, Total=1560 [2023-12-02 18:31:53,662 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 1 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:31:53,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 229 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 667 Invalid, 28 Unknown, 107 Unchecked, 12.6s Time] [2023-12-02 18:31:53,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-12-02 18:31:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2023-12-02 18:31:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.8208955223880596) internal successors, (122), 90 states have internal predecessors, (122), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:31:53,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2023-12-02 18:31:53,670 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 21 [2023-12-02 18:31:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:31:53,671 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2023-12-02 18:31:53,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:31:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2023-12-02 18:31:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-02 18:31:53,673 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:31:53,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:31:53,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 18:31:53,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:31:53,880 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:31:53,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:31:53,880 INFO L85 PathProgramCache]: Analyzing trace with hash 2080319915, now seen corresponding path program 1 times [2023-12-02 18:31:53,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:31:53,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130609567] [2023-12-02 18:31:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:53,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:31:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:31:54,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:31:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130609567] [2023-12-02 18:31:54,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130609567] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:31:54,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914393133] [2023-12-02 18:31:54,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:31:54,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:31:54,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:31:54,096 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:31:54,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 18:31:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:31:54,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:31:54,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:31:54,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:31:54,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:31:54,486 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:31:54,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914393133] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:31:54,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [675327632] [2023-12-02 18:31:54,489 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:31:54,489 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:31:54,490 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:31:54,490 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:31:54,490 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:31:54,984 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:31:55,002 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:31:55,033 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:03,081 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2051#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~n#1| 0) (= |ULTIMATE.start_downsweep_~n#1| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_main_#t~malloc16#1.base|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (or (and (<= (+ |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1)) (exists ((|v_#valid_67| (Array Int Int))) (and (= (select (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (store (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#valid|) (= (select |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base|) 0))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (exists ((|v_#memory_int_79| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_79| |ULTIMATE.start_main_#t~malloc16#1.base| ((as const (Array Int Int)) 0)))) (exists ((|v_#length_57| (Array Int Int))) (= |#length| (store (store |v_#length_57| |ULTIMATE.start_main_#t~malloc15#1.base| 0) |ULTIMATE.start_main_#t~malloc16#1.base| 0))) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (<= (+ |ULTIMATE.start_main_#t~malloc15#1.base| 1) |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0))) (and (<= (+ |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_is_pow2_~x#1_25| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_25| 4294967296) 1)) (exists ((|v_#valid_67| (Array Int Int))) (and (= (select (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (store (store |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base| 1) |ULTIMATE.start_main_#t~malloc16#1.base| 1) |#valid|) (= (select |v_#valid_67| |ULTIMATE.start_main_#t~malloc15#1.base|) 0))) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_main_#t~malloc15#1.base|) (exists ((|v_#length_57| (Array Int Int))) (= |#length| (store (store |v_#length_57| |ULTIMATE.start_main_#t~malloc15#1.base| 0) |ULTIMATE.start_main_#t~malloc16#1.base| 0))) (not (= |ULTIMATE.start_main_#t~malloc16#1.base| 0)) (<= (+ |ULTIMATE.start_main_#t~malloc15#1.base| 1) |#StackHeapBarrier|) (exists ((|v_#memory_int_80| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_80| |ULTIMATE.start_main_#t~malloc16#1.base| ((as const (Array Int Int)) 0)))) (not (= |ULTIMATE.start_main_#t~malloc15#1.base| 0)))) (= |ULTIMATE.start_main_~n~0#1| 0) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| 1) (= |ULTIMATE.start_downsweep_~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2023-12-02 18:32:03,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:32:03,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:32:03,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2023-12-02 18:32:03,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805223977] [2023-12-02 18:32:03,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:32:03,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:32:03,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:32:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=896, Unknown=10, NotChecked=0, Total=1056 [2023-12-02 18:32:03,084 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 18:32:03,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:03,425 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2023-12-02 18:32:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:32:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 22 [2023-12-02 18:32:03,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:03,426 INFO L225 Difference]: With dead ends: 134 [2023-12-02 18:32:03,426 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 18:32:03,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=187, Invalid=1062, Unknown=11, NotChecked=0, Total=1260 [2023-12-02 18:32:03,428 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 317 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:03,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 705 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:32:03,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 18:32:03,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2023-12-02 18:32:03,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:03,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-12-02 18:32:03,433 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 22 [2023-12-02 18:32:03,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:03,433 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-12-02 18:32:03,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 6 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-02 18:32:03,434 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-12-02 18:32:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 18:32:03,435 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:03,435 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] [2023-12-02 18:32:03,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 18:32:03,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:03,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:03,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2010062682, now seen corresponding path program 1 times [2023-12-02 18:32:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:03,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033814822] [2023-12-02 18:32:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:03,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:32:03,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:03,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033814822] [2023-12-02 18:32:03,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033814822] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658897766] [2023-12-02 18:32:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:03,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:03,767 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:03,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 18:32:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:03,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:32:03,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:32:03,996 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:32:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658897766] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:03,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:32:03,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 14 [2023-12-02 18:32:03,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433999400] [2023-12-02 18:32:03,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:03,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:32:03,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:03,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:32:03,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-02 18:32:03,998 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:32:04,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:04,140 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2023-12-02 18:32:04,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:32:04,141 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2023-12-02 18:32:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:04,142 INFO L225 Difference]: With dead ends: 130 [2023-12-02 18:32:04,142 INFO L226 Difference]: Without dead ends: 130 [2023-12-02 18:32:04,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:32:04,143 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 170 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:04,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 286 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:32:04,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-12-02 18:32:04,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 82. [2023-12-02 18:32:04,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2023-12-02 18:32:04,147 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 23 [2023-12-02 18:32:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:04,148 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2023-12-02 18:32:04,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.0) internal successors, (14), 9 states have internal predecessors, (14), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:32:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2023-12-02 18:32:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:32:04,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:04,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:04,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 18:32:04,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:04,350 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:04,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:04,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2112750028, now seen corresponding path program 1 times [2023-12-02 18:32:04,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:04,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593299611] [2023-12-02 18:32:04,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:04,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:04,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593299611] [2023-12-02 18:32:04,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593299611] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:04,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314177724] [2023-12-02 18:32:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:04,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:04,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:04,598 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:04,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 18:32:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:04,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:32:04,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:04,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:05,005 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 28 treesize of output 24 [2023-12-02 18:32:05,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:05,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314177724] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:32:05,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1055589062] [2023-12-02 18:32:05,104 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-12-02 18:32:05,104 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:32:05,104 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:32:05,104 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:32:05,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:32:05,510 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:32:05,525 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:32:05,572 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:09,446 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2745#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (or (< |ULTIMATE.start_downsweep_~n#1| 1) (< (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (* |ULTIMATE.start_downsweep_~n#1| 4))) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~a~0#1.base| |ULTIMATE.start_downsweep_#in~a#1.base|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_downsweep_~n#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.base| |ULTIMATE.start_downsweep_~a#1.base|) (= |ULTIMATE.start_downsweep_#in~space#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1) (<= 0 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_downsweep_~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_downsweep_#in~n#1| |ULTIMATE.start_main_~n~0#1|) (= 1 |ULTIMATE.start_downsweep_~space#1|))' at error location [2023-12-02 18:32:09,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:32:09,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:32:09,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2023-12-02 18:32:09,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277482301] [2023-12-02 18:32:09,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:32:09,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-02 18:32:09,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:09,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-02 18:32:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1665, Unknown=5, NotChecked=0, Total=1892 [2023-12-02 18:32:09,449 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:32:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:09,965 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2023-12-02 18:32:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:32:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 24 [2023-12-02 18:32:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:09,966 INFO L225 Difference]: With dead ends: 81 [2023-12-02 18:32:09,966 INFO L226 Difference]: Without dead ends: 81 [2023-12-02 18:32:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=371, Invalid=2378, Unknown=7, NotChecked=0, Total=2756 [2023-12-02 18:32:09,968 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 458 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:09,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 233 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:32:09,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-02 18:32:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-12-02 18:32:09,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:09,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2023-12-02 18:32:09,972 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 24 [2023-12-02 18:32:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:09,973 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2023-12-02 18:32:09,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:32:09,973 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2023-12-02 18:32:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:32:09,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:09,974 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 18:32:09,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 18:32:10,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:10,175 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:10,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1851217705, now seen corresponding path program 1 times [2023-12-02 18:32:10,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:10,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785994413] [2023-12-02 18:32:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:10,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:10,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:10,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785994413] [2023-12-02 18:32:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785994413] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904644632] [2023-12-02 18:32:10,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:10,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:10,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:10,516 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:10,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 18:32:10,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:10,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 18:32:10,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:10,625 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 18:32:10,633 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 18:32:10,729 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:32:10,730 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 18:32:10,735 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 18 treesize of output 13 [2023-12-02 18:32:10,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:32:10,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:11,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904644632] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784076836] [2023-12-02 18:32:11,185 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:32:11,185 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:32:11,186 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:32:11,186 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:32:11,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:32:11,665 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:32:11,697 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:32:11,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:13,339 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3069#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= (select |#length| |ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:32:13,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:32:13,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:32:13,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2023-12-02 18:32:13,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604596865] [2023-12-02 18:32:13,339 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:32:13,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:32:13,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:13,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:32:13,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1383, Unknown=6, NotChecked=0, Total=1560 [2023-12-02 18:32:13,341 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:32:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:14,457 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2023-12-02 18:32:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:32:14,458 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 24 [2023-12-02 18:32:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:14,459 INFO L225 Difference]: With dead ends: 127 [2023-12-02 18:32:14,459 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 18:32:14,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=373, Invalid=2481, Unknown=8, NotChecked=0, Total=2862 [2023-12-02 18:32:14,460 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 475 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:14,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 206 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:32:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 18:32:14,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 80. [2023-12-02 18:32:14,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.5918367346938775) internal successors, (78), 70 states have internal predecessors, (78), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:14,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2023-12-02 18:32:14,464 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 24 [2023-12-02 18:32:14,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:14,464 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2023-12-02 18:32:14,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.75) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:32:14,465 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2023-12-02 18:32:14,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:32:14,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:14,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:14,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 18:32:14,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:14,667 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:14,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:14,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1070576449, now seen corresponding path program 1 times [2023-12-02 18:32:14,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:14,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754057659] [2023-12-02 18:32:14,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:14,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:14,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:14,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754057659] [2023-12-02 18:32:14,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754057659] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:14,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:14,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:32:14,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979151678] [2023-12-02 18:32:14,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:14,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:32:14,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:32:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:32:14,718 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:14,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:14,782 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2023-12-02 18:32:14,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:32:14,783 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-12-02 18:32:14,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:14,784 INFO L225 Difference]: With dead ends: 77 [2023-12-02 18:32:14,784 INFO L226 Difference]: Without dead ends: 77 [2023-12-02 18:32:14,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:32:14,785 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 50 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:14,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 90 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:32:14,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-02 18:32:14,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-12-02 18:32:14,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.530612244897959) internal successors, (75), 67 states have internal predecessors, (75), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:14,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2023-12-02 18:32:14,789 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 25 [2023-12-02 18:32:14,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:14,789 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2023-12-02 18:32:14,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:14,789 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2023-12-02 18:32:14,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:32:14,790 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:14,790 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:14,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 18:32:14,791 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:14,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:14,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1070576450, now seen corresponding path program 1 times [2023-12-02 18:32:14,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:14,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949211681] [2023-12-02 18:32:14,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:14,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:14,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:14,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949211681] [2023-12-02 18:32:14,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949211681] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:14,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93996682] [2023-12-02 18:32:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:14,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:14,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:14,878 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:14,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 18:32:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:14,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:32:14,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:14,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:15,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93996682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:32:15,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54788616] [2023-12-02 18:32:15,021 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 18:32:15,021 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:32:15,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:32:15,021 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:32:15,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:32:15,392 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:32:15,405 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:32:15,433 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:17,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3635#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) 3) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_upsweep_~right~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:32:17,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:32:17,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:32:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2023-12-02 18:32:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317407895] [2023-12-02 18:32:17,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:32:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:32:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:32:17,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=722, Unknown=5, NotChecked=0, Total=812 [2023-12-02 18:32:17,113 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:17,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:17,204 INFO L93 Difference]: Finished difference Result 117 states and 131 transitions. [2023-12-02 18:32:17,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:32:17,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 25 [2023-12-02 18:32:17,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:17,206 INFO L225 Difference]: With dead ends: 117 [2023-12-02 18:32:17,206 INFO L226 Difference]: Without dead ends: 117 [2023-12-02 18:32:17,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=91, Invalid=773, Unknown=6, NotChecked=0, Total=870 [2023-12-02 18:32:17,207 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 43 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:17,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 244 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:32:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-02 18:32:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2023-12-02 18:32:17,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.52) internal successors, (76), 68 states have internal predecessors, (76), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:17,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2023-12-02 18:32:17,211 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 25 [2023-12-02 18:32:17,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:17,211 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2023-12-02 18:32:17,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:17,211 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2023-12-02 18:32:17,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:32:17,212 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:17,212 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] [2023-12-02 18:32:17,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 18:32:17,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:17,413 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:17,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:17,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1553173984, now seen corresponding path program 1 times [2023-12-02 18:32:17,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:17,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495346347] [2023-12-02 18:32:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:17,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:32:17,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495346347] [2023-12-02 18:32:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495346347] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946861773] [2023-12-02 18:32:17,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:17,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:17,710 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:17,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 18:32:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:17,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:32:17,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:17,815 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 10 treesize of output 9 [2023-12-02 18:32:17,946 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2023-12-02 18:32:17,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 [2023-12-02 18:32:18,348 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:32:18,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:18,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946861773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:18,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1871840604] [2023-12-02 18:32:18,627 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-12-02 18:32:18,627 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:32:18,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:32:18,628 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:32:18,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:32:19,006 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:32:19,018 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:32:19,036 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:20,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3979#(and (<= (select |#length| |ULTIMATE.start_main_~a0~0#1.base|) (+ (* |ULTIMATE.start_main_~i~1#1| 4) 3)) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= 1 |ULTIMATE.start_main_~n~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (* |ULTIMATE.start_main_~i~1#1| 4)) |ULTIMATE.start_main_#t~mem18#1|) (<= (+ (* |ULTIMATE.start_main_~i~1#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1))' at error location [2023-12-02 18:32:20,743 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:32:20,743 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:32:20,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-12-02 18:32:20,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099602319] [2023-12-02 18:32:20,744 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:32:20,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:32:20,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:20,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:32:20,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1115, Unknown=6, NotChecked=0, Total=1260 [2023-12-02 18:32:20,746 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:32:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:21,611 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2023-12-02 18:32:21,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:32:21,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 25 [2023-12-02 18:32:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:21,612 INFO L225 Difference]: With dead ends: 76 [2023-12-02 18:32:21,612 INFO L226 Difference]: Without dead ends: 76 [2023-12-02 18:32:21,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=213, Invalid=1421, Unknown=6, NotChecked=0, Total=1640 [2023-12-02 18:32:21,613 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 272 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:21,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 73 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:32:21,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-12-02 18:32:21,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-12-02 18:32:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.48) internal successors, (74), 66 states have internal predecessors, (74), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:21,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 88 transitions. [2023-12-02 18:32:21,617 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 88 transitions. Word has length 25 [2023-12-02 18:32:21,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:21,617 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 88 transitions. [2023-12-02 18:32:21,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:32:21,617 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 88 transitions. [2023-12-02 18:32:21,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:32:21,618 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:21,618 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:21,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 18:32:21,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 18:32:21,818 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:21,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:21,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1805688384, now seen corresponding path program 1 times [2023-12-02 18:32:21,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:21,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394315290] [2023-12-02 18:32:21,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:21,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:21,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:32:21,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394315290] [2023-12-02 18:32:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394315290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:21,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:32:21,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:32:21,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509767412] [2023-12-02 18:32:21,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:21,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:32:21,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:21,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:32:21,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:32:21,872 INFO L87 Difference]: Start difference. First operand 76 states and 88 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:21,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:21,954 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2023-12-02 18:32:21,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:32:21,954 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2023-12-02 18:32:21,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:21,955 INFO L225 Difference]: With dead ends: 75 [2023-12-02 18:32:21,955 INFO L226 Difference]: Without dead ends: 75 [2023-12-02 18:32:21,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:32:21,956 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 64 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:21,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 107 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:32:21,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-12-02 18:32:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2023-12-02 18:32:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 50 states have (on average 1.46) internal successors, (73), 65 states have internal predecessors, (73), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2023-12-02 18:32:21,961 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 27 [2023-12-02 18:32:21,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:21,961 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2023-12-02 18:32:21,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:32:21,961 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2023-12-02 18:32:21,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 18:32:21,962 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:21,962 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:21,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 18:32:21,963 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:21,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:21,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1805688383, now seen corresponding path program 1 times [2023-12-02 18:32:21,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:21,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013276099] [2023-12-02 18:32:21,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:21,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:22,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:22,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013276099] [2023-12-02 18:32:22,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013276099] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:22,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569438216] [2023-12-02 18:32:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:22,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:22,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:22,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:22,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 18:32:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:22,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:32:22,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:22,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:32:22,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 18:32:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:32:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569438216] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:32:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1501603699] [2023-12-02 18:32:22,455 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:32:22,455 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:32:22,456 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:32:22,456 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:32:22,456 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:32:22,893 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:32:22,905 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:32:22,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:32:26,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1501603699] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:32:26,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:32:26,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [10, 6, 6] total 36 [2023-12-02 18:32:26,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205331141] [2023-12-02 18:32:26,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:32:26,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 18:32:26,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:32:26,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 18:32:26,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1157, Unknown=4, NotChecked=0, Total=1332 [2023-12-02 18:32:26,824 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:32:30,136 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 18:32:32,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:32:32,289 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-12-02 18:32:32,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-02 18:32:32,290 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2023-12-02 18:32:32,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:32:32,291 INFO L225 Difference]: With dead ends: 111 [2023-12-02 18:32:32,291 INFO L226 Difference]: Without dead ends: 111 [2023-12-02 18:32:32,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=239, Invalid=1560, Unknown=7, NotChecked=0, Total=1806 [2023-12-02 18:32:32,292 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 47 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 4 mSolverCounterUnsat, 22 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 22 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:32:32,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 439 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1266 Invalid, 22 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 18:32:32,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-02 18:32:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2023-12-02 18:32:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 71 states have internal predecessors, (79), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:32:32,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2023-12-02 18:32:32,297 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 27 [2023-12-02 18:32:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:32:32,297 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2023-12-02 18:32:32,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:32:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2023-12-02 18:32:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:32:32,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:32:32,298 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:32:32,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 18:32:32,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 18:32:32,499 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:32:32,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:32:32,499 INFO L85 PathProgramCache]: Analyzing trace with hash -99681309, now seen corresponding path program 1 times [2023-12-02 18:32:32,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:32:32,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22131267] [2023-12-02 18:32:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:32,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:32:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 18:32:32,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:32:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22131267] [2023-12-02 18:32:32,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22131267] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:32:32,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76962960] [2023-12-02 18:32:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:32:32,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:32:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:32:32,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:32:32,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 18:32:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:32:32,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 18:32:32,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:32:32,943 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 18:32:32,962 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 7 treesize of output 6 [2023-12-02 18:32:33,001 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:32:33,002 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 18:32:33,012 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 15 treesize of output 10 [2023-12-02 18:32:33,028 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 15 treesize of output 10 [2023-12-02 18:32:33,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-12-02 18:32:33,102 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 33 [2023-12-02 18:32:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 18:32:33,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:01,201 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_downsweep_~n#1| Int) (|ULTIMATE.start_downsweep_~a#1.offset| Int) (|ULTIMATE.start_check_~a#1.offset| Int) (|ULTIMATE.start_check_~i~0#1| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| (- 4) (* |ULTIMATE.start_downsweep_~n#1| 4)) 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))) 0)) is different from false [2023-12-02 18:33:05,286 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_210 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2023-12-02 18:33:05,292 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_210 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_#t~malloc16#1.base| v_ArrVal_210) |c_ULTIMATE.start_main_~a~0#1.base|))) is different from false [2023-12-02 18:33:05,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76962960] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1740007448] [2023-12-02 18:33:05,307 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 18:33:05,307 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:05,307 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:05,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:05,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:05,799 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:33:05,819 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:33:05,858 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:08,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1740007448] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:08,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:33:08,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [12, 16] total 41 [2023-12-02 18:33:08,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023643344] [2023-12-02 18:33:08,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:08,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 18:33:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:08,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 18:33:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1630, Unknown=22, NotChecked=252, Total=2070 [2023-12-02 18:33:08,323 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:11,457 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 18:33:16,602 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 18:33:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:17,166 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2023-12-02 18:33:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:33:17,166 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 29 [2023-12-02 18:33:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:17,167 INFO L225 Difference]: With dead ends: 109 [2023-12-02 18:33:17,167 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 18:33:17,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=208, Invalid=2131, Unknown=25, NotChecked=288, Total=2652 [2023-12-02 18:33:17,168 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 63 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 1 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:17,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 383 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1247 Invalid, 19 Unknown, 0 Unchecked, 6.1s Time] [2023-12-02 18:33:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 18:33:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2023-12-02 18:33:17,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.4035087719298245) internal successors, (80), 72 states have internal predecessors, (80), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:17,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-12-02 18:33:17,172 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 29 [2023-12-02 18:33:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:17,173 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-12-02 18:33:17,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 16 states have internal predecessors, (19), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-12-02 18:33:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:33:17,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:17,173 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:17,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 18:33:17,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 18:33:17,374 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:17,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:17,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1278961661, now seen corresponding path program 1 times [2023-12-02 18:33:17,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:17,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045940073] [2023-12-02 18:33:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:17,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:17,552 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045940073] [2023-12-02 18:33:17,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045940073] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:17,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511092302] [2023-12-02 18:33:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:17,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:17,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:17,553 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:17,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:33:17,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:17,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:33:17,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:17,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:17,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 18:33:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:17,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511092302] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:17,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1288497133] [2023-12-02 18:33:17,839 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 18:33:17,839 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:17,839 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:17,839 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:17,839 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:18,315 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:33:18,327 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:33:18,348 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:18,929 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (let ((.cse0 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse1 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse2 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse3 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse4 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_43| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_43| 4294967296) 1))) (.cse5 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and .cse0 .cse1 (exists ((|v_#length_83| (Array Int Int))) (= (store |v_#length_83| |c_#Ultimate.meminit_#ptr.base| .cse2) |c_#length|)) .cse3 (exists ((|v_#valid_92| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_92| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_92| |c_#Ultimate.meminit_#ptr.base|) 0))) .cse4 .cse5) (and .cse0 .cse1 (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| Int) (|v_#memory_int_193| (Array Int (Array Int Int))) (|v_#valid_92| (Array Int Int)) (|v_#length_83| (Array Int Int))) (let ((.cse6 (store |v_#valid_92| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| 1))) (and (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| 1) |c_#StackHeapBarrier|) (= (store (store |v_#length_83| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| .cse2) |c_#Ultimate.meminit_#ptr.base| .cse2) |c_#length|) (= |c_old(#memory_int)| (store |v_#memory_int_193| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| ((as const (Array Int Int)) 0))) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34| 0)) (= |c_#valid| (store .cse6 |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_92| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_34|) 0) (= (select .cse6 |c_#Ultimate.meminit_#ptr.base|) 0)))) .cse3 .cse4 .cse5))) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-12-02 18:33:20,130 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5279#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) 3) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= |ULTIMATE.start_upsweep_~right~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:33:20,130 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:20,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:20,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-12-02 18:33:20,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441066369] [2023-12-02 18:33:20,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:20,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 18:33:20,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:20,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 18:33:20,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1365, Unknown=5, NotChecked=76, Total=1640 [2023-12-02 18:33:20,132 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:33:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:20,698 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2023-12-02 18:33:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:33:20,699 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 29 [2023-12-02 18:33:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:20,700 INFO L225 Difference]: With dead ends: 132 [2023-12-02 18:33:20,700 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 18:33:20,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=428, Invalid=2327, Unknown=5, NotChecked=102, Total=2862 [2023-12-02 18:33:20,702 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 743 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:20,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [743 Valid, 193 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:33:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 18:33:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 94. [2023-12-02 18:33:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 67 states have (on average 1.462686567164179) internal successors, (98), 82 states have internal predecessors, (98), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:20,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2023-12-02 18:33:20,707 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 29 [2023-12-02 18:33:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:20,707 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2023-12-02 18:33:20,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 21 states have internal predecessors, (42), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:33:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2023-12-02 18:33:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:33:20,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:20,708 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:20,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 18:33:20,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 18:33:20,908 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:20,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:20,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1204852857, now seen corresponding path program 1 times [2023-12-02 18:33:20,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:20,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274291632] [2023-12-02 18:33:20,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:20,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:20,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:20,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274291632] [2023-12-02 18:33:20,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274291632] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:20,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:33:20,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:33:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831443793] [2023-12-02 18:33:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:20,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:33:20,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:33:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:33:20,990 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:21,089 INFO L93 Difference]: Finished difference Result 93 states and 111 transitions. [2023-12-02 18:33:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:33:21,089 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2023-12-02 18:33:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:21,090 INFO L225 Difference]: With dead ends: 93 [2023-12-02 18:33:21,091 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 18:33:21,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:33:21,092 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 84 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:21,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 87 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 18:33:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-02 18:33:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 67 states have (on average 1.4477611940298507) internal successors, (97), 81 states have internal predecessors, (97), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:21,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2023-12-02 18:33:21,098 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 30 [2023-12-02 18:33:21,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:21,098 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2023-12-02 18:33:21,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:33:21,098 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2023-12-02 18:33:21,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:33:21,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:21,099 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:21,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-02 18:33:21,100 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:21,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:21,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1204852858, now seen corresponding path program 1 times [2023-12-02 18:33:21,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:21,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899323950] [2023-12-02 18:33:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:21,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:21,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899323950] [2023-12-02 18:33:21,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899323950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:21,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302977896] [2023-12-02 18:33:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:21,309 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:21,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 18:33:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:21,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 18:33:21,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:21,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:21,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 18:33:21,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:21,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302977896] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [721153549] [2023-12-02 18:33:21,607 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 18:33:21,607 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:21,607 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:21,607 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:21,607 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:22,014 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:33:22,027 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:33:22,053 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:26,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5931#(and (= |ULTIMATE.start_check_~n#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_check_#in~a#1.offset| 0) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| 0) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_#in~n#1| 1) (= |ULTIMATE.start_check_~a#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (exists ((|v_#memory_int_217| (Array Int (Array Int Int)))) (= |#memory_int| (store |v_#memory_int_217| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_217| |ULTIMATE.start_main_~a~0#1.base|) 0 0)))) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= (select |#length| |ULTIMATE.start_check_~a0#1.base|) 3) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~n~0#1| 1) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (= 0 |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:33:26,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:26,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:26,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-12-02 18:33:26,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566245418] [2023-12-02 18:33:26,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:26,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:33:26,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:26,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:33:26,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=927, Unknown=7, NotChecked=0, Total=1056 [2023-12-02 18:33:26,392 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:33:26,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:26,572 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2023-12-02 18:33:26,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:33:26,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 30 [2023-12-02 18:33:26,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:26,573 INFO L225 Difference]: With dead ends: 101 [2023-12-02 18:33:26,573 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 18:33:26,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=146, Invalid=1106, Unknown=8, NotChecked=0, Total=1260 [2023-12-02 18:33:26,574 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 294 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:26,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 128 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:33:26,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 18:33:26,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2023-12-02 18:33:26,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.4583333333333333) internal successors, (105), 86 states have internal predecessors, (105), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:26,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2023-12-02 18:33:26,577 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 30 [2023-12-02 18:33:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:26,577 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2023-12-02 18:33:26,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.0) internal successors, (40), 11 states have internal predecessors, (40), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:33:26,578 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2023-12-02 18:33:26,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 18:33:26,578 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:26,578 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:26,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 18:33:26,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:26,779 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:26,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash -993105820, now seen corresponding path program 1 times [2023-12-02 18:33:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:26,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272575715] [2023-12-02 18:33:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:26,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272575715] [2023-12-02 18:33:26,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272575715] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:26,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565689291] [2023-12-02 18:33:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:26,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:26,973 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:26,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 18:33:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:27,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:33:27,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:27,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:27,249 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 24 treesize of output 20 [2023-12-02 18:33:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:27,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565689291] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:27,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [686765360] [2023-12-02 18:33:27,329 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 18:33:27,329 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:27,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:27,330 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:27,330 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:27,775 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:33:27,787 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:33:27,805 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:32,030 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6358#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) 7) (= |ULTIMATE.start_upsweep_~right~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) 0)))' at error location [2023-12-02 18:33:32,030 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:33:32,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:32,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-12-02 18:33:32,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97162311] [2023-12-02 18:33:32,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:33:32,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 18:33:32,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:32,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 18:33:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1895, Unknown=6, NotChecked=0, Total=2162 [2023-12-02 18:33:32,033 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:33:32,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:32,620 INFO L93 Difference]: Finished difference Result 124 states and 142 transitions. [2023-12-02 18:33:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:33:32,620 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 30 [2023-12-02 18:33:32,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:32,621 INFO L225 Difference]: With dead ends: 124 [2023-12-02 18:33:32,621 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 18:33:32,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=452, Invalid=2622, Unknown=6, NotChecked=0, Total=3080 [2023-12-02 18:33:32,623 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 448 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:32,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 279 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:33:32,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 18:33:32,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2023-12-02 18:33:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.4246575342465753) internal successors, (104), 86 states have internal predecessors, (104), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 118 transitions. [2023-12-02 18:33:32,626 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 118 transitions. Word has length 30 [2023-12-02 18:33:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 118 transitions. [2023-12-02 18:33:32,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 26 states have internal predecessors, (48), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:33:32,627 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 118 transitions. [2023-12-02 18:33:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 18:33:32,628 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:32,628 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:32,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 18:33:32,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:32,828 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:32,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash -559015358, now seen corresponding path program 1 times [2023-12-02 18:33:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676357461] [2023-12-02 18:33:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:32,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:32,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676357461] [2023-12-02 18:33:32,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676357461] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:32,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575428720] [2023-12-02 18:33:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:32,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:32,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:32,930 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:32,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 18:33:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:33,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:33:33,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:33,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:33:33,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575428720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:33,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1297137280] [2023-12-02 18:33:33,096 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:33:33,096 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:33,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:33,097 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:33,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:33,595 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:33:33,607 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:33:33,624 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:35,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1297137280] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:35,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:35,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [7, 6, 6] total 30 [2023-12-02 18:33:35,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540234101] [2023-12-02 18:33:35,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:35,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 18:33:35,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 18:33:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=777, Unknown=9, NotChecked=0, Total=870 [2023-12-02 18:33:35,796 INFO L87 Difference]: Start difference. First operand 98 states and 118 transitions. Second operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:38,865 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 18:33:43,824 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 18:33:44,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:44,906 INFO L93 Difference]: Finished difference Result 109 states and 127 transitions. [2023-12-02 18:33:44,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 18:33:44,907 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 31 [2023-12-02 18:33:44,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:44,908 INFO L225 Difference]: With dead ends: 109 [2023-12-02 18:33:44,908 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 18:33:44,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=136, Invalid=1256, Unknown=14, NotChecked=0, Total=1406 [2023-12-02 18:33:44,909 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 6 mSolverCounterUnsat, 20 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 20 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:44,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 194 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 935 Invalid, 20 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 18:33:44,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 18:33:44,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2023-12-02 18:33:44,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 90 states have internal predecessors, (108), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 122 transitions. [2023-12-02 18:33:44,915 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 122 transitions. Word has length 31 [2023-12-02 18:33:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:44,915 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 122 transitions. [2023-12-02 18:33:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 122 transitions. [2023-12-02 18:33:44,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:33:44,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:44,916 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:44,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 18:33:45,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:45,116 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:33:45,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:33:45,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1777517005, now seen corresponding path program 1 times [2023-12-02 18:33:45,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:33:45,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304148626] [2023-12-02 18:33:45,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:45,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:33:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:45,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:45,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:33:45,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304148626] [2023-12-02 18:33:45,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304148626] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:33:45,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408294412] [2023-12-02 18:33:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:33:45,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:33:45,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:33:45,218 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:33:45,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:33:45,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:33:45,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:33:45,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:33:45,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:45,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:33:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:33:45,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408294412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:33:45,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [489194063] [2023-12-02 18:33:45,394 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 18:33:45,394 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:33:45,394 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:33:45,395 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:33:45,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:33:46,052 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:33:46,065 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:33:46,097 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:33:50,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [489194063] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:33:50,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:33:50,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [8, 7, 7] total 34 [2023-12-02 18:33:50,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913036807] [2023-12-02 18:33:50,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:33:50,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 18:33:50,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:33:50,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 18:33:50,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1006, Unknown=4, NotChecked=0, Total=1122 [2023-12-02 18:33:50,965 INFO L87 Difference]: Start difference. First operand 102 states and 122 transitions. Second operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:54,123 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 18:33:56,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:33:59,328 WARN L539 Checker$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 18:33:59,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:33:59,842 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2023-12-02 18:33:59,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 18:33:59,842 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 32 [2023-12-02 18:33:59,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:33:59,843 INFO L225 Difference]: With dead ends: 121 [2023-12-02 18:33:59,843 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 18:33:59,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=148, Invalid=1405, Unknown=7, NotChecked=0, Total=1560 [2023-12-02 18:33:59,844 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 22 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 3 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:33:59,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 351 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1108 Invalid, 21 Unknown, 0 Unchecked, 8.0s Time] [2023-12-02 18:33:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 18:33:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 109. [2023-12-02 18:33:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 97 states have internal predecessors, (117), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:33:59,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 131 transitions. [2023-12-02 18:33:59,848 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 131 transitions. Word has length 32 [2023-12-02 18:33:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:33:59,849 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 131 transitions. [2023-12-02 18:33:59,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:33:59,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 131 transitions. [2023-12-02 18:33:59,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:33:59,849 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:33:59,850 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:33:59,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:34:00,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 18:34:00,050 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:00,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:00,051 INFO L85 PathProgramCache]: Analyzing trace with hash -744491571, now seen corresponding path program 1 times [2023-12-02 18:34:00,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:00,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694842990] [2023-12-02 18:34:00,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:00,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:00,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694842990] [2023-12-02 18:34:00,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694842990] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:00,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258791316] [2023-12-02 18:34:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:00,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:00,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:00,178 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:00,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 18:34:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:00,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:34:00,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:00,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:00,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258791316] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:00,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552803491] [2023-12-02 18:34:00,389 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2023-12-02 18:34:00,389 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:00,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:00,389 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:00,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:00,793 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:00,806 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:00,823 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:02,915 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7719#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_upsweep_~a#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~n#1| |ULTIMATE.start_upsweep_#in~n#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) 7) (= |ULTIMATE.start_upsweep_~right~0#1| 1) (= |ULTIMATE.start_upsweep_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) 0)))' at error location [2023-12-02 18:34:02,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:02,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:02,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2023-12-02 18:34:02,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787682448] [2023-12-02 18:34:02,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:02,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:34:02,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:34:02,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1095, Unknown=5, NotChecked=0, Total=1260 [2023-12-02 18:34:02,917 INFO L87 Difference]: Start difference. First operand 109 states and 131 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:03,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:03,272 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2023-12-02 18:34:03,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:34:03,272 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-12-02 18:34:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:03,273 INFO L225 Difference]: With dead ends: 121 [2023-12-02 18:34:03,273 INFO L226 Difference]: Without dead ends: 121 [2023-12-02 18:34:03,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=295, Invalid=1679, Unknown=6, NotChecked=0, Total=1980 [2023-12-02 18:34:03,275 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 201 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:03,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 330 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-12-02 18:34:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2023-12-02 18:34:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 81 states have (on average 1.3703703703703705) internal successors, (111), 94 states have internal predecessors, (111), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2023-12-02 18:34:03,278 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 32 [2023-12-02 18:34:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:03,278 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2023-12-02 18:34:03,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:03,279 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2023-12-02 18:34:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:34:03,279 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:03,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:03,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 18:34:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 18:34:03,480 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:03,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:03,480 INFO L85 PathProgramCache]: Analyzing trace with hash 731637978, now seen corresponding path program 1 times [2023-12-02 18:34:03,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:03,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829047315] [2023-12-02 18:34:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:03,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:03,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:03,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829047315] [2023-12-02 18:34:03,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829047315] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:03,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:03,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:34:03,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804094601] [2023-12-02 18:34:03,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:03,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:34:03,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:03,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:34:03,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:34:03,534 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:03,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:03,587 INFO L93 Difference]: Finished difference Result 105 states and 124 transitions. [2023-12-02 18:34:03,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:34:03,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2023-12-02 18:34:03,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:03,589 INFO L225 Difference]: With dead ends: 105 [2023-12-02 18:34:03,589 INFO L226 Difference]: Without dead ends: 105 [2023-12-02 18:34:03,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:34:03,590 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:03,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 52 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:34:03,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-12-02 18:34:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-12-02 18:34:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.3580246913580247) internal successors, (110), 93 states have internal predecessors, (110), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2023-12-02 18:34:03,595 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 33 [2023-12-02 18:34:03,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:03,595 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2023-12-02 18:34:03,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:03,596 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2023-12-02 18:34:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:34:03,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:03,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:03,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 18:34:03,597 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:03,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:03,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1880605486, now seen corresponding path program 1 times [2023-12-02 18:34:03,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:03,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283635122] [2023-12-02 18:34:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:03,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:03,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283635122] [2023-12-02 18:34:03,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283635122] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:03,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968133421] [2023-12-02 18:34:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:03,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:03,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:03,767 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:03,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 18:34:03,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:03,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:34:03,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:03,961 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:03,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:04,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968133421] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:04,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316233915] [2023-12-02 18:34:04,058 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:04,058 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:04,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:04,058 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:04,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:04,765 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:04,777 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:04,799 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:07,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8409#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:07,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:07,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:07,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2023-12-02 18:34:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307797622] [2023-12-02 18:34:07,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:07,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:34:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:34:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1282, Unknown=8, NotChecked=0, Total=1406 [2023-12-02 18:34:07,126 INFO L87 Difference]: Start difference. First operand 105 states and 124 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:07,380 INFO L93 Difference]: Finished difference Result 175 states and 200 transitions. [2023-12-02 18:34:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:34:07,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2023-12-02 18:34:07,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:07,382 INFO L225 Difference]: With dead ends: 175 [2023-12-02 18:34:07,382 INFO L226 Difference]: Without dead ends: 175 [2023-12-02 18:34:07,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=164, Invalid=1633, Unknown=9, NotChecked=0, Total=1806 [2023-12-02 18:34:07,383 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 85 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:07,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 409 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-12-02 18:34:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 123. [2023-12-02 18:34:07,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 111 states have internal predecessors, (133), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:07,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2023-12-02 18:34:07,388 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 33 [2023-12-02 18:34:07,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:07,389 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2023-12-02 18:34:07,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2023-12-02 18:34:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:34:07,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:07,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:07,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 18:34:07,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-02 18:34:07,590 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:07,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:07,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1355215160, now seen corresponding path program 1 times [2023-12-02 18:34:07,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:07,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805051369] [2023-12-02 18:34:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:07,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:07,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:07,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805051369] [2023-12-02 18:34:07,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805051369] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:07,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603644536] [2023-12-02 18:34:07,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:07,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:07,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:07,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:07,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:34:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:07,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:34:07,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:07,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:34:07,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603644536] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:07,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [931722942] [2023-12-02 18:34:07,902 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2023-12-02 18:34:07,902 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:07,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:07,903 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:07,903 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:08,602 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 68 for LOIs [2023-12-02 18:34:08,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 75 for LOIs [2023-12-02 18:34:08,651 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:11,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8955#(and (= |ULTIMATE.start_check_~n#1| 1) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (= |ULTIMATE.start_main_~space~1#1| 1) (= |ULTIMATE.start_check_#in~a#1.offset| 0) (= |ULTIMATE.start_upsweep_#res#1| 1) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| 0) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_check_#in~n#1| 1) (= |ULTIMATE.start_check_~a#1.offset| 0) (<= 4 (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (= |ULTIMATE.start_is_pow2_#res#1| 1) (exists ((|v_#memory_int_321| (Array Int (Array Int Int)))) (= (store |v_#memory_int_321| |ULTIMATE.start_main_~a~0#1.base| (store (select |v_#memory_int_321| |ULTIMATE.start_main_~a~0#1.base|) 0 0)) |#memory_int|)) (<= (select |#length| |ULTIMATE.start_check_~a0#1.base|) 3) (<= 1 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_main_~n~0#1| 1) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (= 0 |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:34:11,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:11,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:11,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-12-02 18:34:11,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074584572] [2023-12-02 18:34:11,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:11,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:34:11,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:34:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1063, Unknown=5, NotChecked=0, Total=1190 [2023-12-02 18:34:11,801 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:11,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:11,988 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2023-12-02 18:34:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:34:11,988 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2023-12-02 18:34:11,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:11,990 INFO L225 Difference]: With dead ends: 129 [2023-12-02 18:34:11,990 INFO L226 Difference]: Without dead ends: 129 [2023-12-02 18:34:11,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=143, Invalid=1257, Unknown=6, NotChecked=0, Total=1406 [2023-12-02 18:34:11,991 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 37 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:11,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 458 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-12-02 18:34:11,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 119. [2023-12-02 18:34:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 107 states have internal predecessors, (127), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:11,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2023-12-02 18:34:11,994 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 35 [2023-12-02 18:34:11,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:11,994 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2023-12-02 18:34:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:11,995 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2023-12-02 18:34:11,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 18:34:11,995 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:11,995 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:12,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:12,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 18:34:12,196 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:12,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash -731824943, now seen corresponding path program 1 times [2023-12-02 18:34:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:12,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652738026] [2023-12-02 18:34:12,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:12,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:12,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:12,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652738026] [2023-12-02 18:34:12,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652738026] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:12,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:12,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:34:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161704057] [2023-12-02 18:34:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:12,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:34:12,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:12,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:34:12,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:34:12,232 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:34:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:12,271 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2023-12-02 18:34:12,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:34:12,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2023-12-02 18:34:12,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:12,272 INFO L225 Difference]: With dead ends: 118 [2023-12-02 18:34:12,272 INFO L226 Difference]: Without dead ends: 118 [2023-12-02 18:34:12,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:34:12,273 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:12,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 56 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 18:34:12,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-12-02 18:34:12,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-12-02 18:34:12,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.3263157894736841) internal successors, (126), 106 states have internal predecessors, (126), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 140 transitions. [2023-12-02 18:34:12,276 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 140 transitions. Word has length 36 [2023-12-02 18:34:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:12,277 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 140 transitions. [2023-12-02 18:34:12,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:34:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2023-12-02 18:34:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 18:34:12,277 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:12,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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 18:34:12,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-12-02 18:34:12,278 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:12,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:12,278 INFO L85 PathProgramCache]: Analyzing trace with hash -572882924, now seen corresponding path program 2 times [2023-12-02 18:34:12,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:12,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424349549] [2023-12-02 18:34:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:12,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:12,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424349549] [2023-12-02 18:34:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424349549] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401295211] [2023-12-02 18:34:12,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:34:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:12,482 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:12,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 18:34:12,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:34:12,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:34:12,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:34:12,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:12,741 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:34:12,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:34:13,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401295211] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:13,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1266431407] [2023-12-02 18:34:13,061 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:13,062 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:13,062 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:13,062 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:13,062 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:13,671 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:13,683 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:13,700 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:14,396 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (let ((.cse3 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse0 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse1 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_66| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_66| 4294967296) 1))) (.cse2 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse4 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse5 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#length_102| (Array Int Int))) (= (store |v_#length_102| |c_#Ultimate.meminit_#ptr.base| .cse3) |c_#length|)) .cse4 .cse5 (exists ((|v_#valid_111| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_111| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_111| |c_#Ultimate.meminit_#ptr.base|) 0)))) (and (exists ((|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| Int) (|v_#valid_111| (Array Int Int)) (|v_#memory_int_331| (Array Int (Array Int Int))) (|v_#length_102| (Array Int Int))) (let ((.cse6 (store |v_#valid_111| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| 1))) (and (= |c_#valid| (store .cse6 |c_#Ultimate.meminit_#ptr.base| 1)) (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| 1) |c_#StackHeapBarrier|) (= |c_#length| (store (store |v_#length_102| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| .cse3) |c_#Ultimate.meminit_#ptr.base| .cse3)) (= (select .cse6 |c_#Ultimate.meminit_#ptr.base|) 0) (= (select |v_#valid_111| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58|) 0) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| 0)) (= |c_old(#memory_int)| (store |v_#memory_int_331| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_58| ((as const (Array Int Int)) 0)))))) .cse0 .cse1 .cse2 .cse4 .cse5))) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-12-02 18:34:15,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9710#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:15,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:15,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:15,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2023-12-02 18:34:15,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483300104] [2023-12-02 18:34:15,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:15,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 18:34:15,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:15,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 18:34:15,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1963, Unknown=6, NotChecked=90, Total=2256 [2023-12-02 18:34:15,972 INFO L87 Difference]: Start difference. First operand 118 states and 140 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:34:17,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:17,733 INFO L93 Difference]: Finished difference Result 180 states and 204 transitions. [2023-12-02 18:34:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 18:34:17,733 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-12-02 18:34:17,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:17,735 INFO L225 Difference]: With dead ends: 180 [2023-12-02 18:34:17,735 INFO L226 Difference]: Without dead ends: 180 [2023-12-02 18:34:17,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1235 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=766, Invalid=4633, Unknown=7, NotChecked=144, Total=5550 [2023-12-02 18:34:17,737 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 432 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:17,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 454 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:34:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-12-02 18:34:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 118. [2023-12-02 18:34:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 106 states have internal predecessors, (125), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions. [2023-12-02 18:34:17,741 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 36 [2023-12-02 18:34:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:17,741 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 139 transitions. [2023-12-02 18:34:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 26 states have internal predecessors, (52), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:34:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions. [2023-12-02 18:34:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 18:34:17,742 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:17,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:17,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 18:34:17,943 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:17,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1417155938, now seen corresponding path program 1 times [2023-12-02 18:34:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666461720] [2023-12-02 18:34:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:18,062 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:18,062 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666461720] [2023-12-02 18:34:18,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666461720] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576600606] [2023-12-02 18:34:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:18,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:18,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:18,063 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:18,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 18:34:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:18,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:34:18,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:18,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576600606] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1371927532] [2023-12-02 18:34:18,230 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:18,230 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:18,231 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:18,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:18,231 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:18,868 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:18,885 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:18,903 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:22,637 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10309#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:22,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:22,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:22,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-12-02 18:34:22,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74324152] [2023-12-02 18:34:22,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:22,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:34:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:34:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1013, Unknown=5, NotChecked=0, Total=1122 [2023-12-02 18:34:22,639 INFO L87 Difference]: Start difference. First operand 118 states and 139 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:22,821 INFO L93 Difference]: Finished difference Result 157 states and 178 transitions. [2023-12-02 18:34:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:34:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 36 [2023-12-02 18:34:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:22,822 INFO L225 Difference]: With dead ends: 157 [2023-12-02 18:34:22,822 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 18:34:22,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=126, Invalid=1201, Unknown=5, NotChecked=0, Total=1332 [2023-12-02 18:34:22,823 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 61 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:22,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 405 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:22,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 18:34:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2023-12-02 18:34:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 98 states have internal predecessors, (113), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 127 transitions. [2023-12-02 18:34:22,827 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 127 transitions. Word has length 36 [2023-12-02 18:34:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:22,827 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 127 transitions. [2023-12-02 18:34:22,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:22,827 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 127 transitions. [2023-12-02 18:34:22,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:22,827 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:22,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:22,832 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 18:34:23,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:23,028 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:23,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1211736546, now seen corresponding path program 1 times [2023-12-02 18:34:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:23,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027502210] [2023-12-02 18:34:23,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:23,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:23,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:23,128 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:23,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027502210] [2023-12-02 18:34:23,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027502210] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:23,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:23,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:34:23,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453592161] [2023-12-02 18:34:23,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:23,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:34:23,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:23,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:34:23,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:34:23,129 INFO L87 Difference]: Start difference. First operand 110 states and 127 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:23,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:23,221 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2023-12-02 18:34:23,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:34:23,222 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-12-02 18:34:23,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:23,223 INFO L225 Difference]: With dead ends: 109 [2023-12-02 18:34:23,223 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 18:34:23,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 18:34:23,223 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 146 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:23,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 69 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:23,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 18:34:23,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-12-02 18:34:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 97 states have internal predecessors, (112), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:23,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2023-12-02 18:34:23,226 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 37 [2023-12-02 18:34:23,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:23,226 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2023-12-02 18:34:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:23,227 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2023-12-02 18:34:23,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:23,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:23,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:23,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-12-02 18:34:23,228 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:23,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:23,228 INFO L85 PathProgramCache]: Analyzing trace with hash -579501453, now seen corresponding path program 1 times [2023-12-02 18:34:23,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:23,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238783703] [2023-12-02 18:34:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:23,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:23,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238783703] [2023-12-02 18:34:23,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238783703] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:23,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885143447] [2023-12-02 18:34:23,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:23,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:23,360 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:23,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:34:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:23,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:34:23,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:23,582 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:23,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:23,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885143447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:23,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1517582421] [2023-12-02 18:34:23,649 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:23,649 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:23,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:23,649 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:23,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:24,455 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:24,467 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:24,484 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:26,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11072#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:26,988 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:26,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:26,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-02 18:34:26,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692552421] [2023-12-02 18:34:26,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:26,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-02 18:34:26,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:26,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-02 18:34:26,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1334, Unknown=6, NotChecked=0, Total=1482 [2023-12-02 18:34:26,990 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:34:27,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:27,425 INFO L93 Difference]: Finished difference Result 167 states and 190 transitions. [2023-12-02 18:34:27,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:34:27,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 37 [2023-12-02 18:34:27,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:27,427 INFO L225 Difference]: With dead ends: 167 [2023-12-02 18:34:27,427 INFO L226 Difference]: Without dead ends: 167 [2023-12-02 18:34:27,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=260, Invalid=2183, Unknown=7, NotChecked=0, Total=2450 [2023-12-02 18:34:27,428 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 545 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:27,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 262 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:34:27,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-12-02 18:34:27,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2023-12-02 18:34:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 102 states have (on average 1.2647058823529411) internal successors, (129), 112 states have internal predecessors, (129), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:27,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 143 transitions. [2023-12-02 18:34:27,432 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 143 transitions. Word has length 37 [2023-12-02 18:34:27,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:27,432 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 143 transitions. [2023-12-02 18:34:27,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:34:27,432 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 143 transitions. [2023-12-02 18:34:27,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:27,433 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:27,433 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:27,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 18:34:27,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-12-02 18:34:27,634 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:27,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash -819667128, now seen corresponding path program 1 times [2023-12-02 18:34:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:27,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562440235] [2023-12-02 18:34:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:27,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:27,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562440235] [2023-12-02 18:34:27,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562440235] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:27,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942972965] [2023-12-02 18:34:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:27,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:27,803 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:27,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 18:34:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:27,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:34:27,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:27,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:34:27,967 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:34:27,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942972965] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:27,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:34:27,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2023-12-02 18:34:27,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652697895] [2023-12-02 18:34:27,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:27,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:34:27,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:27,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:34:27,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:34:27,969 INFO L87 Difference]: Start difference. First operand 124 states and 143 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:28,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:28,034 INFO L93 Difference]: Finished difference Result 126 states and 144 transitions. [2023-12-02 18:34:28,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:34:28,034 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2023-12-02 18:34:28,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:28,035 INFO L225 Difference]: With dead ends: 126 [2023-12-02 18:34:28,035 INFO L226 Difference]: Without dead ends: 126 [2023-12-02 18:34:28,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:34:28,036 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 21 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:28,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 125 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-12-02 18:34:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2023-12-02 18:34:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 103 states have (on average 1.2621359223300972) internal successors, (130), 113 states have internal predecessors, (130), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:28,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 144 transitions. [2023-12-02 18:34:28,041 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 144 transitions. Word has length 37 [2023-12-02 18:34:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:28,041 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 144 transitions. [2023-12-02 18:34:28,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:28,042 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 144 transitions. [2023-12-02 18:34:28,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:34:28,042 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:28,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:28,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:28,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:28,243 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:28,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:28,244 INFO L85 PathProgramCache]: Analyzing trace with hash -819798976, now seen corresponding path program 1 times [2023-12-02 18:34:28,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:28,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726091479] [2023-12-02 18:34:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:28,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:28,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:28,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:34:28,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:28,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726091479] [2023-12-02 18:34:28,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726091479] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:28,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:28,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:34:28,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775906694] [2023-12-02 18:34:28,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:28,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:34:28,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:28,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:34:28,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:34:28,380 INFO L87 Difference]: Start difference. First operand 125 states and 144 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:28,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:28,478 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2023-12-02 18:34:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:34:28,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-12-02 18:34:28,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:28,479 INFO L225 Difference]: With dead ends: 134 [2023-12-02 18:34:28,479 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 18:34:28,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:34:28,480 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:28,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 84 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 18:34:28,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 130. [2023-12-02 18:34:28,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 108 states have (on average 1.2685185185185186) internal successors, (137), 118 states have internal predecessors, (137), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:34:28,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 151 transitions. [2023-12-02 18:34:28,484 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 151 transitions. Word has length 37 [2023-12-02 18:34:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:28,484 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 151 transitions. [2023-12-02 18:34:28,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:28,484 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 151 transitions. [2023-12-02 18:34:28,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:34:28,485 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:28,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:28,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-12-02 18:34:28,485 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:28,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:28,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1090872948, now seen corresponding path program 1 times [2023-12-02 18:34:28,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:28,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937067204] [2023-12-02 18:34:28,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:28,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:28,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:28,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937067204] [2023-12-02 18:34:28,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937067204] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:28,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:28,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 18:34:28,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511829786] [2023-12-02 18:34:28,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:28,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:34:28,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:34:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:34:28,694 INFO L87 Difference]: Start difference. First operand 130 states and 151 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:28,874 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2023-12-02 18:34:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:34:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-12-02 18:34:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:28,876 INFO L225 Difference]: With dead ends: 129 [2023-12-02 18:34:28,876 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 18:34:28,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:34:28,876 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 71 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:28,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 101 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 18:34:28,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-02 18:34:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 93 states have internal predecessors, (110), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:28,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2023-12-02 18:34:28,881 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 38 [2023-12-02 18:34:28,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:28,882 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2023-12-02 18:34:28,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:28,882 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2023-12-02 18:34:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 18:34:28,883 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:28,883 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:28,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-12-02 18:34:28,883 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:28,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:28,884 INFO L85 PathProgramCache]: Analyzing trace with hash 356038638, now seen corresponding path program 1 times [2023-12-02 18:34:28,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:28,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100300381] [2023-12-02 18:34:28,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:28,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:34:29,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:29,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100300381] [2023-12-02 18:34:29,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100300381] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:34:29,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:34:29,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 18:34:29,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713987178] [2023-12-02 18:34:29,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:34:29,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:34:29,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:29,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:34:29,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:34:29,031 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:29,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:29,163 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2023-12-02 18:34:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:34:29,164 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-12-02 18:34:29,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:29,164 INFO L225 Difference]: With dead ends: 99 [2023-12-02 18:34:29,164 INFO L226 Difference]: Without dead ends: 99 [2023-12-02 18:34:29,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:34:29,165 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 83 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:29,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 117 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:29,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-12-02 18:34:29,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-12-02 18:34:29,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 91 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:29,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-12-02 18:34:29,169 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 38 [2023-12-02 18:34:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:29,169 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-12-02 18:34:29,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-12-02 18:34:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-12-02 18:34:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 18:34:29,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:29,170 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:29,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-12-02 18:34:29,170 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:29,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1844012828, now seen corresponding path program 1 times [2023-12-02 18:34:29,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:29,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721405634] [2023-12-02 18:34:29,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:29,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:29,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:29,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721405634] [2023-12-02 18:34:29,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721405634] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590819887] [2023-12-02 18:34:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:29,355 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:29,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 18:34:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:29,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:34:29,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:29,558 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:29,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:29,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:29,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590819887] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:29,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741657932] [2023-12-02 18:34:29,648 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-12-02 18:34:29,648 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:29,648 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:29,648 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:29,649 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:30,518 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:30,535 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:30,554 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:33,687 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12758#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (or (< (select |#length| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| 4)) (< |ULTIMATE.start_check_~a#1.offset| 0)) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:34:33,687 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:33,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:33,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2023-12-02 18:34:33,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457519603] [2023-12-02 18:34:33,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:33,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:34:33,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:33,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:34:33,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1348, Unknown=5, NotChecked=0, Total=1482 [2023-12-02 18:34:33,689 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:33,907 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2023-12-02 18:34:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:34:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 39 [2023-12-02 18:34:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:33,909 INFO L225 Difference]: With dead ends: 101 [2023-12-02 18:34:33,909 INFO L226 Difference]: Without dead ends: 101 [2023-12-02 18:34:33,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=180, Invalid=1705, Unknown=7, NotChecked=0, Total=1892 [2023-12-02 18:34:33,909 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 129 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:33,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 173 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-02 18:34:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2023-12-02 18:34:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 91 states have internal predecessors, (107), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 115 transitions. [2023-12-02 18:34:33,912 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 115 transitions. Word has length 39 [2023-12-02 18:34:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:33,912 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 115 transitions. [2023-12-02 18:34:33,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:33,912 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 115 transitions. [2023-12-02 18:34:33,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:34:33,913 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:33,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:33,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 18:34:34,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:34,113 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:34,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1775217483, now seen corresponding path program 2 times [2023-12-02 18:34:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210897791] [2023-12-02 18:34:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:34,342 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:34:34,342 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210897791] [2023-12-02 18:34:34,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210897791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:34,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241836487] [2023-12-02 18:34:34,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:34:34,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:34,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:34,343 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:34,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:34:34,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:34:34,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:34:34,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 18:34:34,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:34:34,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:35,223 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 18:34:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:34:35,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241836487] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:35,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [782337078] [2023-12-02 18:34:35,287 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:35,287 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:35,288 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:35,288 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:35,288 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:35,846 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:35,859 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:35,880 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:38,647 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13260#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:38,648 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:38,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:38,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-12-02 18:34:38,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739933275] [2023-12-02 18:34:38,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:38,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 18:34:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:38,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 18:34:38,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2530, Unknown=8, NotChecked=0, Total=2756 [2023-12-02 18:34:38,649 INFO L87 Difference]: Start difference. First operand 99 states and 115 transitions. Second operand has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 18:34:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:42,026 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2023-12-02 18:34:42,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-12-02 18:34:42,027 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 40 [2023-12-02 18:34:42,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:42,028 INFO L225 Difference]: With dead ends: 159 [2023-12-02 18:34:42,028 INFO L226 Difference]: Without dead ends: 159 [2023-12-02 18:34:42,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1292, Invalid=7441, Unknown=9, NotChecked=0, Total=8742 [2023-12-02 18:34:42,030 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 466 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:42,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 286 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:34:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-12-02 18:34:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 119. [2023-12-02 18:34:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 104 states have (on average 1.2788461538461537) internal successors, (133), 111 states have internal predecessors, (133), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:42,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 141 transitions. [2023-12-02 18:34:42,035 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 141 transitions. Word has length 40 [2023-12-02 18:34:42,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:42,036 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 141 transitions. [2023-12-02 18:34:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-02 18:34:42,036 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2023-12-02 18:34:42,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:34:42,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:42,037 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:42,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 18:34:42,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-12-02 18:34:42,237 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:42,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:42,238 INFO L85 PathProgramCache]: Analyzing trace with hash -734522914, now seen corresponding path program 2 times [2023-12-02 18:34:42,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:42,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777877072] [2023-12-02 18:34:42,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:42,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:34:42,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777877072] [2023-12-02 18:34:42,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777877072] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:42,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902999091] [2023-12-02 18:34:42,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:34:42,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:42,306 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:42,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 18:34:42,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:34:42,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:34:42,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:34:42,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:42,469 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:34:42,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:42,499 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:34:42,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902999091] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:42,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1629968039] [2023-12-02 18:34:42,500 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:34:42,501 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:42,501 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:42,501 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:42,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:43,219 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:43,231 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:43,248 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:47,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13900#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:34:47,411 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:47,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:47,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-02 18:34:47,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695674089] [2023-12-02 18:34:47,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:47,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 18:34:47,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:47,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 18:34:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1002, Unknown=11, NotChecked=0, Total=1122 [2023-12-02 18:34:47,412 INFO L87 Difference]: Start difference. First operand 119 states and 141 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:47,513 INFO L93 Difference]: Finished difference Result 113 states and 131 transitions. [2023-12-02 18:34:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:34:47,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2023-12-02 18:34:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:47,515 INFO L225 Difference]: With dead ends: 113 [2023-12-02 18:34:47,515 INFO L226 Difference]: Without dead ends: 113 [2023-12-02 18:34:47,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=114, Invalid=1065, Unknown=11, NotChecked=0, Total=1190 [2023-12-02 18:34:47,515 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:47,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 295 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:47,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-02 18:34:47,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2023-12-02 18:34:47,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 103 states have internal predecessors, (122), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 130 transitions. [2023-12-02 18:34:47,518 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 130 transitions. Word has length 42 [2023-12-02 18:34:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:47,518 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 130 transitions. [2023-12-02 18:34:47,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 130 transitions. [2023-12-02 18:34:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:34:47,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:47,519 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:47,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 18:34:47,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-12-02 18:34:47,720 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:47,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:47,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1306814923, now seen corresponding path program 1 times [2023-12-02 18:34:47,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:47,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407643039] [2023-12-02 18:34:47,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:47,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:47,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:34:47,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407643039] [2023-12-02 18:34:47,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407643039] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:47,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876342788] [2023-12-02 18:34:47,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:47,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:47,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:47,898 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:47,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 18:34:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:48,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:34:48,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:48,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:34:48,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876342788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:48,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1522118589] [2023-12-02 18:34:48,232 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 18:34:48,232 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:48,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:48,233 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:48,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:49,789 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:49,807 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:49,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:53,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14418#(and (<= 2 |ULTIMATE.start_downsweep_#in~n#1|) (<= 1 |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= 1 |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 2 |ULTIMATE.start_downsweep_~n#1|) (or (< (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4))) (< (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4)) 0)) (<= 2 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647))' at error location [2023-12-02 18:34:53,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:34:53,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:34:53,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2023-12-02 18:34:53,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528199802] [2023-12-02 18:34:53,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:34:53,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:34:53,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:34:53,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:34:53,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2010, Unknown=4, NotChecked=0, Total=2162 [2023-12-02 18:34:53,840 INFO L87 Difference]: Start difference. First operand 111 states and 130 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:54,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:34:54,093 INFO L93 Difference]: Finished difference Result 138 states and 161 transitions. [2023-12-02 18:34:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 18:34:54,093 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-12-02 18:34:54,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:34:54,094 INFO L225 Difference]: With dead ends: 138 [2023-12-02 18:34:54,094 INFO L226 Difference]: Without dead ends: 138 [2023-12-02 18:34:54,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=223, Invalid=2527, Unknown=6, NotChecked=0, Total=2756 [2023-12-02 18:34:54,095 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:34:54,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 262 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 18:34:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-12-02 18:34:54,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 122. [2023-12-02 18:34:54,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 107 states have (on average 1.2616822429906542) internal successors, (135), 114 states have internal predecessors, (135), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:34:54,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 143 transitions. [2023-12-02 18:34:54,099 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 143 transitions. Word has length 43 [2023-12-02 18:34:54,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:34:54,099 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 143 transitions. [2023-12-02 18:34:54,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:34:54,099 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 143 transitions. [2023-12-02 18:34:54,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 18:34:54,099 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:34:54,100 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:34:54,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-02 18:34:54,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-12-02 18:34:54,300 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:34:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:34:54,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1722478511, now seen corresponding path program 1 times [2023-12-02 18:34:54,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:34:54,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488575976] [2023-12-02 18:34:54,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:54,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:34:54,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:34:54,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:34:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488575976] [2023-12-02 18:34:54,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488575976] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:34:54,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270752804] [2023-12-02 18:34:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:34:54,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:34:54,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:34:54,526 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:34:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 18:34:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:34:54,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 18:34:54,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:34:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:34:54,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:34:54,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-12-02 18:34:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:34:54,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270752804] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:34:54,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940149488] [2023-12-02 18:34:54,885 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2023-12-02 18:34:54,885 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:34:54,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:34:54,885 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:34:54,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:34:56,897 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:34:56,914 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:34:56,941 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:34:57,565 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (let ((.cse0 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse1 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_98| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_98| 4294967296) 1))) (.cse2 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse3 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse5 (not (= |c_#Ultimate.meminit_#ptr.base| 0))) (.cse4 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4))) (or (and (exists ((|v_#valid_131| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_131| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_131| |c_#Ultimate.meminit_#ptr.base|) 0))) .cse0 .cse1 .cse2 .cse3 (exists ((|v_#length_122| (Array Int Int))) (= (store |v_#length_122| |c_#Ultimate.meminit_#ptr.base| .cse4) |c_#length|)) .cse5) (and .cse0 .cse1 .cse2 .cse3 .cse5 (exists ((|v_#valid_131| (Array Int Int)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| Int) (|v_#memory_int_489| (Array Int (Array Int Int))) (|v_#length_122| (Array Int Int))) (let ((.cse6 (store |v_#valid_131| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| 1))) (and (= (select .cse6 |c_#Ultimate.meminit_#ptr.base|) 0) (= (select |v_#valid_131| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79|) 0) (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store .cse6 |c_#Ultimate.meminit_#ptr.base| 1)) (= (store (store |v_#length_122| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| .cse4) |c_#Ultimate.meminit_#ptr.base| .cse4) |c_#length|) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| 0)) (= |c_old(#memory_int)| (store |v_#memory_int_489| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_79| ((as const (Array Int Int)) 0))))))))) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-12-02 18:35:00,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15003#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (or (< (select |#length| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| 4)) (< |ULTIMATE.start_check_~a#1.offset| 0)) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:35:00,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:00,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:00,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2023-12-02 18:35:00,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432687306] [2023-12-02 18:35:00,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:00,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:35:00,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:35:00,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2200, Unknown=6, NotChecked=96, Total=2550 [2023-12-02 18:35:00,848 INFO L87 Difference]: Start difference. First operand 122 states and 143 transitions. Second operand has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:35:01,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:01,289 INFO L93 Difference]: Finished difference Result 127 states and 145 transitions. [2023-12-02 18:35:01,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:35:01,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 45 [2023-12-02 18:35:01,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:01,290 INFO L225 Difference]: With dead ends: 127 [2023-12-02 18:35:01,290 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 18:35:01,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 90 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=429, Invalid=3109, Unknown=6, NotChecked=116, Total=3660 [2023-12-02 18:35:01,291 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 261 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:01,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 143 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:01,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 18:35:01,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2023-12-02 18:35:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 109 states have (on average 1.2477064220183487) internal successors, (136), 116 states have internal predecessors, (136), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:01,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2023-12-02 18:35:01,294 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 45 [2023-12-02 18:35:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:01,295 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2023-12-02 18:35:01,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.578947368421052) internal successors, (87), 20 states have internal predecessors, (87), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-02 18:35:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2023-12-02 18:35:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 18:35:01,296 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:01,296 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 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 18:35:01,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-12-02 18:35:01,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:01,496 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:01,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash 732010031, now seen corresponding path program 3 times [2023-12-02 18:35:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:01,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142272148] [2023-12-02 18:35:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:01,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:01,695 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:35:01,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142272148] [2023-12-02 18:35:01,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142272148] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:01,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975303106] [2023-12-02 18:35:01,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:35:01,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:01,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:01,696 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:01,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 18:35:01,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:35:01,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:35:01,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:35:01,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:35:02,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:02,160 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 28 treesize of output 24 [2023-12-02 18:35:02,375 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:35:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975303106] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:02,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1946507423] [2023-12-02 18:35:02,377 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:35:02,377 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:02,377 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:02,377 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:02,377 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:02,965 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:02,980 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:03,002 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:05,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15607#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:35:05,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:05,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:05,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-12-02 18:35:05,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499438255] [2023-12-02 18:35:05,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:05,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 18:35:05,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 18:35:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2597, Unknown=7, NotChecked=0, Total=2862 [2023-12-02 18:35:05,818 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:35:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:07,839 INFO L93 Difference]: Finished difference Result 161 states and 187 transitions. [2023-12-02 18:35:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 18:35:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 46 [2023-12-02 18:35:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:07,840 INFO L225 Difference]: With dead ends: 161 [2023-12-02 18:35:07,840 INFO L226 Difference]: Without dead ends: 161 [2023-12-02 18:35:07,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1043, Invalid=6954, Unknown=13, NotChecked=0, Total=8010 [2023-12-02 18:35:07,841 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 212 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:07,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 273 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:35:07,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-02 18:35:07,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 125. [2023-12-02 18:35:07,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 110 states have (on average 1.2454545454545454) internal successors, (137), 117 states have internal predecessors, (137), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:07,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 145 transitions. [2023-12-02 18:35:07,844 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 145 transitions. Word has length 46 [2023-12-02 18:35:07,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:07,844 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 145 transitions. [2023-12-02 18:35:07,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 32 states have internal predecessors, (71), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:35:07,844 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 145 transitions. [2023-12-02 18:35:07,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 18:35:07,845 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:07,845 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:07,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 18:35:08,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:08,045 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:08,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:08,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1739507281, now seen corresponding path program 1 times [2023-12-02 18:35:08,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:08,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287227327] [2023-12-02 18:35:08,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:08,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:10,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287227327] [2023-12-02 18:35:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287227327] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571556299] [2023-12-02 18:35:10,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:10,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:10,344 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:10,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 18:35:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:10,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 72 conjunts are in the unsatisfiable core [2023-12-02 18:35:10,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:10,712 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 18:35:10,883 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 3 [2023-12-02 18:35:10,950 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 18:35:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:35:11,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:11,160 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 36 treesize of output 32 [2023-12-02 18:35:11,420 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 33 treesize of output 31 [2023-12-02 18:35:11,424 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 36 treesize of output 29 [2023-12-02 18:35:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:35:11,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571556299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440183447] [2023-12-02 18:35:11,761 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 18:35:11,762 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:11,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:11,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:11,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:13,913 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:13,926 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:13,943 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:16,148 WARN L876 $PredicateComparison]: unable to prove that (and (let ((.cse7 ((as const (Array Int Int)) 0)) (.cse0 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse1 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse3 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse4 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse5 (exists ((|v_#length_126| (Array Int Int))) (= (let ((.cse10 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_126| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse10) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse10)) |c_#length|))) (.cse6 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_106| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_106| 4294967296) 1))) (.cse8 (exists ((|v_#valid_135| (Array Int Int))) (let ((.cse9 (store |v_#valid_135| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= |c_#valid| (store .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select .cse9 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0) (= (select |v_#valid_135| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0)))))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 (exists ((|v_#memory_int_559| (Array Int (Array Int Int)))) (= |c_#memory_int| (store |v_#memory_int_559| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7))) .cse8) (and (exists ((|v_#memory_int_560| (Array Int (Array Int Int)))) (= |c_#memory_int| (store |v_#memory_int_560| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse7))) .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse8))) (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0)) is different from true [2023-12-02 18:35:19,677 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16314#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (not (= |ULTIMATE.start_check_#t~mem11#1| 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:35:19,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:19,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:19,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16, 16] total 50 [2023-12-02 18:35:19,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528351957] [2023-12-02 18:35:19,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:19,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 18:35:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 18:35:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=6175, Unknown=4, NotChecked=158, Total=6642 [2023-12-02 18:35:19,679 INFO L87 Difference]: Start difference. First operand 125 states and 145 transitions. Second operand has 50 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:35:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:28,084 INFO L93 Difference]: Finished difference Result 178 states and 203 transitions. [2023-12-02 18:35:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-02 18:35:28,085 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 47 [2023-12-02 18:35:28,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:28,086 INFO L225 Difference]: With dead ends: 178 [2023-12-02 18:35:28,086 INFO L226 Difference]: Without dead ends: 178 [2023-12-02 18:35:28,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3060 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=733, Invalid=11699, Unknown=4, NotChecked=220, Total=12656 [2023-12-02 18:35:28,087 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 311 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:28,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 486 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:35:28,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-12-02 18:35:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2023-12-02 18:35:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.2377049180327868) internal successors, (151), 129 states have internal predecessors, (151), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 159 transitions. [2023-12-02 18:35:28,090 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 159 transitions. Word has length 47 [2023-12-02 18:35:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:28,090 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 159 transitions. [2023-12-02 18:35:28,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.9787234042553192) internal successors, (93), 48 states have internal predecessors, (93), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:35:28,091 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 159 transitions. [2023-12-02 18:35:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-12-02 18:35:28,091 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:28,091 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:28,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-02 18:35:28,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:28,292 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:28,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1163238027, now seen corresponding path program 2 times [2023-12-02 18:35:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:28,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874235551] [2023-12-02 18:35:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:28,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:35:28,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874235551] [2023-12-02 18:35:28,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874235551] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:28,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570865152] [2023-12-02 18:35:28,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:35:28,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:28,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:28,449 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:28,450 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-02 18:35:28,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 18:35:28,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:35:28,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 18:35:28,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:28,689 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:35:28,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:28,795 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:35:28,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570865152] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:28,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007094471] [2023-12-02 18:35:28,797 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 18:35:28,797 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:28,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:28,797 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:28,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:30,281 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:30,293 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:30,311 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:39,685 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17030#(and (<= 2 |ULTIMATE.start_downsweep_#in~n#1|) (<= 1 |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= 1 |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 2 |ULTIMATE.start_downsweep_~n#1|) (or (< (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4))) (< (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4)) 0)) (<= 2 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647))' at error location [2023-12-02 18:35:39,685 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:39,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:39,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 19 [2023-12-02 18:35:39,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707313773] [2023-12-02 18:35:39,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:39,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 18:35:39,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 18:35:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2096, Unknown=10, NotChecked=0, Total=2256 [2023-12-02 18:35:39,686 INFO L87 Difference]: Start difference. First operand 137 states and 159 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:40,061 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2023-12-02 18:35:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:35:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 49 [2023-12-02 18:35:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:40,063 INFO L225 Difference]: With dead ends: 182 [2023-12-02 18:35:40,063 INFO L226 Difference]: Without dead ends: 182 [2023-12-02 18:35:40,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=233, Invalid=2835, Unknown=12, NotChecked=0, Total=3080 [2023-12-02 18:35:40,063 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 92 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:40,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 324 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:40,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-12-02 18:35:40,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 143. [2023-12-02 18:35:40,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 128 states have (on average 1.25) internal successors, (160), 135 states have internal predecessors, (160), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2023-12-02 18:35:40,066 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 49 [2023-12-02 18:35:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:40,067 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2023-12-02 18:35:40,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 19 states have internal predecessors, (65), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2023-12-02 18:35:40,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-02 18:35:40,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:40,067 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:40,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-02 18:35:40,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:40,268 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:40,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1212109376, now seen corresponding path program 4 times [2023-12-02 18:35:40,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:40,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568219919] [2023-12-02 18:35:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:40,439 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 37 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:35:40,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568219919] [2023-12-02 18:35:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568219919] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:40,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591071064] [2023-12-02 18:35:40,439 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:35:40,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:40,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:40,441 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:40,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 18:35:40,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:40,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:35:40,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:40,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:40,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591071064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:40,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [305533945] [2023-12-02 18:35:40,762 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:35:40,762 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:40,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:40,762 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:40,763 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:41,381 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:41,394 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:41,412 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:43,990 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17716#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:35:43,990 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:43,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:43,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2023-12-02 18:35:43,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150824908] [2023-12-02 18:35:43,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:43,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 18:35:43,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:43,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 18:35:43,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1733, Unknown=7, NotChecked=0, Total=1892 [2023-12-02 18:35:43,991 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:44,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:44,475 INFO L93 Difference]: Finished difference Result 245 states and 285 transitions. [2023-12-02 18:35:44,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:35:44,476 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 50 [2023-12-02 18:35:44,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:44,477 INFO L225 Difference]: With dead ends: 245 [2023-12-02 18:35:44,478 INFO L226 Difference]: Without dead ends: 245 [2023-12-02 18:35:44,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=271, Invalid=2476, Unknown=9, NotChecked=0, Total=2756 [2023-12-02 18:35:44,478 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 176 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:44,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 478 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-12-02 18:35:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 173. [2023-12-02 18:35:44,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 158 states have (on average 1.259493670886076) internal successors, (199), 165 states have internal predecessors, (199), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:44,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 207 transitions. [2023-12-02 18:35:44,482 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 207 transitions. Word has length 50 [2023-12-02 18:35:44,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:44,482 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 207 transitions. [2023-12-02 18:35:44,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:44,483 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 207 transitions. [2023-12-02 18:35:44,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 18:35:44,483 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:44,483 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:44,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 18:35:44,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-12-02 18:35:44,684 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:44,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:44,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1084071838, now seen corresponding path program 1 times [2023-12-02 18:35:44,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:44,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570354105] [2023-12-02 18:35:44,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:44,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:44,833 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 18:35:44,833 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570354105] [2023-12-02 18:35:44,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570354105] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:44,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484061868] [2023-12-02 18:35:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:44,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:44,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:44,834 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:44,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 18:35:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:44,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:35:44,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 23 proven. 22 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:35:45,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 8 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:35:45,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484061868] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:45,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1913346182] [2023-12-02 18:35:45,111 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:35:45,111 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:45,112 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:45,112 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:45,112 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:45,664 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:45,676 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:45,693 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:48,221 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18492#(and (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:35:48,222 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:48,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:48,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 18 [2023-12-02 18:35:48,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143641606] [2023-12-02 18:35:48,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:48,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:35:48,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:48,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:35:48,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1420, Unknown=10, NotChecked=0, Total=1560 [2023-12-02 18:35:48,223 INFO L87 Difference]: Start difference. First operand 173 states and 207 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:48,801 INFO L93 Difference]: Finished difference Result 240 states and 279 transitions. [2023-12-02 18:35:48,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:35:48,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 51 [2023-12-02 18:35:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:48,802 INFO L225 Difference]: With dead ends: 240 [2023-12-02 18:35:48,802 INFO L226 Difference]: Without dead ends: 240 [2023-12-02 18:35:48,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=278, Invalid=2358, Unknown=16, NotChecked=0, Total=2652 [2023-12-02 18:35:48,803 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 107 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:48,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 367 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-12-02 18:35:48,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 170. [2023-12-02 18:35:48,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 155 states have (on average 1.2451612903225806) internal successors, (193), 162 states have internal predecessors, (193), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:48,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 201 transitions. [2023-12-02 18:35:48,808 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 201 transitions. Word has length 51 [2023-12-02 18:35:48,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:48,808 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 201 transitions. [2023-12-02 18:35:48,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 18 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:48,808 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 201 transitions. [2023-12-02 18:35:48,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 18:35:48,809 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:48,809 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:48,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-12-02 18:35:49,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-12-02 18:35:49,009 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:49,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:49,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1555451672, now seen corresponding path program 3 times [2023-12-02 18:35:49,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:49,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017276403] [2023-12-02 18:35:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:49,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:35:49,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017276403] [2023-12-02 18:35:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017276403] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056934686] [2023-12-02 18:35:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:35:49,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:49,226 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:49,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 18:35:49,327 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:35:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:35:49,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:35:49,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:49,433 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:35:49,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:35:49,527 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-12-02 18:35:49,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056934686] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:35:49,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [926262548] [2023-12-02 18:35:49,529 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:35:49,529 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:35:49,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:35:49,529 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:35:49,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:35:50,182 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:35:50,195 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:35:50,212 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:35:52,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19277#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:35:52,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:35:52,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:35:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 23 [2023-12-02 18:35:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381959666] [2023-12-02 18:35:52,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:35:52,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 18:35:52,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:35:52,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 18:35:52,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1813, Unknown=4, NotChecked=0, Total=1980 [2023-12-02 18:35:52,778 INFO L87 Difference]: Start difference. First operand 170 states and 201 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:53,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:35:53,386 INFO L93 Difference]: Finished difference Result 229 states and 265 transitions. [2023-12-02 18:35:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 18:35:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 52 [2023-12-02 18:35:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:35:53,388 INFO L225 Difference]: With dead ends: 229 [2023-12-02 18:35:53,388 INFO L226 Difference]: Without dead ends: 229 [2023-12-02 18:35:53,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=315, Invalid=2870, Unknown=7, NotChecked=0, Total=3192 [2023-12-02 18:35:53,389 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 103 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:35:53,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 388 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 18:35:53,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-12-02 18:35:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 160. [2023-12-02 18:35:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 145 states have (on average 1.2344827586206897) internal successors, (179), 152 states have internal predecessors, (179), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:35:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 187 transitions. [2023-12-02 18:35:53,392 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 187 transitions. Word has length 52 [2023-12-02 18:35:53,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:35:53,393 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 187 transitions. [2023-12-02 18:35:53,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:35:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 187 transitions. [2023-12-02 18:35:53,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 18:35:53,393 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:35:53,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:35:53,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-12-02 18:35:53,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-12-02 18:35:53,594 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:35:53,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:35:53,594 INFO L85 PathProgramCache]: Analyzing trace with hash -199553497, now seen corresponding path program 1 times [2023-12-02 18:35:53,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:35:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7673398] [2023-12-02 18:35:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:53,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:35:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:56,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:35:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7673398] [2023-12-02 18:35:56,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7673398] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:35:56,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834136874] [2023-12-02 18:35:56,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:35:56,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:35:56,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:35:56,427 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:35:56,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 18:35:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:35:56,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 132 conjunts are in the unsatisfiable core [2023-12-02 18:35:56,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:35:56,656 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 18:35:56,726 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:35:56,727 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 18:35:56,864 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 15 treesize of output 15 [2023-12-02 18:35:56,982 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 18 [2023-12-02 18:35:57,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:35:57,389 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 35 treesize of output 18 [2023-12-02 18:35:57,608 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 23 treesize of output 25 [2023-12-02 18:35:58,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2023-12-02 18:35:58,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2023-12-02 18:35:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:35:58,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:36:16,001 WARN L854 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_upsweep_#t~mem6#1| Int) (v_ArrVal_1022 Int) (|ULTIMATE.start_upsweep_#t~mem5#1| Int) (|ULTIMATE.start_main_~a0~0#1.offset| Int) (|v_ULTIMATE.start_upsweep_~a#1.offset_72| Int) (|v_ULTIMATE.start_upsweep_~right~0#1_144| Int)) (or (< |v_ULTIMATE.start_upsweep_~right~0#1_144| 1) (< |v_ULTIMATE.start_upsweep_~a#1.offset_72| |c_ULTIMATE.start_main_~a~0#1.offset|) (let ((.cse5 (* |c_ULTIMATE.start_main_~i~1#1| 4))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base| (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a0~0#1.base|) (+ |ULTIMATE.start_main_~a0~0#1.offset| .cse5) |c_ULTIMATE.start_main_#t~mem18#1|) (+ |ULTIMATE.start_main_~a0~0#1.offset| 4 .cse5) v_ArrVal_1022)))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_upsweep_~right~0#1_144| 4) |v_ULTIMATE.start_upsweep_~a#1.offset_72|) (+ |ULTIMATE.start_upsweep_#t~mem6#1| |ULTIMATE.start_upsweep_#t~mem5#1|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse5) 0)) (.cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse4 (select .cse1 .cse2))) (let ((.cse3 (+ .cse4 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (= (select (select (store .cse0 |c_ULTIMATE.start_main_~a~0#1.base| (store (store .cse1 .cse2 .cse3) |c_ULTIMATE.start_main_~a~0#1.offset| .cse4)) |c_ULTIMATE.start_main_~a0~0#1.base|) |ULTIMATE.start_main_~a0~0#1.offset|) .cse3)))))))) is different from false [2023-12-02 18:36:16,328 INFO L349 Elim1Store]: treesize reduction 92, result has 47.7 percent of original size [2023-12-02 18:36:16,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 4627102 treesize of output 2779889 [2023-12-02 18:36:20,520 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:36:20,520 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 2918 treesize of output 2732 [2023-12-02 18:36:21,654 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-12-02 18:36:21,655 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 142 treesize of output 131 [2023-12-02 18:36:21,676 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 18:36:21,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:36:21,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 1643 treesize of output 1547 [2023-12-02 18:36:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 1 not checked. [2023-12-02 18:36:26,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834136874] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:36:26,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058402821] [2023-12-02 18:36:26,273 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2023-12-02 18:36:26,273 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:36:26,273 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:36:26,273 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:36:26,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:36:28,505 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:36:28,522 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:36:28,545 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:36:44,804 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20101#(and (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (not (= |ULTIMATE.start_check_#t~mem11#1| |ULTIMATE.start_check_~sum~0#1|)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 1 |ULTIMATE.start_check_#in~n#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))' at error location [2023-12-02 18:36:44,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:36:44,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:36:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 29, 26] total 83 [2023-12-02 18:36:44,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547261282] [2023-12-02 18:36:44,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:36:44,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-02 18:36:44,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:36:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-02 18:36:44,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=12762, Unknown=13, NotChecked=228, Total=13572 [2023-12-02 18:36:44,806 INFO L87 Difference]: Start difference. First operand 160 states and 187 transitions. Second operand has 83 states, 78 states have (on average 1.4743589743589745) internal successors, (115), 80 states have internal predecessors, (115), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 18:37:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:00,768 INFO L93 Difference]: Finished difference Result 190 states and 219 transitions. [2023-12-02 18:37:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-12-02 18:37:00,769 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 78 states have (on average 1.4743589743589745) internal successors, (115), 80 states have internal predecessors, (115), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 52 [2023-12-02 18:37:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:00,769 INFO L225 Difference]: With dead ends: 190 [2023-12-02 18:37:00,770 INFO L226 Difference]: Without dead ends: 190 [2023-12-02 18:37:00,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6839 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=1805, Invalid=22991, Unknown=14, NotChecked=312, Total=25122 [2023-12-02 18:37:00,772 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 860 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 2057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:00,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 565 Invalid, 2057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1854 Invalid, 0 Unknown, 106 Unchecked, 4.9s Time] [2023-12-02 18:37:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-02 18:37:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 165. [2023-12-02 18:37:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 157 states have internal predecessors, (184), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:37:00,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 192 transitions. [2023-12-02 18:37:00,775 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 192 transitions. Word has length 52 [2023-12-02 18:37:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:00,775 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 192 transitions. [2023-12-02 18:37:00,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 78 states have (on average 1.4743589743589745) internal successors, (115), 80 states have internal predecessors, (115), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-12-02 18:37:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 192 transitions. [2023-12-02 18:37:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 18:37:00,776 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:00,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:00,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 18:37:00,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-12-02 18:37:00,976 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:37:00,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:00,977 INFO L85 PathProgramCache]: Analyzing trace with hash -308701423, now seen corresponding path program 2 times [2023-12-02 18:37:00,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:00,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639119734] [2023-12-02 18:37:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:00,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:01,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:37:01,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639119734] [2023-12-02 18:37:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639119734] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200109069] [2023-12-02 18:37:01,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:37:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:01,295 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:01,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 18:37:01,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:37:01,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:37:01,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-02 18:37:01,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:02,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-12-02 18:37:02,376 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 3 [2023-12-02 18:37:02,519 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 18:37:02,803 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:37:02,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:37:03,110 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 36 treesize of output 32 [2023-12-02 18:37:03,617 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 33 treesize of output 31 [2023-12-02 18:37:03,625 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 36 treesize of output 29 [2023-12-02 18:37:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:37:04,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200109069] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:37:04,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [813062998] [2023-12-02 18:37:04,564 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 18:37:04,564 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:37:04,564 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:37:04,565 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:37:04,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:37:06,653 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:37:06,673 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:37:06,701 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:37:16,936 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20923#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (not (= |ULTIMATE.start_check_#t~mem11#1| 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:37:16,936 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:37:16,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:37:16,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 14] total 37 [2023-12-02 18:37:16,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044050931] [2023-12-02 18:37:16,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:37:16,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 18:37:16,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 18:37:16,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4433, Unknown=9, NotChecked=0, Total=4692 [2023-12-02 18:37:16,937 INFO L87 Difference]: Start difference. First operand 165 states and 192 transitions. Second operand has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:37:23,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:23,067 INFO L93 Difference]: Finished difference Result 206 states and 231 transitions. [2023-12-02 18:37:23,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 18:37:23,067 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 53 [2023-12-02 18:37:23,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:23,069 INFO L225 Difference]: With dead ends: 206 [2023-12-02 18:37:23,069 INFO L226 Difference]: Without dead ends: 206 [2023-12-02 18:37:23,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=628, Invalid=8865, Unknown=13, NotChecked=0, Total=9506 [2023-12-02 18:37:23,070 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 355 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1659 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:23,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 618 Invalid, 1670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1659 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 18:37:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-12-02 18:37:23,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2023-12-02 18:37:23,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 139 states have (on average 1.2014388489208634) internal successors, (167), 146 states have internal predecessors, (167), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:37:23,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2023-12-02 18:37:23,074 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 53 [2023-12-02 18:37:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:23,074 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2023-12-02 18:37:23,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 18:37:23,075 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2023-12-02 18:37:23,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-02 18:37:23,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:23,076 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:23,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 18:37:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-12-02 18:37:23,276 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:37:23,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1891184970, now seen corresponding path program 1 times [2023-12-02 18:37:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613369281] [2023-12-02 18:37:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:37:23,644 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613369281] [2023-12-02 18:37:23,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613369281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:23,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111716054] [2023-12-02 18:37:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:23,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:23,645 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:23,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-12-02 18:37:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:23,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:37:23,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:37:24,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:37:24,593 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 24 treesize of output 20 [2023-12-02 18:37:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:37:24,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111716054] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:37:24,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1741328093] [2023-12-02 18:37:24,811 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 18:37:24,811 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:37:24,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:37:24,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:37:24,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:37:27,035 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:37:27,048 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:37:27,066 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:37:37,528 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21707#(and (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (or (< (+ (* |ULTIMATE.start_check_~i~0#1| 4) |ULTIMATE.start_check_~a0#1.offset|) 0) (< (select |#length| |ULTIMATE.start_check_~a0#1.base|) (+ (* |ULTIMATE.start_check_~i~0#1| 4) 4 |ULTIMATE.start_check_~a0#1.offset|))) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 1 |ULTIMATE.start_check_#in~n#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (= |ULTIMATE.start_check_~sum~0#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)))) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_check_~n#1|) (<= (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4))))' at error location [2023-12-02 18:37:37,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:37:37,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:37:37,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-12-02 18:37:37,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107606370] [2023-12-02 18:37:37,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:37:37,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:37:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:37,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:37:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2632, Unknown=7, NotChecked=0, Total=2862 [2023-12-02 18:37:37,530 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 20 states, 19 states have (on average 6.052631578947368) internal successors, (115), 20 states have internal predecessors, (115), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 18:37:38,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:38,447 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2023-12-02 18:37:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:37:38,448 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.052631578947368) internal successors, (115), 20 states have internal predecessors, (115), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2023-12-02 18:37:38,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:38,448 INFO L225 Difference]: With dead ends: 161 [2023-12-02 18:37:38,449 INFO L226 Difference]: Without dead ends: 161 [2023-12-02 18:37:38,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=292, Invalid=3122, Unknown=8, NotChecked=0, Total=3422 [2023-12-02 18:37:38,449 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 250 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:38,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 142 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:37:38,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-12-02 18:37:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 157. [2023-12-02 18:37:38,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 142 states have (on average 1.204225352112676) internal successors, (171), 149 states have internal predecessors, (171), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:37:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 179 transitions. [2023-12-02 18:37:38,454 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 179 transitions. Word has length 53 [2023-12-02 18:37:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:38,454 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 179 transitions. [2023-12-02 18:37:38,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.052631578947368) internal successors, (115), 20 states have internal predecessors, (115), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-02 18:37:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 179 transitions. [2023-12-02 18:37:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-02 18:37:38,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:38,455 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:38,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-12-02 18:37:38,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-12-02 18:37:38,656 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:37:38,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:38,656 INFO L85 PathProgramCache]: Analyzing trace with hash -657533585, now seen corresponding path program 1 times [2023-12-02 18:37:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534119780] [2023-12-02 18:37:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:38,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:37:38,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534119780] [2023-12-02 18:37:38,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534119780] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:38,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910848271] [2023-12-02 18:37:38,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:38,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:38,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:38,963 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:38,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 18:37:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:39,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:37:39,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:37:39,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:37:39,584 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:37:39,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910848271] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:37:39,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [824863012] [2023-12-02 18:37:39,586 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2023-12-02 18:37:39,586 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:37:39,586 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:37:39,586 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:37:39,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:37:41,852 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:37:41,865 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:37:41,884 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:37:53,486 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22408#(and (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 |ULTIMATE.start_check_~i~0#1|) (<= 1 |ULTIMATE.start_check_#in~n#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= 1 |ULTIMATE.start_check_~n#1|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (or (< (select |#length| |ULTIMATE.start_check_~a#1.base|) (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4) 4)) (< (+ |ULTIMATE.start_check_~a#1.offset| (* |ULTIMATE.start_check_~i~0#1| 4)) 0)))' at error location [2023-12-02 18:37:53,486 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:37:53,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:37:53,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 15 [2023-12-02 18:37:53,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889138818] [2023-12-02 18:37:53,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:37:53,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:37:53,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:37:53,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:37:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2185, Unknown=9, NotChecked=0, Total=2352 [2023-12-02 18:37:53,488 INFO L87 Difference]: Start difference. First operand 157 states and 179 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:37:54,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:37:54,249 INFO L93 Difference]: Finished difference Result 160 states and 181 transitions. [2023-12-02 18:37:54,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:37:54,249 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2023-12-02 18:37:54,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:37:54,250 INFO L225 Difference]: With dead ends: 160 [2023-12-02 18:37:54,250 INFO L226 Difference]: Without dead ends: 132 [2023-12-02 18:37:54,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 121 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=191, Invalid=2556, Unknown=9, NotChecked=0, Total=2756 [2023-12-02 18:37:54,251 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 41 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:37:54,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 374 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:37:54,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-12-02 18:37:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-12-02 18:37:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 124 states have internal predecessors, (143), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:37:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 151 transitions. [2023-12-02 18:37:54,255 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 151 transitions. Word has length 55 [2023-12-02 18:37:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:37:54,255 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 151 transitions. [2023-12-02 18:37:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:37:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 151 transitions. [2023-12-02 18:37:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-02 18:37:54,256 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:37:54,256 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:37:54,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 18:37:54,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:54,456 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:37:54,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:37:54,457 INFO L85 PathProgramCache]: Analyzing trace with hash -797235968, now seen corresponding path program 5 times [2023-12-02 18:37:54,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:37:54,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588824745] [2023-12-02 18:37:54,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:37:54,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:37:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:37:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-12-02 18:37:54,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:37:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588824745] [2023-12-02 18:37:54,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588824745] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:37:54,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479023311] [2023-12-02 18:37:54,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:37:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:37:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:37:54,641 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:37:54,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 18:37:55,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:37:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:37:55,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 18:37:55,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:37:55,522 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 18:37:57,503 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 17 treesize of output 13 [2023-12-02 18:37:58,268 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 18:37:58,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:37:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 18:37:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479023311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:37:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196228860] [2023-12-02 18:37:59,540 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:37:59,540 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:37:59,540 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:37:59,540 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:37:59,540 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:38:00,133 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:38:00,146 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:38:00,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:38:15,840 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23105#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:38:15,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:38:15,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:38:15,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 33 [2023-12-02 18:38:15,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131365383] [2023-12-02 18:38:15,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:38:15,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 18:38:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 18:38:15,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2770, Unknown=10, NotChecked=0, Total=2970 [2023-12-02 18:38:15,842 INFO L87 Difference]: Start difference. First operand 132 states and 151 transitions. Second operand has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:38:19,226 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 18:38:21,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:38:23,238 WARN L539 Checker$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 18:38:25,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:38:27,338 WARN L539 Checker$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 18:38:34,201 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:38:36,217 WARN L539 Checker$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 18:38:38,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:38:40,858 WARN L539 Checker$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 18:38:43,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:38:45,030 WARN L539 Checker$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 18:38:45,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:38:45,462 INFO L93 Difference]: Finished difference Result 393 states and 445 transitions. [2023-12-02 18:38:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-02 18:38:45,463 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2023-12-02 18:38:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:38:45,464 INFO L225 Difference]: With dead ends: 393 [2023-12-02 18:38:45,464 INFO L226 Difference]: Without dead ends: 393 [2023-12-02 18:38:45,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2406 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=863, Invalid=8054, Unknown=13, NotChecked=0, Total=8930 [2023-12-02 18:38:45,465 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 842 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 41 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:38:45,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 273 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 964 Invalid, 11 Unknown, 0 Unchecked, 24.3s Time] [2023-12-02 18:38:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-02 18:38:45,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 202. [2023-12-02 18:38:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 180 states have (on average 1.211111111111111) internal successors, (218), 188 states have internal predecessors, (218), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:38:45,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 238 transitions. [2023-12-02 18:38:45,470 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 238 transitions. Word has length 56 [2023-12-02 18:38:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:38:45,470 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 238 transitions. [2023-12-02 18:38:45,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.6333333333333333) internal successors, (79), 33 states have internal predecessors, (79), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:38:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 238 transitions. [2023-12-02 18:38:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 18:38:45,471 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:38:45,471 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:38:45,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 18:38:45,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:38:45,672 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:38:45,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:38:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1060245598, now seen corresponding path program 2 times [2023-12-02 18:38:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:38:45,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062657298] [2023-12-02 18:38:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:38:45,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:38:45,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:38:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 18:38:46,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:38:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062657298] [2023-12-02 18:38:46,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062657298] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:38:46,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407246925] [2023-12-02 18:38:46,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:38:46,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:38:46,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:38:46,081 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:38:46,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-12-02 18:38:46,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:38:46,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:38:46,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 18:38:46,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:38:46,246 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 18:38:46,256 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 18:38:46,484 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:38:46,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-12-02 18:38:46,514 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-02 18:38:46,514 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 18:38:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 11 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-12-02 18:38:48,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:38:51,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407246925] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:38:51,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [624961607] [2023-12-02 18:38:51,427 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:38:51,427 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:38:51,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:38:51,428 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:38:51,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:38:52,086 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:38:52,099 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:38:52,124 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:38:54,121 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (let ((.cse2 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_151| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_151| 4294967296) 1))) (.cse3 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse4 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse5 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse6 (not (= |c_#Ultimate.meminit_#ptr.base| 0))) (.cse1 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4))) (or (and (exists ((|v_#valid_163| (Array Int Int)) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| Int) (|v_#memory_int_931| (Array Int (Array Int Int))) (|v_#length_155| (Array Int Int))) (let ((.cse0 (store |v_#valid_163| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| 1))) (and (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| 1) |c_#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| 0)) (= |c_#valid| (store .cse0 |c_#Ultimate.meminit_#ptr.base| 1)) (= (select .cse0 |c_#Ultimate.meminit_#ptr.base|) 0) (= (select |v_#valid_163| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119|) 0) (= (store |v_#memory_int_931| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| ((as const (Array Int Int)) 0)) |c_old(#memory_int)|) (= |c_#length| (store (store |v_#length_155| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_119| .cse1) |c_#Ultimate.meminit_#ptr.base| .cse1))))) .cse2 .cse3 .cse4 .cse5 .cse6) (and .cse2 .cse3 .cse4 .cse5 (exists ((|v_#valid_163| (Array Int Int))) (and (= |c_#valid| (store |v_#valid_163| |c_#Ultimate.meminit_#ptr.base| 1)) (= (select |v_#valid_163| |c_#Ultimate.meminit_#ptr.base|) 0))) .cse6 (exists ((|v_#length_155| (Array Int Int))) (= (store |v_#length_155| |c_#Ultimate.meminit_#ptr.base| .cse1) |c_#length|))))) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4)) is different from true [2023-12-02 18:38:57,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24141#(and (<= 1 |ULTIMATE.start_upsweep_~space~0#1|) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 3)) (= |ULTIMATE.start_is_pow2_#res#1| 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:38:57,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:38:57,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-02 18:38:57,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-12-02 18:38:57,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892623538] [2023-12-02 18:38:57,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-02 18:38:57,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:38:57,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:38:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:38:57,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=3041, Unknown=11, NotChecked=112, Total=3422 [2023-12-02 18:38:57,949 INFO L87 Difference]: Start difference. First operand 202 states and 238 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:39:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:04,962 INFO L93 Difference]: Finished difference Result 239 states and 275 transitions. [2023-12-02 18:39:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-12-02 18:39:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 57 [2023-12-02 18:39:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:04,965 INFO L225 Difference]: With dead ends: 239 [2023-12-02 18:39:04,965 INFO L226 Difference]: Without dead ends: 239 [2023-12-02 18:39:04,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1044, Invalid=6425, Unknown=17, NotChecked=170, Total=7656 [2023-12-02 18:39:04,966 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 434 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 434 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:04,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [434 Valid, 241 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 18:39:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-12-02 18:39:04,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2023-12-02 18:39:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 180 states have (on average 1.1888888888888889) internal successors, (214), 187 states have internal predecessors, (214), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:39:04,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 234 transitions. [2023-12-02 18:39:04,972 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 234 transitions. Word has length 57 [2023-12-02 18:39:04,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:04,972 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 234 transitions. [2023-12-02 18:39:04,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:39:04,972 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 234 transitions. [2023-12-02 18:39:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-02 18:39:04,973 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:04,973 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:04,977 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-12-02 18:39:05,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:05,173 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:39:05,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:05,174 INFO L85 PathProgramCache]: Analyzing trace with hash 2000902184, now seen corresponding path program 4 times [2023-12-02 18:39:05,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:05,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178731722] [2023-12-02 18:39:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 36 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:39:05,673 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:05,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178731722] [2023-12-02 18:39:05,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178731722] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:05,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788907463] [2023-12-02 18:39:05,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:39:05,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:05,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:05,675 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:05,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 18:39:05,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:05,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:39:05,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:39:06,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:06,776 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:39:06,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788907463] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:39:06,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [754307094] [2023-12-02 18:39:06,778 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:39:06,778 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:39:06,778 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:39:06,778 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:39:06,778 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:39:07,405 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:39:07,418 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:39:07,437 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:39:10,575 WARN L876 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_ULTIMATE.start_main_~n~0#1| 1073741823) (= |c_ULTIMATE.start_main_#t~malloc15#1.offset| 0) (= |c_ULTIMATE.start_is_pow2_#res#1| 1) (<= 0 |c_ULTIMATE.start_main_~n~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (let ((.cse0 (exists ((|v_#valid_165| (Array Int Int))) (let ((.cse10 (store |v_#valid_165| |c_ULTIMATE.start_main_#t~malloc15#1.base| 1))) (and (= (select |v_#valid_165| |c_ULTIMATE.start_main_#t~malloc15#1.base|) 0) (= |c_#valid| (store .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base| 1)) (= (select .cse10 |c_ULTIMATE.start_main_#t~malloc16#1.base|) 0))))) (.cse1 (<= (+ |c_ULTIMATE.start_main_#t~malloc15#1.base| 1) |c_#StackHeapBarrier|)) (.cse2 (not (= |c_ULTIMATE.start_main_#t~malloc15#1.base| 0))) (.cse4 (exists ((|v_#length_157| (Array Int Int))) (= (let ((.cse9 (* (mod |c_ULTIMATE.start_main_~n~0#1| 1073741824) 4))) (store (store |v_#length_157| |c_ULTIMATE.start_main_#t~malloc15#1.base| .cse9) |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse9)) |c_#length|))) (.cse5 (not (= |c_ULTIMATE.start_main_#t~malloc16#1.base| 0))) (.cse6 (= |c_ULTIMATE.start_main_#t~malloc15#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse7 (<= (+ |c_ULTIMATE.start_main_#t~malloc16#1.base| 1) |c_#StackHeapBarrier|)) (.cse3 ((as const (Array Int Int)) 0)) (.cse8 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_155| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_155| 4294967296) 1)))) (or (and .cse0 .cse1 .cse2 (exists ((|v_#memory_int_959| (Array Int (Array Int Int)))) (= (store |v_#memory_int_959| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse3) |c_#memory_int|)) .cse4 .cse5 .cse6 .cse7 .cse8) (and .cse0 .cse1 .cse2 .cse4 .cse5 .cse6 .cse7 (exists ((|v_#memory_int_960| (Array Int (Array Int Int)))) (= (store |v_#memory_int_960| |c_ULTIMATE.start_main_#t~malloc16#1.base| .cse3) |c_#memory_int|)) .cse8)))) is different from true [2023-12-02 18:39:12,833 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25030#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:39:12,833 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:39:12,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:39:12,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 27 [2023-12-02 18:39:12,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367886224] [2023-12-02 18:39:12,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:39:12,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:39:12,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:12,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:39:12,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2061, Unknown=6, NotChecked=92, Total=2352 [2023-12-02 18:39:12,835 INFO L87 Difference]: Start difference. First operand 201 states and 234 transitions. Second operand has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:14,803 INFO L93 Difference]: Finished difference Result 334 states and 384 transitions. [2023-12-02 18:39:14,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 18:39:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 58 [2023-12-02 18:39:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:14,806 INFO L225 Difference]: With dead ends: 334 [2023-12-02 18:39:14,806 INFO L226 Difference]: Without dead ends: 334 [2023-12-02 18:39:14,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 135 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=446, Invalid=3708, Unknown=10, NotChecked=126, Total=4290 [2023-12-02 18:39:14,807 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 133 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:14,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 423 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:39:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-02 18:39:14,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 248. [2023-12-02 18:39:14,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 227 states have (on average 1.1806167400881058) internal successors, (268), 234 states have internal predecessors, (268), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:39:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 288 transitions. [2023-12-02 18:39:14,815 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 288 transitions. Word has length 58 [2023-12-02 18:39:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:14,816 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 288 transitions. [2023-12-02 18:39:14,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.2222222222222223) internal successors, (87), 27 states have internal predecessors, (87), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:14,816 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 288 transitions. [2023-12-02 18:39:14,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 18:39:14,817 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:14,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:14,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 18:39:15,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:15,018 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:39:15,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:15,018 INFO L85 PathProgramCache]: Analyzing trace with hash -314491424, now seen corresponding path program 3 times [2023-12-02 18:39:15,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:15,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887310397] [2023-12-02 18:39:15,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:15,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 18:39:15,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887310397] [2023-12-02 18:39:15,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887310397] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:15,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582136087] [2023-12-02 18:39:15,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:39:15,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:15,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:15,486 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:15,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 18:39:15,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:39:15,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:39:15,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:39:15,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 18:39:16,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:16,614 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-12-02 18:39:16,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582136087] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:39:16,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [719899243] [2023-12-02 18:39:16,615 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-12-02 18:39:16,616 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:39:16,616 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:39:16,616 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:39:16,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:39:18,137 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:39:18,150 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:39:18,169 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:39:26,871 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26039#(and (<= 2 |ULTIMATE.start_downsweep_#in~n#1|) (<= 1 |ULTIMATE.start_downsweep_~space#1|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_downsweep_#in~space#1| 2147483648)) (<= |ULTIMATE.start_downsweep_#in~space#1| 2147483647) (<= 1 |ULTIMATE.start_downsweep_~right~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (<= 2 |ULTIMATE.start_downsweep_~n#1|) (or (< (select |#length| |ULTIMATE.start_downsweep_~a#1.base|) (+ |ULTIMATE.start_downsweep_~a#1.offset| 4 (* |ULTIMATE.start_downsweep_~right~1#1| 4))) (< (+ |ULTIMATE.start_downsweep_~a#1.offset| (* |ULTIMATE.start_downsweep_~right~1#1| 4)) 0)) (<= 2 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647))' at error location [2023-12-02 18:39:26,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:39:26,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:39:26,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 23 [2023-12-02 18:39:26,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329925670] [2023-12-02 18:39:26,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:39:26,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 18:39:26,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 18:39:26,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2473, Unknown=6, NotChecked=0, Total=2652 [2023-12-02 18:39:26,873 INFO L87 Difference]: Start difference. First operand 248 states and 288 transitions. Second operand has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:29,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:29,335 INFO L93 Difference]: Finished difference Result 255 states and 297 transitions. [2023-12-02 18:39:29,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-02 18:39:29,335 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2023-12-02 18:39:29,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:29,337 INFO L225 Difference]: With dead ends: 255 [2023-12-02 18:39:29,337 INFO L226 Difference]: Without dead ends: 255 [2023-12-02 18:39:29,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=380, Invalid=3904, Unknown=6, NotChecked=0, Total=4290 [2023-12-02 18:39:29,338 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:29,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 302 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 18:39:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-12-02 18:39:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 249. [2023-12-02 18:39:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 231 states have (on average 1.1688311688311688) internal successors, (270), 235 states have internal predecessors, (270), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:39:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 290 transitions. [2023-12-02 18:39:29,344 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 290 transitions. Word has length 59 [2023-12-02 18:39:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:29,345 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 290 transitions. [2023-12-02 18:39:29,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.1739130434782608) internal successors, (73), 23 states have internal predecessors, (73), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 290 transitions. [2023-12-02 18:39:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 18:39:29,346 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:29,346 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:29,352 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 18:39:29,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-12-02 18:39:29,547 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:39:29,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:29,547 INFO L85 PathProgramCache]: Analyzing trace with hash 672886394, now seen corresponding path program 6 times [2023-12-02 18:39:29,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:29,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000585138] [2023-12-02 18:39:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:29,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:30,002 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-12-02 18:39:30,002 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000585138] [2023-12-02 18:39:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000585138] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:30,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709349717] [2023-12-02 18:39:30,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:39:30,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:30,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:30,003 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:30,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-12-02 18:39:30,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:39:30,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:39:30,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:39:30,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:39:30,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 18:39:30,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709349717] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:39:30,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136665488] [2023-12-02 18:39:30,953 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:39:30,953 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:39:30,953 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:39:30,953 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:39:30,953 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:39:31,602 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:39:31,616 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:39:31,634 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:39:40,708 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26988#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:39:40,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:39:40,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:39:40,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2023-12-02 18:39:40,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021884319] [2023-12-02 18:39:40,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:39:40,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-02 18:39:40,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:40,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-02 18:39:40,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1556, Unknown=5, NotChecked=0, Total=1722 [2023-12-02 18:39:40,710 INFO L87 Difference]: Start difference. First operand 249 states and 290 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:42,487 INFO L93 Difference]: Finished difference Result 310 states and 357 transitions. [2023-12-02 18:39:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 18:39:42,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 62 [2023-12-02 18:39:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:42,490 INFO L225 Difference]: With dead ends: 310 [2023-12-02 18:39:42,490 INFO L226 Difference]: Without dead ends: 290 [2023-12-02 18:39:42,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 149 SyntacticMatches, 10 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=347, Invalid=2403, Unknown=6, NotChecked=0, Total=2756 [2023-12-02 18:39:42,491 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 183 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:42,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 440 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 18:39:42,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-02 18:39:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 235. [2023-12-02 18:39:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 217 states have (on average 1.1566820276497696) internal successors, (251), 221 states have internal predecessors, (251), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:39:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 271 transitions. [2023-12-02 18:39:42,496 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 271 transitions. Word has length 62 [2023-12-02 18:39:42,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:42,497 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 271 transitions. [2023-12-02 18:39:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 20 states have internal predecessors, (70), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:39:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 271 transitions. [2023-12-02 18:39:42,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-02 18:39:42,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:42,497 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:42,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-12-02 18:39:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-12-02 18:39:42,698 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:39:42,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -412609551, now seen corresponding path program 7 times [2023-12-02 18:39:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729642891] [2023-12-02 18:39:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-12-02 18:39:43,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:39:43,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729642891] [2023-12-02 18:39:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729642891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:39:43,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552969047] [2023-12-02 18:39:43,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:39:43,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:39:43,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:39:43,334 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:39:43,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 18:39:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:39:43,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 18:39:43,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:39:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 18:39:45,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:39:46,155 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 5 proven. 52 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-02 18:39:46,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552969047] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:39:46,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [769519056] [2023-12-02 18:39:46,157 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:39:46,157 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:39:46,157 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:39:46,157 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:39:46,158 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:39:46,760 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:39:46,773 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:39:46,792 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:39:48,965 WARN L876 $PredicateComparison]: unable to prove that (and (<= 0 |c_#Ultimate.meminit_#product|) (<= 0 |c_#Ultimate.meminit_#amountOfFields|) (= |c_#Ultimate.meminit_#ptr.offset| 0) (<= 1 |c_#StackHeapBarrier|) (<= |c_#Ultimate.meminit_#product| 4294967292) (<= |c_#Ultimate.meminit_#amountOfFields| 1073741823) (= |c_#Ultimate.meminit_#sizeOfFields| 4) (let ((.cse1 (= |c_old(#memory_int)| |c_#memory_int|)) (.cse2 (<= (+ |c_#Ultimate.meminit_#ptr.base| 1) |c_#StackHeapBarrier|)) (.cse3 (exists ((|v_ULTIMATE.start_is_pow2_~x#1_173| Int)) (= (mod |v_ULTIMATE.start_is_pow2_~x#1_173| 4294967296) 1))) (.cse4 (= (* |c_#Ultimate.meminit_#amountOfFields| 4) |c_#Ultimate.meminit_#product|)) (.cse0 (* (mod |c_#Ultimate.meminit_#amountOfFields| 1073741824) 4)) (.cse5 (not (= |c_#Ultimate.meminit_#ptr.base| 0)))) (or (and (exists ((|v_#length_165| (Array Int Int))) (= (store |v_#length_165| |c_#Ultimate.meminit_#ptr.base| .cse0) |c_#length|)) (exists ((|v_#valid_173| (Array Int Int))) (and (= (select |v_#valid_173| |c_#Ultimate.meminit_#ptr.base|) 0) (= |c_#valid| (store |v_#valid_173| |c_#Ultimate.meminit_#ptr.base| 1)))) .cse1 .cse2 .cse3 .cse4 .cse5) (and .cse1 .cse2 .cse3 .cse4 (exists ((|v_#valid_173| (Array Int Int)) (|v_#memory_int_1039| (Array Int (Array Int Int))) (|v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| Int) (|v_#length_165| (Array Int Int))) (let ((.cse6 (store |v_#valid_173| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| 1))) (and (= (store |v_#memory_int_1039| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| ((as const (Array Int Int)) 0)) |c_old(#memory_int)|) (= (store (store |v_#length_165| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| .cse0) |c_#Ultimate.meminit_#ptr.base| .cse0) |c_#length|) (= |c_#valid| (store .cse6 |c_#Ultimate.meminit_#ptr.base| 1)) (= (select .cse6 |c_#Ultimate.meminit_#ptr.base|) 0) (= (select |v_#valid_173| |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131|) 0) (<= (+ |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| 1) |c_#StackHeapBarrier|) (not (= |v_ULTIMATE.start_main_~a~0#1.base_BEFORE_CALL_131| 0))))) .cse5)))) is different from true [2023-12-02 18:39:53,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27978#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:39:53,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:39:53,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:39:53,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 35 [2023-12-02 18:39:53,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365584789] [2023-12-02 18:39:53,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:39:53,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-02 18:39:53,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:39:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-02 18:39:53,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=2777, Unknown=7, NotChecked=108, Total=3192 [2023-12-02 18:39:53,127 INFO L87 Difference]: Start difference. First operand 235 states and 271 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 18:39:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:39:59,721 INFO L93 Difference]: Finished difference Result 348 states and 390 transitions. [2023-12-02 18:39:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-12-02 18:39:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 62 [2023-12-02 18:39:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:39:59,724 INFO L225 Difference]: With dead ends: 348 [2023-12-02 18:39:59,724 INFO L226 Difference]: Without dead ends: 348 [2023-12-02 18:39:59,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2047 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=840, Invalid=6810, Unknown=10, NotChecked=172, Total=7832 [2023-12-02 18:39:59,725 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 279 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 1264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:39:59,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 754 Invalid, 1264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 18:39:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-02 18:39:59,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 209. [2023-12-02 18:39:59,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 195 states have internal predecessors, (218), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:39:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 238 transitions. [2023-12-02 18:39:59,732 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 238 transitions. Word has length 62 [2023-12-02 18:39:59,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:39:59,732 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 238 transitions. [2023-12-02 18:39:59,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-12-02 18:39:59,733 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 238 transitions. [2023-12-02 18:39:59,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 18:39:59,733 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:39:59,734 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:39:59,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 18:39:59,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-12-02 18:39:59,934 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:39:59,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:39:59,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1515616282, now seen corresponding path program 3 times [2023-12-02 18:39:59,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:39:59,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367058254] [2023-12-02 18:39:59,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:39:59,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:39:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:40:00,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367058254] [2023-12-02 18:40:00,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367058254] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:00,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974969359] [2023-12-02 18:40:00,332 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:40:00,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:00,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:00,333 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:00,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 18:40:00,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:40:00,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:40:00,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:40:00,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:00,901 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:40:00,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:40:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-02 18:40:01,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974969359] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:40:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914502943] [2023-12-02 18:40:01,376 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 18:40:01,376 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:40:01,376 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:40:01,376 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:40:01,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:40:03,419 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:40:03,433 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:40:03,451 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:40:11,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29011#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (not (= |ULTIMATE.start_check_#t~mem11#1| 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:40:11,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:40:11,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:40:11,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 18 [2023-12-02 18:40:11,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974265417] [2023-12-02 18:40:11,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:40:11,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 18:40:11,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:11,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 18:40:11,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2256, Unknown=9, NotChecked=0, Total=2450 [2023-12-02 18:40:11,187 INFO L87 Difference]: Start difference. First operand 209 states and 238 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:40:12,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:12,574 INFO L93 Difference]: Finished difference Result 221 states and 251 transitions. [2023-12-02 18:40:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-02 18:40:12,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2023-12-02 18:40:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:12,576 INFO L225 Difference]: With dead ends: 221 [2023-12-02 18:40:12,576 INFO L226 Difference]: Without dead ends: 221 [2023-12-02 18:40:12,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 144 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=342, Invalid=3303, Unknown=15, NotChecked=0, Total=3660 [2023-12-02 18:40:12,576 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 133 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:12,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 209 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:40:12,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-12-02 18:40:12,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 215. [2023-12-02 18:40:12,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 197 states have (on average 1.1421319796954315) internal successors, (225), 201 states have internal predecessors, (225), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 18:40:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 245 transitions. [2023-12-02 18:40:12,580 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 245 transitions. Word has length 63 [2023-12-02 18:40:12,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:12,581 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 245 transitions. [2023-12-02 18:40:12,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:40:12,581 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 245 transitions. [2023-12-02 18:40:12,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-02 18:40:12,581 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:12,582 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:12,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 18:40:12,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-12-02 18:40:12,782 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:40:12,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash 380800872, now seen corresponding path program 5 times [2023-12-02 18:40:12,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:12,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459794655] [2023-12-02 18:40:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:12,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:12,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 36 proven. 93 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:40:13,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:13,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459794655] [2023-12-02 18:40:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459794655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:13,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809279459] [2023-12-02 18:40:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:40:13,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:13,437 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:13,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-12-02 18:40:14,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-02 18:40:14,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:40:14,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-02 18:40:14,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:14,680 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 18:40:16,224 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 17 treesize of output 13 [2023-12-02 18:40:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-12-02 18:40:17,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:40:18,602 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-12-02 18:40:18,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809279459] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:40:18,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878638545] [2023-12-02 18:40:18,603 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:40:18,603 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:40:18,603 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:40:18,604 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:40:18,604 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:40:19,225 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:40:19,239 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:40:19,258 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:40:28,418 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29920#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:40:28,418 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:40:28,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:40:28,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 14] total 41 [2023-12-02 18:40:28,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677926872] [2023-12-02 18:40:28,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:40:28,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-12-02 18:40:28,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:28,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-12-02 18:40:28,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3645, Unknown=12, NotChecked=0, Total=3906 [2023-12-02 18:40:28,421 INFO L87 Difference]: Start difference. First operand 215 states and 245 transitions. Second operand has 41 states, 38 states have (on average 2.5) internal successors, (95), 39 states have internal predecessors, (95), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:40:31,796 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 18:40:33,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:40:35,814 WARN L539 Checker$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 18:40:41,908 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:40:44,746 WARN L539 Checker$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 18:40:46,766 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 18:40:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:46,796 INFO L93 Difference]: Finished difference Result 401 states and 451 transitions. [2023-12-02 18:40:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 18:40:46,796 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 2.5) internal successors, (95), 39 states have internal predecessors, (95), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 64 [2023-12-02 18:40:46,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:46,798 INFO L225 Difference]: With dead ends: 401 [2023-12-02 18:40:46,798 INFO L226 Difference]: Without dead ends: 338 [2023-12-02 18:40:46,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2461 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=817, Invalid=8868, Unknown=17, NotChecked=0, Total=9702 [2023-12-02 18:40:46,799 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 204 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 30 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:46,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 445 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1023 Invalid, 6 Unknown, 0 Unchecked, 14.1s Time] [2023-12-02 18:40:46,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-02 18:40:46,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 229. [2023-12-02 18:40:46,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 215 states have (on average 1.130232558139535) internal successors, (243), 218 states have internal predecessors, (243), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:40:46,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 257 transitions. [2023-12-02 18:40:46,804 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 257 transitions. Word has length 64 [2023-12-02 18:40:46,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:46,804 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 257 transitions. [2023-12-02 18:40:46,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 2.5) internal successors, (95), 39 states have internal predecessors, (95), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:40:46,805 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 257 transitions. [2023-12-02 18:40:46,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:40:46,805 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:46,805 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:46,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-12-02 18:40:47,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-12-02 18:40:47,006 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:40:47,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:47,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1186554345, now seen corresponding path program 6 times [2023-12-02 18:40:47,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:47,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991444891] [2023-12-02 18:40:47,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:47,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 18:40:47,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991444891] [2023-12-02 18:40:47,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991444891] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:47,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120590447] [2023-12-02 18:40:47,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 18:40:47,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:47,559 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:47,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 18:40:47,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 18:40:47,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:40:47,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:40:47,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:40:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 18:40:48,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:40:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 117 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 18:40:49,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120590447] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:40:49,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1327564303] [2023-12-02 18:40:49,058 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:40:49,058 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:40:49,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:40:49,058 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:40:49,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:40:49,703 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:40:49,716 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:40:49,735 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:40:55,409 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31075#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:40:55,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:40:55,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:40:55,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-12-02 18:40:55,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014049482] [2023-12-02 18:40:55,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:40:55,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-02 18:40:55,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:40:55,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-02 18:40:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2308, Unknown=13, NotChecked=0, Total=2550 [2023-12-02 18:40:55,411 INFO L87 Difference]: Start difference. First operand 229 states and 257 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:40:58,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:40:58,845 INFO L93 Difference]: Finished difference Result 381 states and 434 transitions. [2023-12-02 18:40:58,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 18:40:58,846 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 68 [2023-12-02 18:40:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:40:58,848 INFO L225 Difference]: With dead ends: 381 [2023-12-02 18:40:58,848 INFO L226 Difference]: Without dead ends: 381 [2023-12-02 18:40:58,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1364 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=611, Invalid=4921, Unknown=18, NotChecked=0, Total=5550 [2023-12-02 18:40:58,849 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 766 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:40:58,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [766 Valid, 556 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-02 18:40:58,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2023-12-02 18:40:58,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 274. [2023-12-02 18:40:58,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 260 states have (on average 1.1307692307692307) internal successors, (294), 263 states have internal predecessors, (294), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:40:58,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 308 transitions. [2023-12-02 18:40:58,855 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 308 transitions. Word has length 68 [2023-12-02 18:40:58,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:40:58,856 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 308 transitions. [2023-12-02 18:40:58,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 29 states have internal predecessors, (84), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2023-12-02 18:40:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 308 transitions. [2023-12-02 18:40:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 18:40:58,857 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:40:58,857 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 5, 5, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:40:58,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 18:40:59,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:59,058 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:40:59,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:40:59,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1167113423, now seen corresponding path program 8 times [2023-12-02 18:40:59,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:40:59,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333024434] [2023-12-02 18:40:59,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:40:59,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:40:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:40:59,695 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 75 proven. 59 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 18:40:59,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:40:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333024434] [2023-12-02 18:40:59,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333024434] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:40:59,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433640936] [2023-12-02 18:40:59,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:40:59,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:40:59,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:40:59,697 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:40:59,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 18:41:00,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 18:41:00,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:41:00,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 18:41:00,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 15 proven. 33 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 18:41:03,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:04,487 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 23 treesize of output 19 [2023-12-02 18:41:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 18:41:05,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433640936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:05,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [839909809] [2023-12-02 18:41:05,679 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:41:05,679 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:05,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:05,680 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:05,680 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:41:06,285 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:41:06,304 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:41:06,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:41:13,587 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32244#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (= |ULTIMATE.start_upsweep_~right~0#1| (+ |ULTIMATE.start_upsweep_~space~0#1| |ULTIMATE.start_upsweep_~left~0#1|)) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:41:13,587 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:41:13,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:41:13,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 42 [2023-12-02 18:41:13,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702381271] [2023-12-02 18:41:13,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:41:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 18:41:13,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 18:41:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=3753, Unknown=11, NotChecked=0, Total=4032 [2023-12-02 18:41:13,589 INFO L87 Difference]: Start difference. First operand 274 states and 308 transitions. Second operand has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:41:37,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:37,277 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2023-12-02 18:41:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-12-02 18:41:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 68 [2023-12-02 18:41:37,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:37,280 INFO L225 Difference]: With dead ends: 351 [2023-12-02 18:41:37,280 INFO L226 Difference]: Without dead ends: 351 [2023-12-02 18:41:37,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4395 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=3506, Invalid=17066, Unknown=20, NotChecked=0, Total=20592 [2023-12-02 18:41:37,281 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 1075 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 2153 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1075 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:37,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1075 Valid, 490 Invalid, 2175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2153 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-12-02 18:41:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2023-12-02 18:41:37,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 296. [2023-12-02 18:41:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 282 states have (on average 1.1347517730496455) internal successors, (320), 285 states have internal predecessors, (320), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:41:37,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 334 transitions. [2023-12-02 18:41:37,286 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 334 transitions. Word has length 68 [2023-12-02 18:41:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:37,286 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 334 transitions. [2023-12-02 18:41:37,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.619047619047619) internal successors, (110), 42 states have internal predecessors, (110), 7 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:41:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 334 transitions. [2023-12-02 18:41:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-02 18:41:37,287 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:37,287 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:37,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-12-02 18:41:37,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:37,488 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:41:37,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash 831714757, now seen corresponding path program 7 times [2023-12-02 18:41:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:37,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682584732] [2023-12-02 18:41:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 100 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:41:38,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682584732] [2023-12-02 18:41:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682584732] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:41:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902691740] [2023-12-02 18:41:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:41:38,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:38,524 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:38,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 18:41:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:38,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 18:41:38,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 126 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:41:40,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:41,082 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 24 treesize of output 20 [2023-12-02 18:41:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 126 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 18:41:42,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902691740] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:42,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [906692370] [2023-12-02 18:41:42,417 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:41:42,417 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:42,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:42,418 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:42,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:41:43,077 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:41:43,090 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:41:43,108 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:41:49,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33555#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:41:49,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:41:49,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:41:49,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-12-02 18:41:49,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206836620] [2023-12-02 18:41:49,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:41:49,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 18:41:49,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:41:49,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 18:41:49,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=6226, Unknown=6, NotChecked=0, Total=6972 [2023-12-02 18:41:49,444 INFO L87 Difference]: Start difference. First operand 296 states and 334 transitions. Second operand has 62 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 62 states have internal predecessors, (168), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:41:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:41:55,430 INFO L93 Difference]: Finished difference Result 436 states and 499 transitions. [2023-12-02 18:41:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 18:41:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 62 states have internal predecessors, (168), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 71 [2023-12-02 18:41:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:41:55,432 INFO L225 Difference]: With dead ends: 436 [2023-12-02 18:41:55,432 INFO L226 Difference]: Without dead ends: 436 [2023-12-02 18:41:55,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4048 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1973, Invalid=10228, Unknown=9, NotChecked=0, Total=12210 [2023-12-02 18:41:55,433 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 453 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1899 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:41:55,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 667 Invalid, 1902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1899 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-12-02 18:41:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2023-12-02 18:41:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 304. [2023-12-02 18:41:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 293 states have internal predecessors, (329), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:41:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 343 transitions. [2023-12-02 18:41:55,440 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 343 transitions. Word has length 71 [2023-12-02 18:41:55,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:41:55,440 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 343 transitions. [2023-12-02 18:41:55,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.7540983606557377) internal successors, (168), 62 states have internal predecessors, (168), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-02 18:41:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 343 transitions. [2023-12-02 18:41:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-02 18:41:55,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:41:55,441 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:41:55,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 18:41:55,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-12-02 18:41:55,642 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:41:55,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:41:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 465487056, now seen corresponding path program 4 times [2023-12-02 18:41:55,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:41:55,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451033498] [2023-12-02 18:41:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:41:55,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:41:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 34 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-12-02 18:41:56,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:41:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451033498] [2023-12-02 18:41:56,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451033498] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:41:56,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089898720] [2023-12-02 18:41:56,177 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 18:41:56,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:41:56,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:41:56,179 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:41:56,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 18:41:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:41:56,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:41:56,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:41:56,786 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 18:41:56,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:41:57,390 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-12-02 18:41:57,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089898720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:41:57,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505223875] [2023-12-02 18:41:57,392 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2023-12-02 18:41:57,392 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:41:57,392 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:41:57,392 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:41:57,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:41:59,422 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:41:59,435 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:41:59,454 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:42:09,134 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34821#(and (= |ULTIMATE.start_check_~a#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_check_#in~n#1| |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start_check_#in~a#1.base| |ULTIMATE.start_main_~a~0#1.base|) (= |ULTIMATE.start_check_#in~a0#1.base| |ULTIMATE.start_check_~a0#1.base|) (<= |ULTIMATE.start_upsweep_#res#1| 2147483647) (= |ULTIMATE.start_check_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_check_~a#1.base|) |ULTIMATE.start_check_~a#1.offset|)) (<= 0 (+ |ULTIMATE.start_upsweep_#res#1| 2147483648)) (= |ULTIMATE.start_check_~sum~0#1| 0) (= |ULTIMATE.start_main_~a0~0#1.base| |ULTIMATE.start_check_#in~a0#1.base|) (= |ULTIMATE.start_check_~i~0#1| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~a~0#1.offset| |ULTIMATE.start_check_#in~a#1.offset|) (= |ULTIMATE.start_main_~n~0#1| |ULTIMATE.start_check_#in~n#1|) (not (= |ULTIMATE.start_check_#t~mem11#1| 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_main_~space~1#1|)) (= (select |#valid| |ULTIMATE.start_check_~a#1.base|) 1) (<= 1 |ULTIMATE.start_check_~n#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 0) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_main_~a0~0#1.offset|) (= |ULTIMATE.start_check_~a#1.base| |ULTIMATE.start_check_#in~a#1.base|) (<= |ULTIMATE.start_main_~space~1#1| 2147483647) (<= 0 |ULTIMATE.start_check_~a#1.offset|) (<= (+ |ULTIMATE.start_check_~a#1.offset| 4) (select |#length| |ULTIMATE.start_check_~a#1.base|)) (= |ULTIMATE.start_check_#in~a0#1.offset| |ULTIMATE.start_check_~a0#1.offset|))' at error location [2023-12-02 18:42:09,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:42:09,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:42:09,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 24 [2023-12-02 18:42:09,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126082684] [2023-12-02 18:42:09,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:09,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 18:42:09,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:09,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 18:42:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2866, Unknown=16, NotChecked=0, Total=3080 [2023-12-02 18:42:09,135 INFO L87 Difference]: Start difference. First operand 304 states and 343 transitions. Second operand has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:42:10,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:42:10,667 INFO L93 Difference]: Finished difference Result 335 states and 376 transitions. [2023-12-02 18:42:10,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 18:42:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 72 [2023-12-02 18:42:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:42:10,669 INFO L225 Difference]: With dead ends: 335 [2023-12-02 18:42:10,669 INFO L226 Difference]: Without dead ends: 335 [2023-12-02 18:42:10,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1151 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=301, Invalid=3840, Unknown=19, NotChecked=0, Total=4160 [2023-12-02 18:42:10,670 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 292 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:42:10,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 363 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 18:42:10,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2023-12-02 18:42:10,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 328. [2023-12-02 18:42:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 314 states have (on average 1.1337579617834395) internal successors, (356), 317 states have internal predecessors, (356), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:42:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 370 transitions. [2023-12-02 18:42:10,676 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 370 transitions. Word has length 72 [2023-12-02 18:42:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:42:10,676 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 370 transitions. [2023-12-02 18:42:10,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.4583333333333335) internal successors, (83), 24 states have internal predecessors, (83), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 18:42:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 370 transitions. [2023-12-02 18:42:10,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-02 18:42:10,677 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:42:10,677 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:42:10,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 18:42:10,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-12-02 18:42:10,878 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:42:10,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:42:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1607708074, now seen corresponding path program 8 times [2023-12-02 18:42:10,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:42:10,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848432553] [2023-12-02 18:42:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:42:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:42:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:42:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 55 proven. 147 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 18:42:11,738 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:42:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848432553] [2023-12-02 18:42:11,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848432553] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:42:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166054137] [2023-12-02 18:42:11,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:42:11,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:42:11,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:42:11,739 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:42:11,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 18:42:13,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 18:42:13,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:42:13,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-02 18:42:13,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:42:13,882 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 18:42:16,309 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 17 treesize of output 13 [2023-12-02 18:42:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 15 proven. 38 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2023-12-02 18:42:18,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:42:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2023-12-02 18:42:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166054137] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:42:20,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1778763510] [2023-12-02 18:42:20,753 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-12-02 18:42:20,754 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 18:42:20,754 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 18:42:20,754 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 18:42:20,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 18:42:21,471 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 73 for LOIs [2023-12-02 18:42:21,485 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 73 for LOIs [2023-12-02 18:42:21,504 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 18:42:37,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36026#(and (= |ULTIMATE.start_upsweep_#t~mem5#1| (select (select |#memory_int| |ULTIMATE.start_upsweep_~a#1.base|) (* 4 |ULTIMATE.start_upsweep_~left~0#1|))) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_upsweep_~n#1|) (= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= (select |#length| |ULTIMATE.start_upsweep_~a#1.base|) (+ (* |ULTIMATE.start_upsweep_~right~0#1| 4) 3)) (= |ULTIMATE.start_main_~a0~0#1.offset| 0) (= |ULTIMATE.start_upsweep_~space~0#1| 1) (<= (+ 1 |ULTIMATE.start_upsweep_~left~0#1|) |ULTIMATE.start_upsweep_~n#1|) (<= |ULTIMATE.start_upsweep_~n#1| 1073741823) (= |ULTIMATE.start_upsweep_#in~a#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc16#1.offset| 0) (<= 2 |ULTIMATE.start_main_~i~1#1|) (= |ULTIMATE.start_upsweep_~a#1.offset| 0) (= |ULTIMATE.start_upsweep_~right~0#1| (+ 1 |ULTIMATE.start_upsweep_~left~0#1|)) (<= (+ (* 4 |ULTIMATE.start_upsweep_~left~0#1|) 4) (select |#length| |ULTIMATE.start_upsweep_~a#1.base|)) (<= |ULTIMATE.start_upsweep_#in~n#1| 1073741823) (<= 2 |ULTIMATE.start_upsweep_#in~n#1|) (<= 0 |ULTIMATE.start_upsweep_~left~0#1|) (= |ULTIMATE.start_is_pow2_#res#1| 1) (= (select |#valid| |ULTIMATE.start_upsweep_~a#1.base|) 1) (<= |ULTIMATE.start_main_~n~0#1| 1073741823) (<= 2 |ULTIMATE.start_main_~n~0#1|) (= |ULTIMATE.start_main_#t~malloc15#1.offset| 0))' at error location [2023-12-02 18:42:37,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 18:42:37,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:42:37,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 16] total 48 [2023-12-02 18:42:37,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462507966] [2023-12-02 18:42:37,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:42:37,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 18:42:37,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 18:42:37,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 18:42:37,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4506, Unknown=10, NotChecked=0, Total=4830 [2023-12-02 18:42:37,336 INFO L87 Difference]: Start difference. First operand 328 states and 370 transitions. Second operand has 48 states, 45 states have (on average 2.577777777777778) internal successors, (116), 46 states have internal predecessors, (116), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:42:41,408 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 18:42:43,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:42:45,427 WARN L539 Checker$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 18:42:59,177 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:43:01,248 WARN L539 Checker$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 18:43:03,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:43:05,324 WARN L539 Checker$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 18:43:07,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:43:09,341 WARN L539 Checker$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 18:43:09,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:43:09,445 INFO L93 Difference]: Finished difference Result 469 states and 534 transitions. [2023-12-02 18:43:09,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-02 18:43:09,446 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.577777777777778) internal successors, (116), 46 states have internal predecessors, (116), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 75 [2023-12-02 18:43:09,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:43:09,448 INFO L225 Difference]: With dead ends: 469 [2023-12-02 18:43:09,448 INFO L226 Difference]: Without dead ends: 417 [2023-12-02 18:43:09,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 176 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3293 ImplicationChecksByTransitivity, 31.1s TimeCoverageRelationStatistics Valid=1219, Invalid=10978, Unknown=13, NotChecked=0, Total=12210 [2023-12-02 18:43:09,449 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 435 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 33 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:43:09,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 454 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1234 Invalid, 9 Unknown, 0 Unchecked, 21.3s Time] [2023-12-02 18:43:09,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2023-12-02 18:43:09,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 264. [2023-12-02 18:43:09,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 249 states have (on average 1.140562248995984) internal successors, (284), 252 states have internal predecessors, (284), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 18:43:09,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 298 transitions. [2023-12-02 18:43:09,454 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 298 transitions. Word has length 75 [2023-12-02 18:43:09,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:43:09,455 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 298 transitions. [2023-12-02 18:43:09,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.577777777777778) internal successors, (116), 46 states have internal predecessors, (116), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-02 18:43:09,455 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 298 transitions. [2023-12-02 18:43:09,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 18:43:09,456 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:43:09,456 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:43:09,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 18:43:09,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-12-02 18:43:09,657 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2023-12-02 18:43:09,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:43:09,657 INFO L85 PathProgramCache]: Analyzing trace with hash -520948837, now seen corresponding path program 5 times [2023-12-02 18:43:09,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 18:43:09,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207387627] [2023-12-02 18:43:09,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:43:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 18:43:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:43:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:43:13,761 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 18:43:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207387627] [2023-12-02 18:43:13,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207387627] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:43:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096273039] [2023-12-02 18:43:13,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 18:43:13,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:43:13,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:43:13,762 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:43:13,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c00e05d7-6782-4245-8ce9-7ab3be2b6477/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 18:43:14,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 18:43:14,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:43:14,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 157 conjunts are in the unsatisfiable core [2023-12-02 18:43:14,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:43:14,761 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 18:43:14,936 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 7 treesize of output 6 [2023-12-02 18:43:15,187 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-12-02 18:43:15,187 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 16 treesize of output 18 [2023-12-02 18:43:15,481 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 15 treesize of output 10 [2023-12-02 18:43:15,643 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 15 treesize of output 10 [2023-12-02 18:43:15,680 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 15 treesize of output 10 [2023-12-02 18:43:15,711 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 15 treesize of output 10 [2023-12-02 18:43:15,746 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 15 treesize of output 10 [2023-12-02 18:43:16,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-12-02 18:43:17,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2023-12-02 18:43:18,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 45 [2023-12-02 18:43:19,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 45 [2023-12-02 18:43:20,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2023-12-02 18:43:21,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 119 [2023-12-02 18:43:23,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 209 treesize of output 182 [2023-12-02 18:43:30,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1711 treesize of output 1580