./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.3.i --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_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/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_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/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_789465ab-f01c-4d52-8f5c-105e819f31be/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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:31:58,871 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:31:58,940 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 16:31:58,946 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:31:58,946 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:31:58,971 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:31:58,972 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:31:58,973 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:31:58,974 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:31:58,974 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:31:58,975 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:31:58,975 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:31:58,976 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:31:58,976 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 16:31:58,977 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:31:58,977 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:31:58,978 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 16:31:58,978 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 16:31:58,979 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:31:58,979 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 16:31:58,980 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 16:31:58,980 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 16:31:58,981 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 16:31:58,981 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 16:31:58,982 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:31:58,982 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:31:58,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:31:58,983 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:31:58,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:31:58,995 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 16:31:58,996 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 16:31:58,996 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 16:31:58,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:31:58,996 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:31:58,997 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:31:58,997 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:31:58,997 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:31:58,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:31:58,997 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:31:58,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:31:58,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:31:58,998 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:31:58,998 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:31:58,999 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 16:31:58,999 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 16:31:58,999 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:31:58,999 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:31:58,999 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:31:58,999 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_789465ab-f01c-4d52-8f5c-105e819f31be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2023-12-02 16:31:59,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:31:59,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:31:59,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:31:59,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:31:59,258 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:31:59,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2023-12-02 16:32:01,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:32:02,151 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:32:02,152 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/sv-benchmarks/c/memsafety/lockfree-3.3.i [2023-12-02 16:32:02,165 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/8de99a247/4b906a2ff57b472abf14396a587a2fce/FLAG20ab4c115 [2023-12-02 16:32:02,176 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/8de99a247/4b906a2ff57b472abf14396a587a2fce [2023-12-02 16:32:02,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:32:02,179 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:32:02,181 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:02,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:32:02,185 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:32:02,186 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f5c3afd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02, skipping insertion in model container [2023-12-02 16:32:02,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,226 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:32:02,471 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:02,482 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:32:02,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:32:02,551 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:32:02,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02 WrapperNode [2023-12-02 16:32:02,552 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:32:02,553 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:02,553 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:32:02,553 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:32:02,560 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,599 INFO L138 Inliner]: procedures = 125, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 127 [2023-12-02 16:32:02,600 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:32:02,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:32:02,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:32:02,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:32:02,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,614 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,615 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,628 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,630 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,633 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:32:02,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:32:02,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:32:02,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:32:02,635 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (1/1) ... [2023-12-02 16:32:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:32:02,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:02,665 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:32:02,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:32:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-02 16:32:02,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:32:02,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 16:32:02,706 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:32:02,706 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:32:02,818 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:32:02,821 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:32:03,078 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:32:03,145 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:32:03,145 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:32:03,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:03 BoogieIcfgContainer [2023-12-02 16:32:03,147 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:32:03,149 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:32:03,149 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:32:03,152 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:32:03,153 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:32:02" (1/3) ... [2023-12-02 16:32:03,153 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f153bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:03, skipping insertion in model container [2023-12-02 16:32:03,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:32:02" (2/3) ... [2023-12-02 16:32:03,154 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f153bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:32:03, skipping insertion in model container [2023-12-02 16:32:03,154 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:03" (3/3) ... [2023-12-02 16:32:03,155 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2023-12-02 16:32:03,176 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:32:03,176 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 16:32:03,221 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:32:03,226 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;@1ce99416, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:32:03,226 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 16:32:03,230 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 16:32:03,235 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:03,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 16:32:03,236 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:03,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 5970601, now seen corresponding path program 1 times [2023-12-02 16:32:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389148169] [2023-12-02 16:32:03,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:03,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:03,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:03,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389148169] [2023-12-02 16:32:03,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389148169] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:03,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:03,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:32:03,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227515893] [2023-12-02 16:32:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:03,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:32:03,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:03,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:32:03,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:32:03,469 INFO L87 Difference]: Start difference. First operand has 49 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 48 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:03,506 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2023-12-02 16:32:03,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:32:03,508 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 16:32:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:03,517 INFO L225 Difference]: With dead ends: 49 [2023-12-02 16:32:03,517 INFO L226 Difference]: Without dead ends: 48 [2023-12-02 16:32:03,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:32:03,522 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:03,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:03,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-12-02 16:32:03,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-12-02 16:32:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 2.107142857142857) internal successors, (59), 47 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2023-12-02 16:32:03,551 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 4 [2023-12-02 16:32:03,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:03,551 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2023-12-02 16:32:03,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,552 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2023-12-02 16:32:03,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 16:32:03,552 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:03,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 16:32:03,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 16:32:03,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:03,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:03,553 INFO L85 PathProgramCache]: Analyzing trace with hash 186155218, now seen corresponding path program 1 times [2023-12-02 16:32:03,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:03,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484169109] [2023-12-02 16:32:03,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:03,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:03,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:03,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484169109] [2023-12-02 16:32:03,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484169109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:03,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:03,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:32:03,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800162017] [2023-12-02 16:32:03,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:03,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:03,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:03,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:03,625 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:03,708 INFO L93 Difference]: Finished difference Result 88 states and 110 transitions. [2023-12-02 16:32:03,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:03,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 16:32:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:03,710 INFO L225 Difference]: With dead ends: 88 [2023-12-02 16:32:03,710 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 16:32:03,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:03,712 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:03,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 69 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 16:32:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2023-12-02 16:32:03,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 67 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2023-12-02 16:32:03,723 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 5 [2023-12-02 16:32:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:03,724 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2023-12-02 16:32:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,724 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2023-12-02 16:32:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 16:32:03,724 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:03,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 16:32:03,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 16:32:03,725 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:03,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:03,726 INFO L85 PathProgramCache]: Analyzing trace with hash 186154026, now seen corresponding path program 1 times [2023-12-02 16:32:03,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:03,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848228790] [2023-12-02 16:32:03,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:03,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:03,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:03,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848228790] [2023-12-02 16:32:03,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848228790] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:03,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:03,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:32:03,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122576051] [2023-12-02 16:32:03,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:03,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:03,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:03,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:03,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:03,787 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:03,839 INFO L93 Difference]: Finished difference Result 124 states and 187 transitions. [2023-12-02 16:32:03,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:03,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 16:32:03,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:03,841 INFO L225 Difference]: With dead ends: 124 [2023-12-02 16:32:03,842 INFO L226 Difference]: Without dead ends: 123 [2023-12-02 16:32:03,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:03,843 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 45 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:03,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-12-02 16:32:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2023-12-02 16:32:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 85 states have (on average 2.0470588235294116) internal successors, (174), 104 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 174 transitions. [2023-12-02 16:32:03,857 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 174 transitions. Word has length 5 [2023-12-02 16:32:03,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:03,857 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 174 transitions. [2023-12-02 16:32:03,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 174 transitions. [2023-12-02 16:32:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 16:32:03,858 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:03,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 16:32:03,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 16:32:03,859 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:03,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1475749101, now seen corresponding path program 1 times [2023-12-02 16:32:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:03,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740214577] [2023-12-02 16:32:03,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:03,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:03,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:03,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:03,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740214577] [2023-12-02 16:32:03,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740214577] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:03,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:03,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:32:03,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738772310] [2023-12-02 16:32:03,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:03,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:03,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:03,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:03,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:03,939 INFO L87 Difference]: Start difference. First operand 105 states and 174 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:04,028 INFO L93 Difference]: Finished difference Result 158 states and 247 transitions. [2023-12-02 16:32:04,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 16:32:04,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:04,030 INFO L225 Difference]: With dead ends: 158 [2023-12-02 16:32:04,030 INFO L226 Difference]: Without dead ends: 158 [2023-12-02 16:32:04,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:04,032 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 48 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:04,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-12-02 16:32:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2023-12-02 16:32:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 121 states have (on average 1.9421487603305785) internal successors, (235), 138 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 235 transitions. [2023-12-02 16:32:04,047 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 235 transitions. Word has length 6 [2023-12-02 16:32:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:04,048 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 235 transitions. [2023-12-02 16:32:04,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,048 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 235 transitions. [2023-12-02 16:32:04,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 16:32:04,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:04,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 16:32:04,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 16:32:04,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:04,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:04,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1475749102, now seen corresponding path program 1 times [2023-12-02 16:32:04,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:04,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439827870] [2023-12-02 16:32:04,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:04,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:04,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:04,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439827870] [2023-12-02 16:32:04,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439827870] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:04,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:04,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:32:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280949169] [2023-12-02 16:32:04,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:04,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:32:04,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:32:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:04,142 INFO L87 Difference]: Start difference. First operand 139 states and 235 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:04,214 INFO L93 Difference]: Finished difference Result 153 states and 238 transitions. [2023-12-02 16:32:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:32:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 16:32:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:04,216 INFO L225 Difference]: With dead ends: 153 [2023-12-02 16:32:04,216 INFO L226 Difference]: Without dead ends: 153 [2023-12-02 16:32:04,216 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:32:04,217 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:04,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:04,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-12-02 16:32:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2023-12-02 16:32:04,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 121 states have (on average 1.8760330578512396) internal successors, (227), 136 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 227 transitions. [2023-12-02 16:32:04,230 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 227 transitions. Word has length 6 [2023-12-02 16:32:04,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:04,230 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 227 transitions. [2023-12-02 16:32:04,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,231 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 227 transitions. [2023-12-02 16:32:04,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:32:04,231 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:04,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 16:32:04,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:04,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1496410121, now seen corresponding path program 1 times [2023-12-02 16:32:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:04,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505134469] [2023-12-02 16:32:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:04,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505134469] [2023-12-02 16:32:04,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505134469] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:04,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:04,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 16:32:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46463325] [2023-12-02 16:32:04,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:32:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:32:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:32:04,304 INFO L87 Difference]: Start difference. First operand 137 states and 227 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:04,386 INFO L93 Difference]: Finished difference Result 194 states and 301 transitions. [2023-12-02 16:32:04,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:32:04,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:32:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:04,389 INFO L225 Difference]: With dead ends: 194 [2023-12-02 16:32:04,389 INFO L226 Difference]: Without dead ends: 194 [2023-12-02 16:32:04,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 16:32:04,390 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 40 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:04,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 162 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:04,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-12-02 16:32:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 167. [2023-12-02 16:32:04,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 151 states have (on average 1.8543046357615893) internal successors, (280), 166 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 280 transitions. [2023-12-02 16:32:04,411 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 280 transitions. Word has length 7 [2023-12-02 16:32:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:04,412 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 280 transitions. [2023-12-02 16:32:04,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 280 transitions. [2023-12-02 16:32:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 16:32:04,413 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:04,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:04,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 16:32:04,414 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:04,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash 907282286, now seen corresponding path program 1 times [2023-12-02 16:32:04,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:04,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942462677] [2023-12-02 16:32:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:04,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:04,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942462677] [2023-12-02 16:32:04,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942462677] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:04,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:04,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:04,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873196180] [2023-12-02 16:32:04,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:04,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:32:04,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:04,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:32:04,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:04,468 INFO L87 Difference]: Start difference. First operand 167 states and 280 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:04,518 INFO L93 Difference]: Finished difference Result 283 states and 443 transitions. [2023-12-02 16:32:04,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:32:04,518 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 16:32:04,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:04,520 INFO L225 Difference]: With dead ends: 283 [2023-12-02 16:32:04,520 INFO L226 Difference]: Without dead ends: 283 [2023-12-02 16:32:04,521 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 16:32:04,522 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 42 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:04,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:04,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-12-02 16:32:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 257. [2023-12-02 16:32:04,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 241 states have (on average 1.7468879668049793) internal successors, (421), 256 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 421 transitions. [2023-12-02 16:32:04,535 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 421 transitions. Word has length 8 [2023-12-02 16:32:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:04,536 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 421 transitions. [2023-12-02 16:32:04,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 421 transitions. [2023-12-02 16:32:04,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 16:32:04,537 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:04,537 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:04,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 16:32:04,537 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:04,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:04,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1613015847, now seen corresponding path program 1 times [2023-12-02 16:32:04,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:04,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289564253] [2023-12-02 16:32:04,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:04,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289564253] [2023-12-02 16:32:04,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289564253] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437530255] [2023-12-02 16:32:04,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:04,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:04,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:04,648 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:04,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 16:32:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:04,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:32:04,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437530255] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [227805877] [2023-12-02 16:32:04,851 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 16:32:04,851 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:04,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:04,859 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:04,860 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:05,981 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:09,125 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2122#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= ~pc1~0 2) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~pc4~0 1) (= ~t1~0.base 0) (= ~res4~0 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (<= 1 ~pc1~0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:32:09,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:09,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:09,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-12-02 16:32:09,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129606882] [2023-12-02 16:32:09,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:09,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:32:09,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:09,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:32:09,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=177, Unknown=1, NotChecked=0, Total=240 [2023-12-02 16:32:09,127 INFO L87 Difference]: Start difference. First operand 257 states and 421 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:09,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:09,199 INFO L93 Difference]: Finished difference Result 387 states and 605 transitions. [2023-12-02 16:32:09,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:32:09,200 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-02 16:32:09,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:09,202 INFO L225 Difference]: With dead ends: 387 [2023-12-02 16:32:09,202 INFO L226 Difference]: Without dead ends: 387 [2023-12-02 16:32:09,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=68, Invalid=203, Unknown=1, NotChecked=0, Total=272 [2023-12-02 16:32:09,203 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 104 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:09,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 219 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:09,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2023-12-02 16:32:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 362. [2023-12-02 16:32:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 346 states have (on average 1.7109826589595376) internal successors, (592), 361 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 592 transitions. [2023-12-02 16:32:09,215 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 592 transitions. Word has length 12 [2023-12-02 16:32:09,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:09,216 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 592 transitions. [2023-12-02 16:32:09,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:09,216 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 592 transitions. [2023-12-02 16:32:09,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 16:32:09,217 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:09,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:09,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:09,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-02 16:32:09,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:09,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:09,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1671251265, now seen corresponding path program 1 times [2023-12-02 16:32:09,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:09,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136518574] [2023-12-02 16:32:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:09,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:09,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:09,485 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136518574] [2023-12-02 16:32:09,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136518574] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:09,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633299180] [2023-12-02 16:32:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:09,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:09,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:09,487 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:09,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 16:32:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:09,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:32:09,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:09,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:09,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633299180] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:09,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968306844] [2023-12-02 16:32:09,610 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-12-02 16:32:09,611 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:09,611 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:09,611 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:09,611 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:09,978 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [968306844] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5] total 13 [2023-12-02 16:32:10,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128546560] [2023-12-02 16:32:10,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:10,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:32:10,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:10,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:32:10,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-12-02 16:32:10,948 INFO L87 Difference]: Start difference. First operand 362 states and 592 transitions. Second operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:11,423 INFO L93 Difference]: Finished difference Result 334 states and 541 transitions. [2023-12-02 16:32:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:32:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 16:32:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:11,426 INFO L225 Difference]: With dead ends: 334 [2023-12-02 16:32:11,426 INFO L226 Difference]: Without dead ends: 334 [2023-12-02 16:32:11,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:32:11,427 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:11,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:32:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-02 16:32:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2023-12-02 16:32:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 317 states have (on average 1.7034700315457414) internal successors, (540), 332 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 540 transitions. [2023-12-02 16:32:11,437 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 540 transitions. Word has length 13 [2023-12-02 16:32:11,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:11,437 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 540 transitions. [2023-12-02 16:32:11,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,437 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 540 transitions. [2023-12-02 16:32:11,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 16:32:11,438 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:11,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:11,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 16:32:11,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:11,640 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:11,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:11,640 INFO L85 PathProgramCache]: Analyzing trace with hash 308611874, now seen corresponding path program 1 times [2023-12-02 16:32:11,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:11,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834374645] [2023-12-02 16:32:11,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:11,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:11,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 16:32:11,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:11,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834374645] [2023-12-02 16:32:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834374645] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:32:11,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:32:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:32:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279510288] [2023-12-02 16:32:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:32:11,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:32:11,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:32:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:11,687 INFO L87 Difference]: Start difference. First operand 333 states and 540 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:11,726 INFO L93 Difference]: Finished difference Result 134 states and 195 transitions. [2023-12-02 16:32:11,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:32:11,727 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 16:32:11,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:11,728 INFO L225 Difference]: With dead ends: 134 [2023-12-02 16:32:11,728 INFO L226 Difference]: Without dead ends: 134 [2023-12-02 16:32:11,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:32:11,729 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:11,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:11,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-12-02 16:32:11,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2023-12-02 16:32:11,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 122 states have (on average 1.598360655737705) internal successors, (195), 133 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 195 transitions. [2023-12-02 16:32:11,733 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 195 transitions. Word has length 15 [2023-12-02 16:32:11,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:11,733 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 195 transitions. [2023-12-02 16:32:11,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:11,734 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 195 transitions. [2023-12-02 16:32:11,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 16:32:11,734 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:11,735 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:11,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 16:32:11,735 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:11,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:11,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1888303086, now seen corresponding path program 1 times [2023-12-02 16:32:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:11,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477911570] [2023-12-02 16:32:11,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:11,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:11,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:11,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477911570] [2023-12-02 16:32:11,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477911570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:11,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002049202] [2023-12-02 16:32:11,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:11,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:11,872 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 16:32:11,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:11,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:32:11,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:11,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:12,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002049202] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:12,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1467298848] [2023-12-02 16:32:12,004 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 16:32:12,004 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:12,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:12,004 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:12,005 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:13,016 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:15,714 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4029#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (<= 1 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= ~pc1~0 2) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~pc4~0 1) (= ~t1~0.base 0) (= ~res4~0 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (<= 1 ~pc1~0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:32:15,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:15,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-02 16:32:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405076669] [2023-12-02 16:32:15,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:32:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:15,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:32:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=189, Unknown=1, NotChecked=0, Total=240 [2023-12-02 16:32:15,716 INFO L87 Difference]: Start difference. First operand 134 states and 195 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:15,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:15,790 INFO L93 Difference]: Finished difference Result 201 states and 282 transitions. [2023-12-02 16:32:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:32:15,791 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 16:32:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:15,792 INFO L225 Difference]: With dead ends: 201 [2023-12-02 16:32:15,792 INFO L226 Difference]: Without dead ends: 201 [2023-12-02 16:32:15,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=62, Invalid=243, Unknown=1, NotChecked=0, Total=306 [2023-12-02 16:32:15,793 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 43 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:15,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 193 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-12-02 16:32:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 179. [2023-12-02 16:32:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 167 states have (on average 1.592814371257485) internal successors, (266), 178 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 266 transitions. [2023-12-02 16:32:15,799 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 266 transitions. Word has length 20 [2023-12-02 16:32:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:15,799 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 266 transitions. [2023-12-02 16:32:15,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 266 transitions. [2023-12-02 16:32:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 16:32:15,800 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:15,800 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:15,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:16,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:16,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:16,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:16,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1705132012, now seen corresponding path program 1 times [2023-12-02 16:32:16,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:16,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267279598] [2023-12-02 16:32:16,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:16,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:16,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:16,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267279598] [2023-12-02 16:32:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267279598] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715426611] [2023-12-02 16:32:16,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:16,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:16,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:16,077 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:16,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 16:32:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:16,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:32:16,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:16,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:16,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715426611] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:16,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [411317348] [2023-12-02 16:32:16,244 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 16:32:16,245 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:16,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:16,245 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:16,245 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:18,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:18,846 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4545#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1| (<= 2 ~pc4~0))' at error location [2023-12-02 16:32:18,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:18,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:18,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-12-02 16:32:18,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270565922] [2023-12-02 16:32:18,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:18,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:32:18,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:18,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:32:18,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=280, Unknown=1, NotChecked=0, Total=342 [2023-12-02 16:32:18,848 INFO L87 Difference]: Start difference. First operand 179 states and 266 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:18,937 INFO L93 Difference]: Finished difference Result 300 states and 419 transitions. [2023-12-02 16:32:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:32:18,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 16:32:18,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:18,939 INFO L225 Difference]: With dead ends: 300 [2023-12-02 16:32:18,939 INFO L226 Difference]: Without dead ends: 300 [2023-12-02 16:32:18,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=348, Unknown=1, NotChecked=0, Total=420 [2023-12-02 16:32:18,940 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 79 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:18,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 205 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-12-02 16:32:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 265. [2023-12-02 16:32:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 253 states have (on average 1.5138339920948616) internal successors, (383), 264 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 383 transitions. [2023-12-02 16:32:18,948 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 383 transitions. Word has length 20 [2023-12-02 16:32:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:18,949 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 383 transitions. [2023-12-02 16:32:18,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:18,949 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 383 transitions. [2023-12-02 16:32:18,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 16:32:18,950 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:18,950 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:18,955 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 16:32:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:19,155 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:19,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1800373799, now seen corresponding path program 2 times [2023-12-02 16:32:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:19,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156981615] [2023-12-02 16:32:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:19,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:32:19,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156981615] [2023-12-02 16:32:19,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156981615] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:19,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321460938] [2023-12-02 16:32:19,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:32:19,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:19,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:19,257 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:19,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 16:32:19,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:32:19,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:32:19,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:32:19,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:32:19,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:32:19,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321460938] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:19,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [213609897] [2023-12-02 16:32:19,381 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 16:32:19,381 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:19,381 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:19,381 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:19,382 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:21,830 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:22,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5276#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1| (<= 2 ~pc4~0))' at error location [2023-12-02 16:32:22,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:22,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:22,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-12-02 16:32:22,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83304512] [2023-12-02 16:32:22,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:32:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:22,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:32:22,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=248, Unknown=1, NotChecked=0, Total=306 [2023-12-02 16:32:22,126 INFO L87 Difference]: Start difference. First operand 265 states and 383 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:22,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:22,190 INFO L93 Difference]: Finished difference Result 380 states and 530 transitions. [2023-12-02 16:32:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:32:22,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 16:32:22,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:22,192 INFO L225 Difference]: With dead ends: 380 [2023-12-02 16:32:22,193 INFO L226 Difference]: Without dead ends: 380 [2023-12-02 16:32:22,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=343, Unknown=1, NotChecked=0, Total=420 [2023-12-02 16:32:22,193 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 37 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:22,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 157 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:22,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-12-02 16:32:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 265. [2023-12-02 16:32:22,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 253 states have (on average 1.5138339920948616) internal successors, (383), 264 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:22,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 383 transitions. [2023-12-02 16:32:22,202 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 383 transitions. Word has length 25 [2023-12-02 16:32:22,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:22,202 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 383 transitions. [2023-12-02 16:32:22,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 383 transitions. [2023-12-02 16:32:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:32:22,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:22,204 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:22,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 16:32:22,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 16:32:22,409 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:22,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:22,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1292019289, now seen corresponding path program 1 times [2023-12-02 16:32:22,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:22,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352016353] [2023-12-02 16:32:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:22,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:22,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:22,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352016353] [2023-12-02 16:32:22,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352016353] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:22,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164431786] [2023-12-02 16:32:22,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:22,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:22,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:22,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:22,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 16:32:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:22,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 16:32:22,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:22,705 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:22,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:22,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164431786] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:22,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [423854201] [2023-12-02 16:32:22,793 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-12-02 16:32:22,793 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:22,794 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:22,794 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:22,794 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:24,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:25,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6098#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1|)' at error location [2023-12-02 16:32:25,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:25,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:25,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 7] total 9 [2023-12-02 16:32:25,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159384980] [2023-12-02 16:32:25,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:25,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:32:25,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:25,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:32:25,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2023-12-02 16:32:25,120 INFO L87 Difference]: Start difference. First operand 265 states and 383 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:25,517 INFO L93 Difference]: Finished difference Result 977 states and 1381 transitions. [2023-12-02 16:32:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 16:32:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:32:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:25,522 INFO L225 Difference]: With dead ends: 977 [2023-12-02 16:32:25,523 INFO L226 Difference]: Without dead ends: 977 [2023-12-02 16:32:25,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=1175, Unknown=1, NotChecked=0, Total=1406 [2023-12-02 16:32:25,524 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 441 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:25,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 251 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:25,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 977 states. [2023-12-02 16:32:25,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 977 to 563. [2023-12-02 16:32:25,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 551 states have (on average 1.5390199637023594) internal successors, (848), 562 states have internal predecessors, (848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 848 transitions. [2023-12-02 16:32:25,542 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 848 transitions. Word has length 26 [2023-12-02 16:32:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:25,543 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 848 transitions. [2023-12-02 16:32:25,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 848 transitions. [2023-12-02 16:32:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-02 16:32:25,544 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:25,544 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:25,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 16:32:25,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 16:32:25,745 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:25,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1925933975, now seen corresponding path program 1 times [2023-12-02 16:32:25,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:25,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018311916] [2023-12-02 16:32:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-12-02 16:32:25,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018311916] [2023-12-02 16:32:25,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018311916] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:25,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207436064] [2023-12-02 16:32:25,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:25,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:25,854 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:25,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 16:32:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:25,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:32:25,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:25,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:26,011 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:32:26,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207436064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036244277] [2023-12-02 16:32:26,014 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 16:32:26,014 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:26,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:26,014 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:26,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:27,031 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:27,562 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7851#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~t1~0.base 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:32:27,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:27,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:27,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-12-02 16:32:27,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515788098] [2023-12-02 16:32:27,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:27,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:32:27,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:27,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:32:27,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=265, Unknown=1, NotChecked=0, Total=306 [2023-12-02 16:32:27,564 INFO L87 Difference]: Start difference. First operand 563 states and 848 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:27,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:27,733 INFO L93 Difference]: Finished difference Result 819 states and 1170 transitions. [2023-12-02 16:32:27,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 16:32:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-12-02 16:32:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:27,738 INFO L225 Difference]: With dead ends: 819 [2023-12-02 16:32:27,738 INFO L226 Difference]: Without dead ends: 819 [2023-12-02 16:32:27,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=514, Unknown=1, NotChecked=0, Total=600 [2023-12-02 16:32:27,739 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 109 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:27,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 341 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:27,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2023-12-02 16:32:27,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 791. [2023-12-02 16:32:27,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 779 states have (on average 1.4813863928112965) internal successors, (1154), 790 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:27,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1154 transitions. [2023-12-02 16:32:27,753 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1154 transitions. Word has length 27 [2023-12-02 16:32:27,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:27,753 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1154 transitions. [2023-12-02 16:32:27,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:27,754 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1154 transitions. [2023-12-02 16:32:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 16:32:27,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:27,754 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:27,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 16:32:27,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 16:32:27,960 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:27,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:27,960 INFO L85 PathProgramCache]: Analyzing trace with hash -7707499, now seen corresponding path program 1 times [2023-12-02 16:32:27,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:27,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162105394] [2023-12-02 16:32:27,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:27,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:32:28,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:28,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162105394] [2023-12-02 16:32:28,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162105394] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:28,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140845919] [2023-12-02 16:32:28,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:28,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:28,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:28,049 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:28,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 16:32:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:28,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:32:28,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:32:28,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:32:28,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140845919] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:28,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1013940258] [2023-12-02 16:32:28,188 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 16:32:28,188 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:28,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:28,188 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:28,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:30,032 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:30,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9661#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1| (<= 2 ~pc4~0))' at error location [2023-12-02 16:32:30,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:30,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:30,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-02 16:32:30,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772088336] [2023-12-02 16:32:30,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:30,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:32:30,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:32:30,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=270, Unknown=1, NotChecked=0, Total=342 [2023-12-02 16:32:30,368 INFO L87 Difference]: Start difference. First operand 791 states and 1154 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:30,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:30,437 INFO L93 Difference]: Finished difference Result 1218 states and 1687 transitions. [2023-12-02 16:32:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:32:30,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-12-02 16:32:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:30,442 INFO L225 Difference]: With dead ends: 1218 [2023-12-02 16:32:30,442 INFO L226 Difference]: Without dead ends: 1218 [2023-12-02 16:32:30,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=375, Unknown=1, NotChecked=0, Total=462 [2023-12-02 16:32:30,443 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 64 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:30,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 251 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:32:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2023-12-02 16:32:30,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1134. [2023-12-02 16:32:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1134 states, 1122 states have (on average 1.427807486631016) internal successors, (1602), 1133 states have internal predecessors, (1602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1134 states to 1134 states and 1602 transitions. [2023-12-02 16:32:30,465 INFO L78 Accepts]: Start accepts. Automaton has 1134 states and 1602 transitions. Word has length 29 [2023-12-02 16:32:30,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:30,465 INFO L495 AbstractCegarLoop]: Abstraction has 1134 states and 1602 transitions. [2023-12-02 16:32:30,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1134 states and 1602 transitions. [2023-12-02 16:32:30,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:32:30,466 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:30,467 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:30,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 16:32:30,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 16:32:30,668 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:30,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash -497332464, now seen corresponding path program 1 times [2023-12-02 16:32:30,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:30,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308642670] [2023-12-02 16:32:30,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:30,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:30,832 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:32:30,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:30,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308642670] [2023-12-02 16:32:30,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308642670] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:30,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274032434] [2023-12-02 16:32:30,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:30,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:30,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:30,834 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:30,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 16:32:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:30,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:32:30,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:32:30,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:31,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-12-02 16:32:31,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274032434] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:31,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716715540] [2023-12-02 16:32:31,011 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-12-02 16:32:31,011 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:31,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:31,012 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:31,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:32,109 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:32,728 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12239#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~t1~0.base 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:32:32,728 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:32,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:32,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-12-02 16:32:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57401094] [2023-12-02 16:32:32,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:32,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:32:32,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:32,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:32:32,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=259, Unknown=1, NotChecked=0, Total=306 [2023-12-02 16:32:32,729 INFO L87 Difference]: Start difference. First operand 1134 states and 1602 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:32,896 INFO L93 Difference]: Finished difference Result 1510 states and 2066 transitions. [2023-12-02 16:32:32,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:32:32,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 16:32:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:32,904 INFO L225 Difference]: With dead ends: 1510 [2023-12-02 16:32:32,904 INFO L226 Difference]: Without dead ends: 1510 [2023-12-02 16:32:32,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=419, Unknown=1, NotChecked=0, Total=506 [2023-12-02 16:32:32,905 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 56 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:32,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 275 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:32,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2023-12-02 16:32:32,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1452. [2023-12-02 16:32:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1452 states, 1440 states have (on average 1.398611111111111) internal successors, (2014), 1451 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:32,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1452 states to 1452 states and 2014 transitions. [2023-12-02 16:32:32,931 INFO L78 Accepts]: Start accepts. Automaton has 1452 states and 2014 transitions. Word has length 34 [2023-12-02 16:32:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:32,932 INFO L495 AbstractCegarLoop]: Abstraction has 1452 states and 2014 transitions. [2023-12-02 16:32:32,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 1452 states and 2014 transitions. [2023-12-02 16:32:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 16:32:32,932 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:32,932 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:32,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 16:32:33,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 16:32:33,133 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:33,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:33,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1866737552, now seen corresponding path program 2 times [2023-12-02 16:32:33,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:33,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336778968] [2023-12-02 16:32:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:33,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:33,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:33,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:33,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:33,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336778968] [2023-12-02 16:32:33,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336778968] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:33,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425970212] [2023-12-02 16:32:33,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 16:32:33,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:33,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:33,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:33,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 16:32:33,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 16:32:33,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 16:32:33,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:32:33,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:32:33,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:32:33,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425970212] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:33,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1482328141] [2023-12-02 16:32:33,415 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 16:32:33,415 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:33,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:33,415 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:33,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:35,375 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:35,732 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15430#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1| (<= 2 ~pc4~0))' at error location [2023-12-02 16:32:35,732 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:35,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2023-12-02 16:32:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777622045] [2023-12-02 16:32:35,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:35,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:32:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:32:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=378, Unknown=1, NotChecked=0, Total=462 [2023-12-02 16:32:35,734 INFO L87 Difference]: Start difference. First operand 1452 states and 2014 transitions. Second operand has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:35,938 INFO L93 Difference]: Finished difference Result 1705 states and 2266 transitions. [2023-12-02 16:32:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:32:35,938 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 16:32:35,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:35,946 INFO L225 Difference]: With dead ends: 1705 [2023-12-02 16:32:35,946 INFO L226 Difference]: Without dead ends: 1705 [2023-12-02 16:32:35,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 79 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=1034, Unknown=1, NotChecked=0, Total=1260 [2023-12-02 16:32:35,947 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 232 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:35,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 355 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2023-12-02 16:32:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1551. [2023-12-02 16:32:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1539 states have (on average 1.3489278752436646) internal successors, (2076), 1550 states have internal predecessors, (2076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:35,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2076 transitions. [2023-12-02 16:32:35,971 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2076 transitions. Word has length 34 [2023-12-02 16:32:35,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:35,971 INFO L495 AbstractCegarLoop]: Abstraction has 1551 states and 2076 transitions. [2023-12-02 16:32:35,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2076 transitions. [2023-12-02 16:32:35,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:32:35,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:35,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:35,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 16:32:36,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 16:32:36,173 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:36,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1760806528, now seen corresponding path program 1 times [2023-12-02 16:32:36,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:36,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869883754] [2023-12-02 16:32:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:36,302 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:32:36,302 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:36,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869883754] [2023-12-02 16:32:36,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869883754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:36,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134357775] [2023-12-02 16:32:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:36,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:36,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:36,308 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:36,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 16:32:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:36,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:32:36,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:36,452 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:32:36,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 36 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-02 16:32:36,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134357775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:36,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2096523412] [2023-12-02 16:32:36,498 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 16:32:36,498 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:36,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:36,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:36,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:38,534 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:38,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18985#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 5) |ULTIMATE.start_pop_#t~switch7#1|)' at error location [2023-12-02 16:32:38,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:38,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-12-02 16:32:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298262938] [2023-12-02 16:32:38,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:38,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:32:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:32:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=326, Unknown=1, NotChecked=0, Total=380 [2023-12-02 16:32:38,781 INFO L87 Difference]: Start difference. First operand 1551 states and 2076 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:38,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:38,985 INFO L93 Difference]: Finished difference Result 2986 states and 3969 transitions. [2023-12-02 16:32:38,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:32:38,986 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 16:32:38,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:38,996 INFO L225 Difference]: With dead ends: 2986 [2023-12-02 16:32:38,996 INFO L226 Difference]: Without dead ends: 2986 [2023-12-02 16:32:38,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=151, Invalid=718, Unknown=1, NotChecked=0, Total=870 [2023-12-02 16:32:38,997 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 221 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:38,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 226 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:32:39,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2986 states. [2023-12-02 16:32:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2986 to 2517. [2023-12-02 16:32:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2505 states have (on average 1.3620758483033932) internal successors, (3412), 2516 states have internal predecessors, (3412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 3412 transitions. [2023-12-02 16:32:39,035 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 3412 transitions. Word has length 42 [2023-12-02 16:32:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:39,036 INFO L495 AbstractCegarLoop]: Abstraction has 2517 states and 3412 transitions. [2023-12-02 16:32:39,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 3412 transitions. [2023-12-02 16:32:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 16:32:39,037 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:39,037 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:39,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 16:32:39,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:39,238 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:39,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:39,238 INFO L85 PathProgramCache]: Analyzing trace with hash -634214508, now seen corresponding path program 1 times [2023-12-02 16:32:39,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:39,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868232159] [2023-12-02 16:32:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:39,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:32:39,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868232159] [2023-12-02 16:32:39,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868232159] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:39,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155122296] [2023-12-02 16:32:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:39,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:39,558 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:39,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 16:32:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:39,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 16:32:39,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:32:39,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:40,400 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 16:32:40,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155122296] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:40,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [294577242] [2023-12-02 16:32:40,402 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 16:32:40,402 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:40,403 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:40,403 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:40,403 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:41,413 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:42,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24794#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~t1~0.base 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:32:42,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:42,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:42,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2023-12-02 16:32:42,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006779929] [2023-12-02 16:32:42,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:42,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 16:32:42,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 16:32:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=887, Unknown=1, NotChecked=0, Total=992 [2023-12-02 16:32:42,072 INFO L87 Difference]: Start difference. First operand 2517 states and 3412 transitions. Second operand has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:43,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:43,651 INFO L93 Difference]: Finished difference Result 6809 states and 9044 transitions. [2023-12-02 16:32:43,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-02 16:32:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 16:32:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:43,679 INFO L225 Difference]: With dead ends: 6809 [2023-12-02 16:32:43,679 INFO L226 Difference]: Without dead ends: 6809 [2023-12-02 16:32:43,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=997, Invalid=5482, Unknown=1, NotChecked=0, Total=6480 [2023-12-02 16:32:43,682 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 886 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 1165 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:43,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 1165 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 16:32:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6809 states. [2023-12-02 16:32:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6809 to 4898. [2023-12-02 16:32:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4886 states have (on average 1.3620548505935326) internal successors, (6655), 4897 states have internal predecessors, (6655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:43,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 6655 transitions. [2023-12-02 16:32:43,789 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 6655 transitions. Word has length 43 [2023-12-02 16:32:43,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:43,789 INFO L495 AbstractCegarLoop]: Abstraction has 4898 states and 6655 transitions. [2023-12-02 16:32:43,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.136363636363637) internal successors, (91), 22 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:43,790 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 6655 transitions. [2023-12-02 16:32:43,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 16:32:43,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:43,791 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:43,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 16:32:43,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:43,992 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:43,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:43,992 INFO L85 PathProgramCache]: Analyzing trace with hash -346824698, now seen corresponding path program 1 times [2023-12-02 16:32:43,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:43,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600317930] [2023-12-02 16:32:43,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:43,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 55 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:32:44,377 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600317930] [2023-12-02 16:32:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600317930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420939777] [2023-12-02 16:32:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:44,379 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:44,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:32:44,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:44,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 16:32:44,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:44,536 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 16:32:44,789 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:44,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420939777] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1011795223] [2023-12-02 16:32:45,281 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 16:32:45,281 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:45,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:45,281 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:45,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:46,949 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:47,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36983#(and (= ~pc4~0 4) (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 3) (exists ((|v_ULTIMATE.start_main_#t~nondet10#1_281| Int) (|v_ULTIMATE.start_main_#t~short11#1_16| Bool) (|v_ULTIMATE.start_main_#t~nondet10#1_282| Int)) (and (or (and (= |v_ULTIMATE.start_main_#t~nondet10#1_282| |v_ULTIMATE.start_main_#t~nondet10#1_281|) |v_ULTIMATE.start_main_#t~short11#1_16|) (and (not (= |v_ULTIMATE.start_main_#t~nondet10#1_282| 0)) (<= |v_ULTIMATE.start_main_#t~nondet10#1_282| 2147483647) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet10#1_282| 2147483648)) (not |v_ULTIMATE.start_main_#t~short11#1_16|))) (or (and (or (not (= ~S~0.offset 0)) (not (= ~pc1~0 1)) (not (= ~S~0.base 0))) |v_ULTIMATE.start_main_#t~short11#1_16|) (and (= ~pc1~0 1) (= ~S~0.base 0) (= ~S~0.offset 0) (not |v_ULTIMATE.start_main_#t~short11#1_16|))))) |ULTIMATE.start_pop_#t~switch7#1|)' at error location [2023-12-02 16:32:47,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:47,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:47,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-12-02 16:32:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047225414] [2023-12-02 16:32:47,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:47,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 16:32:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 16:32:47,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=956, Unknown=1, NotChecked=0, Total=1056 [2023-12-02 16:32:47,666 INFO L87 Difference]: Start difference. First operand 4898 states and 6655 transitions. Second operand has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:49,389 INFO L93 Difference]: Finished difference Result 7848 states and 10582 transitions. [2023-12-02 16:32:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 16:32:49,389 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-02 16:32:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:49,419 INFO L225 Difference]: With dead ends: 7848 [2023-12-02 16:32:49,419 INFO L226 Difference]: Without dead ends: 7848 [2023-12-02 16:32:49,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=670, Invalid=3751, Unknown=1, NotChecked=0, Total=4422 [2023-12-02 16:32:49,421 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 453 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:49,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 990 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 16:32:49,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7848 states. [2023-12-02 16:32:49,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7848 to 7643. [2023-12-02 16:32:49,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7643 states, 7632 states have (on average 1.3651729559748427) internal successors, (10419), 7642 states have internal predecessors, (10419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:49,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7643 states to 7643 states and 10419 transitions. [2023-12-02 16:32:49,526 INFO L78 Accepts]: Start accepts. Automaton has 7643 states and 10419 transitions. Word has length 57 [2023-12-02 16:32:49,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:49,526 INFO L495 AbstractCegarLoop]: Abstraction has 7643 states and 10419 transitions. [2023-12-02 16:32:49,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.823529411764706) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:49,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7643 states and 10419 transitions. [2023-12-02 16:32:49,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-12-02 16:32:49,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:49,528 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:49,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:32:49,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:49,728 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:49,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:49,729 INFO L85 PathProgramCache]: Analyzing trace with hash -346824697, now seen corresponding path program 1 times [2023-12-02 16:32:49,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:49,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339859570] [2023-12-02 16:32:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:49,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 55 proven. 52 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 16:32:50,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339859570] [2023-12-02 16:32:50,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339859570] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:50,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724000135] [2023-12-02 16:32:50,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:50,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:50,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:50,124 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:50,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 16:32:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:50,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 16:32:50,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 47 proven. 62 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:50,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:51,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-12-02 16:32:51,462 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 16:32:51,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724000135] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:51,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [499203529] [2023-12-02 16:32:51,463 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2023-12-02 16:32:51,463 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:51,464 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:51,464 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:51,464 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:32:53,106 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:32:54,056 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52943#(and (= ~pc4~0 4) (or (< (+ ~t4~0.offset 4) 0) (< (select |#length| ~t4~0.base) (+ ~t4~0.offset 8))) (= |ULTIMATE.start_pop_#t~post6#1| 3) |ULTIMATE.start_pop_#t~switch7#1| (exists ((|v_ULTIMATE.start_main_#t~nondet10#1_317| Int) (|v_ULTIMATE.start_main_#t~short11#1_16| Bool) (|v_ULTIMATE.start_main_#t~nondet10#1_316| Int)) (and (or (and (not (= |v_ULTIMATE.start_main_#t~nondet10#1_317| 0)) (<= 0 (+ |v_ULTIMATE.start_main_#t~nondet10#1_317| 2147483648)) (<= |v_ULTIMATE.start_main_#t~nondet10#1_317| 2147483647) (not |v_ULTIMATE.start_main_#t~short11#1_16|)) (and |v_ULTIMATE.start_main_#t~short11#1_16| (= |v_ULTIMATE.start_main_#t~nondet10#1_317| |v_ULTIMATE.start_main_#t~nondet10#1_316|))) (or (and (or (not (= ~S~0.offset 0)) (not (= ~pc1~0 1)) (not (= ~S~0.base 0))) |v_ULTIMATE.start_main_#t~short11#1_16|) (and (= ~pc1~0 1) (= ~S~0.base 0) (= ~S~0.offset 0) (not |v_ULTIMATE.start_main_#t~short11#1_16|))))))' at error location [2023-12-02 16:32:54,056 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:32:54,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:32:54,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-12-02 16:32:54,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439340355] [2023-12-02 16:32:54,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:32:54,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 16:32:54,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:32:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 16:32:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1622, Unknown=1, NotChecked=0, Total=1806 [2023-12-02 16:32:54,059 INFO L87 Difference]: Start difference. First operand 7643 states and 10419 transitions. Second operand has 28 states, 27 states have (on average 5.074074074074074) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:32:57,547 INFO L93 Difference]: Finished difference Result 10289 states and 13926 transitions. [2023-12-02 16:32:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-12-02 16:32:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 5.074074074074074) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-12-02 16:32:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:32:57,561 INFO L225 Difference]: With dead ends: 10289 [2023-12-02 16:32:57,561 INFO L226 Difference]: Without dead ends: 10289 [2023-12-02 16:32:57,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1602, Invalid=7903, Unknown=1, NotChecked=0, Total=9506 [2023-12-02 16:32:57,564 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 614 mSDsluCounter, 1408 mSDsCounter, 0 mSdLazyCounter, 2096 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 2138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:32:57,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [614 Valid, 1520 Invalid, 2138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2096 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 16:32:57,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10289 states. [2023-12-02 16:32:57,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10289 to 9762. [2023-12-02 16:32:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9762 states, 9751 states have (on average 1.372372064403651) internal successors, (13382), 9761 states have internal predecessors, (13382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 13382 transitions. [2023-12-02 16:32:57,679 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 13382 transitions. Word has length 57 [2023-12-02 16:32:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:32:57,679 INFO L495 AbstractCegarLoop]: Abstraction has 9762 states and 13382 transitions. [2023-12-02 16:32:57,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 5.074074074074074) internal successors, (137), 28 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:32:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 13382 transitions. [2023-12-02 16:32:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 16:32:57,680 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:32:57,680 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:32:57,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 16:32:57,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:57,881 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:32:57,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:32:57,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1867285675, now seen corresponding path program 1 times [2023-12-02 16:32:57,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:32:57,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574946518] [2023-12-02 16:32:57,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:57,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:32:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:32:58,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:32:58,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574946518] [2023-12-02 16:32:58,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574946518] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:32:58,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834168387] [2023-12-02 16:32:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:32:58,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:32:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:32:58,020 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:32:58,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 16:32:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:32:58,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:32:58,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:32:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:32:58,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:32:58,194 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 91 proven. 1 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:32:58,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834168387] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:32:58,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1334077817] [2023-12-02 16:32:58,195 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-12-02 16:32:58,195 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:32:58,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:32:58,196 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:32:58,196 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:33:00,219 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:33:00,458 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73511#(and (not (= (select |#valid| ~t4~0.base) 1)) (= |ULTIMATE.start_pop_#t~post6#1| 5) |ULTIMATE.start_pop_#t~switch7#1|)' at error location [2023-12-02 16:33:00,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:33:00,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:33:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-12-02 16:33:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353635949] [2023-12-02 16:33:00,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:00,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:33:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:33:00,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:33:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=230, Unknown=1, NotChecked=0, Total=272 [2023-12-02 16:33:00,460 INFO L87 Difference]: Start difference. First operand 9762 states and 13382 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:00,557 INFO L93 Difference]: Finished difference Result 7303 states and 10063 transitions. [2023-12-02 16:33:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 16:33:00,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 16:33:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:00,566 INFO L225 Difference]: With dead ends: 7303 [2023-12-02 16:33:00,566 INFO L226 Difference]: Without dead ends: 7303 [2023-12-02 16:33:00,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=351, Unknown=1, NotChecked=0, Total=420 [2023-12-02 16:33:00,567 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 67 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:00,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 256 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:33:00,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7303 states. [2023-12-02 16:33:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7303 to 7111. [2023-12-02 16:33:00,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7111 states, 7100 states have (on average 1.390281690140845) internal successors, (9871), 7110 states have internal predecessors, (9871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:00,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7111 states to 7111 states and 9871 transitions. [2023-12-02 16:33:00,641 INFO L78 Accepts]: Start accepts. Automaton has 7111 states and 9871 transitions. Word has length 59 [2023-12-02 16:33:00,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:00,641 INFO L495 AbstractCegarLoop]: Abstraction has 7111 states and 9871 transitions. [2023-12-02 16:33:00,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:00,642 INFO L276 IsEmpty]: Start isEmpty. Operand 7111 states and 9871 transitions. [2023-12-02 16:33:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-02 16:33:00,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:00,644 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:00,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 16:33:00,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-12-02 16:33:00,845 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:00,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:00,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1394364564, now seen corresponding path program 1 times [2023-12-02 16:33:00,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:33:00,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427085790] [2023-12-02 16:33:00,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:00,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:33:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 126 proven. 84 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:33:01,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 16:33:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427085790] [2023-12-02 16:33:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427085790] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 16:33:01,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555651802] [2023-12-02 16:33:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:01,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:01,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:01,587 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:01,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 16:33:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:01,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 16:33:01,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 56 proven. 57 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2023-12-02 16:33:01,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 67 proven. 52 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-12-02 16:33:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555651802] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1186519204] [2023-12-02 16:33:02,044 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2023-12-02 16:33:02,044 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 16:33:02,045 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 16:33:02,045 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 16:33:02,045 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 16:33:03,567 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 16:33:04,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88424#(and (= ~x4~0.offset 0) (= ~x4~0.base 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= ~S~0.base 0) (= ~x1~0.offset 0) (= ~t1~0.base 0) (= ~S~0.offset 0) (= ~garbage~0.offset 0) (= ~x1~0.base 0) (= ~t1~0.offset 0) (= 0 ~garbage~0.base) (= ~t4~0.base 0) (= |ULTIMATE.start_main_#res#1| 0) (= ~t4~0.offset 0))' at error location [2023-12-02 16:33:04,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 16:33:04,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 16:33:04,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-12-02 16:33:04,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956585911] [2023-12-02 16:33:04,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:04,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 16:33:04,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 16:33:04,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 16:33:04,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1888, Unknown=1, NotChecked=0, Total=2070 [2023-12-02 16:33:04,452 INFO L87 Difference]: Start difference. First operand 7111 states and 9871 transitions. Second operand has 31 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:26,870 INFO L93 Difference]: Finished difference Result 14108 states and 18619 transitions. [2023-12-02 16:33:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2023-12-02 16:33:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-12-02 16:33:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:26,884 INFO L225 Difference]: With dead ends: 14108 [2023-12-02 16:33:26,884 INFO L226 Difference]: Without dead ends: 14108 [2023-12-02 16:33:26,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 640 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185273 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=28533, Invalid=382988, Unknown=1, NotChecked=0, Total=411522 [2023-12-02 16:33:26,913 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 2176 mSDsluCounter, 3633 mSDsCounter, 0 mSdLazyCounter, 6100 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 3880 SdHoareTripleChecker+Invalid, 6383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 6100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:26,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2176 Valid, 3880 Invalid, 6383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 6100 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-02 16:33:26,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14108 states. [2023-12-02 16:33:27,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14108 to 11689. [2023-12-02 16:33:27,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11689 states, 11678 states have (on average 1.3397842096249357) internal successors, (15646), 11688 states have internal predecessors, (15646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:27,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11689 states to 11689 states and 15646 transitions. [2023-12-02 16:33:27,050 INFO L78 Accepts]: Start accepts. Automaton has 11689 states and 15646 transitions. Word has length 76 [2023-12-02 16:33:27,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:27,050 INFO L495 AbstractCegarLoop]: Abstraction has 11689 states and 15646 transitions. [2023-12-02 16:33:27,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.419354838709677) internal successors, (137), 31 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:27,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11689 states and 15646 transitions. [2023-12-02 16:33:27,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 16:33:27,052 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:27,052 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 6, 6, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:27,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 16:33:27,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-12-02 16:33:27,253 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:27,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:27,253 INFO L85 PathProgramCache]: Analyzing trace with hash 478807910, now seen corresponding path program 1 times [2023-12-02 16:33:27,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 16:33:27,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215034812] [2023-12-02 16:33:27,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:27,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 16:33:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:33:27,285 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:33:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:33:27,347 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 16:33:27,347 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:33:27,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2023-12-02 16:33:27,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-12-02 16:33:27,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-12-02 16:33:27,350 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-12-02 16:33:27,351 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-12-02 16:33:27,352 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-12-02 16:33:27,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2023-12-02 16:33:27,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2023-12-02 16:33:27,353 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2023-12-02 16:33:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-12-02 16:33:27,356 INFO L445 BasicCegarLoop]: Path program 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 16:33:27,360 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:33:27,403 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,403 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,404 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,404 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,404 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,405 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,405 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,405 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,406 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,406 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,406 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,406 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,407 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,407 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,407 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,407 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,408 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,408 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,408 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,409 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,409 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,409 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,409 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,410 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,410 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,410 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,410 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,411 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,411 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:33:27,411 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:33:27,411 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,412 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,412 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:33:27,412 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:33:27,413 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,413 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,413 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:33:27,413 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:33:27,414 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,414 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,414 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:33:27,415 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:33:27,415 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,415 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,416 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:33:27,416 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:33:27,416 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:33:27,416 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:33:27,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:33:27 BoogieIcfgContainer [2023-12-02 16:33:27,429 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:33:27,429 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:33:27,429 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:33:27,430 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:33:27,430 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:32:03" (3/4) ... [2023-12-02 16:33:27,432 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 16:33:27,433 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:33:27,434 INFO L158 Benchmark]: Toolchain (without parser) took 85254.43ms. Allocated memory was 169.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 137.7MB in the beginning and 835.8MB in the end (delta: -698.2MB). Peak memory consumption was 437.9MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,434 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 99.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:33:27,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 371.69ms. Allocated memory is still 169.9MB. Free memory was 137.7MB in the beginning and 119.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,435 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.85ms. Allocated memory is still 169.9MB. Free memory was 119.9MB in the beginning and 117.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,435 INFO L158 Benchmark]: Boogie Preprocessor took 32.90ms. Allocated memory is still 169.9MB. Free memory was 117.8MB in the beginning and 116.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,435 INFO L158 Benchmark]: RCFGBuilder took 512.74ms. Allocated memory is still 169.9MB. Free memory was 116.2MB in the beginning and 92.1MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,436 INFO L158 Benchmark]: TraceAbstraction took 84279.79ms. Allocated memory was 169.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 91.5MB in the beginning and 836.9MB in the end (delta: -745.4MB). Peak memory consumption was 389.7MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,436 INFO L158 Benchmark]: Witness Printer took 4.10ms. Allocated memory is still 1.3GB. Free memory was 836.9MB in the beginning and 835.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 16:33:27,437 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 125.8MB. Free memory is still 99.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 371.69ms. Allocated memory is still 169.9MB. Free memory was 137.7MB in the beginning and 119.9MB in the end (delta: 17.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.85ms. Allocated memory is still 169.9MB. Free memory was 119.9MB in the beginning and 117.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.90ms. Allocated memory is still 169.9MB. Free memory was 117.8MB in the beginning and 116.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 512.74ms. Allocated memory is still 169.9MB. Free memory was 116.2MB in the beginning and 92.1MB in the end (delta: 24.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 84279.79ms. Allocated memory was 169.9MB in the beginning and 1.3GB in the end (delta: 1.1GB). Free memory was 91.5MB in the beginning and 836.9MB in the end (delta: -745.4MB). Peak memory consumption was 389.7MB. Max. memory is 16.1GB. * Witness Printer took 4.10ms. Allocated memory is still 1.3GB. Free memory was 836.9MB in the beginning and 835.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L542] x1->data = 4 VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [S={0:0}, garbage={0:0}, pc1=4, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=4, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L548] x1->next = t1 VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L552] S = x1 VAL [S={-2:0}, garbage={0:0}, pc1=6, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={-2:0}, garbage={0:0}, pc1=6, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=2, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=2, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=3, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=3, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=4, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L576] EXPR t4->next [L576] x4 = t4->next [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={-2:0}, garbage={0:0}, pc1=1, pc4=4, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: [L580] S = x4 VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={-2:0}, x1={-2:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [S={0:0}, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 49 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 84.2s, OverallIterations: 25, TraceHistogramMax: 11, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 32.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5862 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5862 mSDsluCounter, 11160 SdHoareTripleChecker+Invalid, 6.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9601 mSDsCounter, 585 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12596 IncrementalHoareTripleChecker+Invalid, 13181 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 585 mSolverCounterUnsat, 1559 mSDtfsCounter, 12596 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2888 GetRequests, 1706 SyntacticMatches, 26 SemanticMatches, 1156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191998 ImplicationChecksByTransitivity, 37.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11689occurred in iteration=24, InterpolantAutomatonStates: 938, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 24 MinimizatonAttempts, 6784 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.2s InterpolantComputationTime, 1282 NumberOfCodeBlocks, 1253 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1722 ConstructedInterpolants, 3 QuantifiedInterpolants, 8987 SizeOfPredicates, 106 NumberOfNonLiveVariables, 2963 ConjunctsInSsa, 205 ConjunctsInUnsatCore, 56 InterpolantComputations, 8 PerfectInterpolantSequences, 1928/2819 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 0.4s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 10, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME: 0.3s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 0.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.0s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 33, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 10, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.2s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.2s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 96, DAG_COMPRESSION_RETAINED_NODES: 33, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 16:33:27,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/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_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/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 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 16:33:29,388 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 16:33:29,472 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 16:33:29,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 16:33:29,478 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 16:33:29,505 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 16:33:29,506 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 16:33:29,506 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 16:33:29,507 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 16:33:29,508 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 16:33:29,508 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 16:33:29,509 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 16:33:29,509 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 16:33:29,510 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 16:33:29,511 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 16:33:29,511 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 16:33:29,512 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 16:33:29,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 16:33:29,513 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 16:33:29,514 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 16:33:29,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 16:33:29,515 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 16:33:29,515 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 16:33:29,515 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 16:33:29,516 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 16:33:29,516 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 16:33:29,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 16:33:29,517 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 16:33:29,517 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 16:33:29,518 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 16:33:29,518 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 16:33:29,519 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 16:33:29,519 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 16:33:29,519 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 16:33:29,520 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 16:33:29,520 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 16:33:29,520 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 16:33:29,520 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:33:29,521 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 16:33:29,521 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 16:33:29,521 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 16:33:29,521 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:29,522 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 16:33:29,522 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 16:33:29,522 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 16:33:29,522 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_789465ab-f01c-4d52-8f5c-105e819f31be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1db117ae3c729419255b5da4a7f4ecd64b2d99a167d11f22266a773c4ff13cdb [2023-12-02 16:33:29,809 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 16:33:29,827 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 16:33:29,830 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 16:33:29,831 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 16:33:29,832 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 16:33:29,833 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/memsafety/lockfree-3.3.i [2023-12-02 16:33:32,627 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 16:33:32,875 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 16:33:32,876 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/sv-benchmarks/c/memsafety/lockfree-3.3.i [2023-12-02 16:33:32,891 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/f359a5d4a/4b843bb551cc4ee6a48430b94a2e240f/FLAG80a4bfe7f [2023-12-02 16:33:32,905 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/data/f359a5d4a/4b843bb551cc4ee6a48430b94a2e240f [2023-12-02 16:33:32,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 16:33:32,908 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 16:33:32,910 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 16:33:32,911 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 16:33:32,916 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 16:33:32,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:33:32" (1/1) ... [2023-12-02 16:33:32,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d03153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:32, skipping insertion in model container [2023-12-02 16:33:32,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 04:33:32" (1/1) ... [2023-12-02 16:33:32,971 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 16:33:33,272 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:33:33,288 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 16:33:33,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 16:33:33,371 INFO L206 MainTranslator]: Completed translation [2023-12-02 16:33:33,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33 WrapperNode [2023-12-02 16:33:33,372 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 16:33:33,373 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 16:33:33,373 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 16:33:33,373 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 16:33:33,381 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,443 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,471 INFO L138 Inliner]: procedures = 128, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 126 [2023-12-02 16:33:33,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 16:33:33,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 16:33:33,473 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 16:33:33,473 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 16:33:33,480 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,481 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,486 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,486 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,501 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,503 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,506 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 16:33:33,507 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 16:33:33,508 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 16:33:33,508 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 16:33:33,509 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (1/1) ... [2023-12-02 16:33:33,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 16:33:33,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:33,533 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 16:33:33,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 16:33:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 16:33:33,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 16:33:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 16:33:33,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 16:33:33,692 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 16:33:33,694 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 16:33:34,030 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 16:33:34,065 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 16:33:34,065 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 16:33:34,066 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:33:34 BoogieIcfgContainer [2023-12-02 16:33:34,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 16:33:34,069 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 16:33:34,069 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 16:33:34,072 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 16:33:34,072 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 04:33:32" (1/3) ... [2023-12-02 16:33:34,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e8cf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:33:34, skipping insertion in model container [2023-12-02 16:33:34,073 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 04:33:33" (2/3) ... [2023-12-02 16:33:34,073 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8e8cf42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 04:33:34, skipping insertion in model container [2023-12-02 16:33:34,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:33:34" (3/3) ... [2023-12-02 16:33:34,075 INFO L112 eAbstractionObserver]: Analyzing ICFG lockfree-3.3.i [2023-12-02 16:33:34,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 16:33:34,095 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-12-02 16:33:34,141 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 16:33:34,148 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;@23b13c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 16:33:34,149 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-12-02 16:33:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 56 states, 35 states have (on average 2.142857142857143) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 16:33:34,159 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:34,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 16:33:34,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:34,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:34,167 INFO L85 PathProgramCache]: Analyzing trace with hash 5969409, now seen corresponding path program 1 times [2023-12-02 16:33:34,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:34,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1478052405] [2023-12-02 16:33:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:34,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:34,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:34,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:34,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-02 16:33:34,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:34,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 16:33:34,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:34,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:34,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:34,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1478052405] [2023-12-02 16:33:34,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1478052405] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:34,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:34,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:33:34,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91310993] [2023-12-02 16:33:34,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 16:33:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:34,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 16:33:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:33:34,352 INFO L87 Difference]: Start difference. First operand has 56 states, 35 states have (on average 2.142857142857143) internal successors, (75), 55 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:34,397 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2023-12-02 16:33:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 16:33:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 16:33:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:34,410 INFO L225 Difference]: With dead ends: 56 [2023-12-02 16:33:34,410 INFO L226 Difference]: Without dead ends: 55 [2023-12-02 16:33:34,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 16:33:34,415 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:34,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:33:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-02 16:33:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-02 16:33:34,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 2.057142857142857) internal successors, (72), 54 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 72 transitions. [2023-12-02 16:33:34,453 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 72 transitions. Word has length 4 [2023-12-02 16:33:34,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:34,453 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 72 transitions. [2023-12-02 16:33:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 72 transitions. [2023-12-02 16:33:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 16:33:34,454 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:34,454 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 16:33:34,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:34,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:34,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:34,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:34,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1323128715, now seen corresponding path program 1 times [2023-12-02 16:33:34,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:34,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1928918861] [2023-12-02 16:33:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:34,657 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:34,659 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:34,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-02 16:33:34,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:34,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:34,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:34,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:34,770 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:34,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1928918861] [2023-12-02 16:33:34,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1928918861] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:34,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:34,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:33:34,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031519747] [2023-12-02 16:33:34,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:34,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:33:34,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:33:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:33:34,774 INFO L87 Difference]: Start difference. First operand 55 states and 72 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:34,913 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2023-12-02 16:33:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:33:34,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 16:33:34,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:34,916 INFO L225 Difference]: With dead ends: 89 [2023-12-02 16:33:34,917 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 16:33:34,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 16:33:34,919 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 40 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:34,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 170 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 16:33:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2023-12-02 16:33:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 2.04) internal successors, (102), 69 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 102 transitions. [2023-12-02 16:33:34,932 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 102 transitions. Word has length 6 [2023-12-02 16:33:34,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:34,933 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 102 transitions. [2023-12-02 16:33:34,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 102 transitions. [2023-12-02 16:33:34,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 16:33:34,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:34,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 16:33:34,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-12-02 16:33:35,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:35,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:35,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1323188297, now seen corresponding path program 1 times [2023-12-02 16:33:35,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:35,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622104238] [2023-12-02 16:33:35,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:35,138 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:35,139 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:35,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-02 16:33:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:35,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:33:35,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:35,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:35,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:35,225 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:35,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622104238] [2023-12-02 16:33:35,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622104238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:35,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:35,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:33:35,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460270670] [2023-12-02 16:33:35,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:35,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:33:35,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:35,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:33:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:35,229 INFO L87 Difference]: Start difference. First operand 70 states and 102 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:35,300 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2023-12-02 16:33:35,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:33:35,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 16:33:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:35,302 INFO L225 Difference]: With dead ends: 127 [2023-12-02 16:33:35,303 INFO L226 Difference]: Without dead ends: 127 [2023-12-02 16:33:35,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:35,304 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:35,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 116 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:35,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-12-02 16:33:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2023-12-02 16:33:35,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 108 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 179 transitions. [2023-12-02 16:33:35,319 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 179 transitions. Word has length 6 [2023-12-02 16:33:35,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:35,319 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 179 transitions. [2023-12-02 16:33:35,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,320 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 179 transitions. [2023-12-02 16:33:35,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:33:35,320 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:35,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:35,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 16:33:35,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,521 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:35,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:35,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1930837147, now seen corresponding path program 1 times [2023-12-02 16:33:35,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:35,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698334572] [2023-12-02 16:33:35,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:35,523 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:35,524 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:35,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-12-02 16:33:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:35,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:33:35,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:35,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:35,585 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:35,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698334572] [2023-12-02 16:33:35,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698334572] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:35,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:35,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 16:33:35,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195776678] [2023-12-02 16:33:35,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:35,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:33:35,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:35,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:33:35,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:35,588 INFO L87 Difference]: Start difference. First operand 109 states and 179 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:35,716 INFO L93 Difference]: Finished difference Result 180 states and 290 transitions. [2023-12-02 16:33:35,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:33:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:33:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:35,719 INFO L225 Difference]: With dead ends: 180 [2023-12-02 16:33:35,719 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 16:33:35,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:35,721 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 57 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:35,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 103 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 16:33:35,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 158. [2023-12-02 16:33:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 138 states have (on average 2.0) internal successors, (276), 157 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 276 transitions. [2023-12-02 16:33:35,737 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 276 transitions. Word has length 7 [2023-12-02 16:33:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:35,737 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 276 transitions. [2023-12-02 16:33:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 276 transitions. [2023-12-02 16:33:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:33:35,738 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:35,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:35,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-12-02 16:33:35,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:35,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:35,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1930894162, now seen corresponding path program 1 times [2023-12-02 16:33:35,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:35,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466598566] [2023-12-02 16:33:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:35,942 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:35,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-12-02 16:33:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:35,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 16:33:35,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:36,014 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 7 [2023-12-02 16:33:36,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:36,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:36,023 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:36,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466598566] [2023-12-02 16:33:36,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466598566] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:36,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:36,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:33:36,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132455408] [2023-12-02 16:33:36,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:36,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:33:36,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:33:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:36,026 INFO L87 Difference]: Start difference. First operand 158 states and 276 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:36,186 INFO L93 Difference]: Finished difference Result 224 states and 374 transitions. [2023-12-02 16:33:36,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:33:36,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:33:36,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:36,188 INFO L225 Difference]: With dead ends: 224 [2023-12-02 16:33:36,188 INFO L226 Difference]: Without dead ends: 224 [2023-12-02 16:33:36,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:36,190 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 61 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:36,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:33:36,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2023-12-02 16:33:36,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 204. [2023-12-02 16:33:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 186 states have (on average 1.9408602150537635) internal successors, (361), 203 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 361 transitions. [2023-12-02 16:33:36,206 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 361 transitions. Word has length 7 [2023-12-02 16:33:36,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:36,207 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 361 transitions. [2023-12-02 16:33:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 361 transitions. [2023-12-02 16:33:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 16:33:36,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:36,208 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:36,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2023-12-02 16:33:36,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:36,410 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:36,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:36,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1930894161, now seen corresponding path program 1 times [2023-12-02 16:33:36,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:36,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [579623083] [2023-12-02 16:33:36,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:36,411 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:36,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:36,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:36,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-12-02 16:33:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:36,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:36,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:36,463 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 16:33:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:36,486 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:36,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:36,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [579623083] [2023-12-02 16:33:36,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [579623083] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:36,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:36,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 16:33:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786053244] [2023-12-02 16:33:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:36,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:33:36,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:36,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:33:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:36,489 INFO L87 Difference]: Start difference. First operand 204 states and 361 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:36,668 INFO L93 Difference]: Finished difference Result 219 states and 365 transitions. [2023-12-02 16:33:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:33:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 16:33:36,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:36,670 INFO L225 Difference]: With dead ends: 219 [2023-12-02 16:33:36,670 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 16:33:36,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 16:33:36,672 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 60 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:36,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 148 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:33:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 16:33:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 202. [2023-12-02 16:33:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 186 states have (on average 1.8978494623655915) internal successors, (353), 201 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 353 transitions. [2023-12-02 16:33:36,686 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 353 transitions. Word has length 7 [2023-12-02 16:33:36,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:36,687 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 353 transitions. [2023-12-02 16:33:36,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 353 transitions. [2023-12-02 16:33:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 16:33:36,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:36,688 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:36,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2023-12-02 16:33:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:36,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:36,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash 271831126, now seen corresponding path program 1 times [2023-12-02 16:33:36,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:36,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [423684776] [2023-12-02 16:33:36,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:36,890 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:36,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:36,891 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:36,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-12-02 16:33:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:36,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:36,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:36,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:36,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:36,951 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [423684776] [2023-12-02 16:33:36,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [423684776] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:36,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:36,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:33:36,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530990845] [2023-12-02 16:33:36,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:36,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:33:36,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:33:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:33:36,954 INFO L87 Difference]: Start difference. First operand 202 states and 353 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:37,049 INFO L93 Difference]: Finished difference Result 186 states and 296 transitions. [2023-12-02 16:33:37,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:33:37,050 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 16:33:37,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:37,051 INFO L225 Difference]: With dead ends: 186 [2023-12-02 16:33:37,052 INFO L226 Difference]: Without dead ends: 186 [2023-12-02 16:33:37,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 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 16:33:37,053 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:37,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 154 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:37,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-12-02 16:33:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 162. [2023-12-02 16:33:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.8533333333333333) internal successors, (278), 161 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 278 transitions. [2023-12-02 16:33:37,061 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 278 transitions. Word has length 8 [2023-12-02 16:33:37,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:37,061 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 278 transitions. [2023-12-02 16:33:37,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 278 transitions. [2023-12-02 16:33:37,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 16:33:37,062 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:37,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:37,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-12-02 16:33:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:37,263 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:37,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:37,264 INFO L85 PathProgramCache]: Analyzing trace with hash -111813905, now seen corresponding path program 1 times [2023-12-02 16:33:37,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:37,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [180780981] [2023-12-02 16:33:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:37,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:37,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:37,265 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:37,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-12-02 16:33:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:37,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:37,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:37,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:37,314 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:37,314 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:37,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [180780981] [2023-12-02 16:33:37,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [180780981] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:37,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 16:33:37,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 16:33:37,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236056406] [2023-12-02 16:33:37,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:37,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:33:37,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:37,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:33:37,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:33:37,316 INFO L87 Difference]: Start difference. First operand 162 states and 278 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:37,374 INFO L93 Difference]: Finished difference Result 261 states and 411 transitions. [2023-12-02 16:33:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 16:33:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 16:33:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:37,376 INFO L225 Difference]: With dead ends: 261 [2023-12-02 16:33:37,376 INFO L226 Difference]: Without dead ends: 261 [2023-12-02 16:33:37,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 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 16:33:37,377 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 50 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:37,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 145 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:33:37,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-12-02 16:33:37,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 238. [2023-12-02 16:33:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 226 states have (on average 1.7168141592920354) internal successors, (388), 237 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 388 transitions. [2023-12-02 16:33:37,386 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 388 transitions. Word has length 9 [2023-12-02 16:33:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:37,386 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 388 transitions. [2023-12-02 16:33:37,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 388 transitions. [2023-12-02 16:33:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 16:33:37,387 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:37,388 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:37,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:37,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:37,592 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:37,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:37,592 INFO L85 PathProgramCache]: Analyzing trace with hash -925635527, now seen corresponding path program 1 times [2023-12-02 16:33:37,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:37,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1551351739] [2023-12-02 16:33:37,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:37,593 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:37,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:37,594 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:37,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 16:33:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:37,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:37,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:37,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:37,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1551351739] [2023-12-02 16:33:37,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1551351739] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:37,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [908028088] [2023-12-02 16:33:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:37,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:37,750 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:37,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2023-12-02 16:33:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:37,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 16:33:37,851 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 16:33:37,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 16:33:37,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [908028088] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 16:33:37,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 16:33:37,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-12-02 16:33:37,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945776843] [2023-12-02 16:33:37,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:37,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 16:33:37,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:37,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 16:33:37,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:33:37,863 INFO L87 Difference]: Start difference. First operand 238 states and 388 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:37,904 INFO L93 Difference]: Finished difference Result 250 states and 400 transitions. [2023-12-02 16:33:37,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 16:33:37,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 16:33:37,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:37,906 INFO L225 Difference]: With dead ends: 250 [2023-12-02 16:33:37,907 INFO L226 Difference]: Without dead ends: 250 [2023-12-02 16:33:37,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:33:37,908 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:37,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 109 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 16:33:37,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-12-02 16:33:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2023-12-02 16:33:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 236 states have (on average 1.6864406779661016) internal successors, (398), 247 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 398 transitions. [2023-12-02 16:33:37,917 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 398 transitions. Word has length 15 [2023-12-02 16:33:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:37,918 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 398 transitions. [2023-12-02 16:33:37,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 398 transitions. [2023-12-02 16:33:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 16:33:37,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:37,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:37,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2023-12-02 16:33:38,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2023-12-02 16:33:38,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:38,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:38,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:38,323 INFO L85 PathProgramCache]: Analyzing trace with hash -923788485, now seen corresponding path program 1 times [2023-12-02 16:33:38,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:38,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375696484] [2023-12-02 16:33:38,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:38,323 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:38,324 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:38,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 16:33:38,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:38,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:38,381 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:38,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:38,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375696484] [2023-12-02 16:33:38,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375696484] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:38,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [857199132] [2023-12-02 16:33:38,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:38,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:38,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:38,452 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:38,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 16:33:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:38,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:38,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:38,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [857199132] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:38,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610091561] [2023-12-02 16:33:38,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:38,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:38,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:38,620 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:38,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 16:33:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:38,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:38,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:38,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610091561] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:38,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:38,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2023-12-02 16:33:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661199474] [2023-12-02 16:33:38,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:33:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:38,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:33:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 16:33:38,751 INFO L87 Difference]: Start difference. First operand 248 states and 398 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:38,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:38,990 INFO L93 Difference]: Finished difference Result 516 states and 776 transitions. [2023-12-02 16:33:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 16:33:38,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 16:33:38,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:38,994 INFO L225 Difference]: With dead ends: 516 [2023-12-02 16:33:38,995 INFO L226 Difference]: Without dead ends: 516 [2023-12-02 16:33:38,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:33:38,996 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 238 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:38,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 366 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:33:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2023-12-02 16:33:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 476. [2023-12-02 16:33:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 464 states have (on average 1.6379310344827587) internal successors, (760), 475 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:39,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 760 transitions. [2023-12-02 16:33:39,011 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 760 transitions. Word has length 15 [2023-12-02 16:33:39,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:39,012 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 760 transitions. [2023-12-02 16:33:39,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:39,012 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 760 transitions. [2023-12-02 16:33:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 16:33:39,013 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:39,013 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:39,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 16:33:39,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 16:33:39,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:39,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:39,614 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:39,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:39,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1446576255, now seen corresponding path program 1 times [2023-12-02 16:33:39,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:39,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1596902689] [2023-12-02 16:33:39,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:39,615 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:39,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:39,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:39,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 16:33:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:39,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:33:39,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:39,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:39,711 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1596902689] [2023-12-02 16:33:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1596902689] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1182134027] [2023-12-02 16:33:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:39,712 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:39,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:39,713 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:39,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 16:33:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:39,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:33:39,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:39,818 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:39,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:39,844 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:39,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1182134027] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:39,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346523822] [2023-12-02 16:33:39,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:39,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:39,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:39,846 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:39,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 16:33:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:39,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:33:39,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:39,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:40,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346523822] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:40,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:40,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2023-12-02 16:33:40,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835218642] [2023-12-02 16:33:40,014 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:40,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:33:40,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:33:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:33:40,016 INFO L87 Difference]: Start difference. First operand 476 states and 760 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:40,335 INFO L93 Difference]: Finished difference Result 1367 states and 2125 transitions. [2023-12-02 16:33:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-02 16:33:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 16:33:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:40,344 INFO L225 Difference]: With dead ends: 1367 [2023-12-02 16:33:40,344 INFO L226 Difference]: Without dead ends: 1367 [2023-12-02 16:33:40,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:33:40,345 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 264 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:40,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 625 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:33:40,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2023-12-02 16:33:40,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1143. [2023-12-02 16:33:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 1131 states have (on average 1.5906277630415562) internal successors, (1799), 1142 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:40,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1799 transitions. [2023-12-02 16:33:40,382 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1799 transitions. Word has length 15 [2023-12-02 16:33:40,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:40,382 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1799 transitions. [2023-12-02 16:33:40,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1799 transitions. [2023-12-02 16:33:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 16:33:40,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:40,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:40,390 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 16:33:40,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2023-12-02 16:33:40,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-12-02 16:33:40,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:40,986 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:40,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:40,986 INFO L85 PathProgramCache]: Analyzing trace with hash 936153864, now seen corresponding path program 1 times [2023-12-02 16:33:40,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:40,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [850824725] [2023-12-02 16:33:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:40,986 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:40,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:40,987 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:40,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-12-02 16:33:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:41,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:41,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,191 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [850824725] [2023-12-02 16:33:41,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [850824725] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:41,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1099396012] [2023-12-02 16:33:41,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:41,191 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:41,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:41,192 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:41,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 16:33:41,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:41,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:41,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:41,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1099396012] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:41,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329366546] [2023-12-02 16:33:41,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:41,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:41,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:41,443 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:41,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 16:33:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:41,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:41,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:41,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329366546] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:41,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:41,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 3 [2023-12-02 16:33:41,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851550976] [2023-12-02 16:33:41,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:41,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 16:33:41,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:41,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 16:33:41,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 16:33:41,637 INFO L87 Difference]: Start difference. First operand 1143 states and 1799 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:41,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:41,748 INFO L93 Difference]: Finished difference Result 1349 states and 2026 transitions. [2023-12-02 16:33:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 16:33:41,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-12-02 16:33:41,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:41,755 INFO L225 Difference]: With dead ends: 1349 [2023-12-02 16:33:41,755 INFO L226 Difference]: Without dead ends: 1349 [2023-12-02 16:33:41,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 130 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 16:33:41,756 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 86 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:41,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 164 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2023-12-02 16:33:41,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1189. [2023-12-02 16:33:41,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1177 states have (on average 1.5335598980458793) internal successors, (1805), 1188 states have internal predecessors, (1805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 1805 transitions. [2023-12-02 16:33:41,788 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 1805 transitions. Word has length 23 [2023-12-02 16:33:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:41,788 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 1805 transitions. [2023-12-02 16:33:41,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 1805 transitions. [2023-12-02 16:33:41,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 16:33:41,789 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:41,789 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:41,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-02 16:33:41,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:42,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 16:33:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:42,392 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:42,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1970646423, now seen corresponding path program 1 times [2023-12-02 16:33:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:42,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [708140526] [2023-12-02 16:33:42,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:42,393 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:42,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:42,394 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:42,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 16:33:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:42,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:33:42,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:42,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [708140526] [2023-12-02 16:33:42,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [708140526] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:42,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [13257311] [2023-12-02 16:33:42,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:42,540 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:42,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:42,541 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:42,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-12-02 16:33:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:42,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:33:42,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [13257311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:42,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262586366] [2023-12-02 16:33:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:42,706 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:42,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 16:33:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:42,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 16:33:42,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262586366] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:42,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:42,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2023-12-02 16:33:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079069852] [2023-12-02 16:33:42,892 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 16:33:42,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:42,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 16:33:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 16:33:42,893 INFO L87 Difference]: Start difference. First operand 1189 states and 1805 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:43,410 INFO L93 Difference]: Finished difference Result 1331 states and 1897 transitions. [2023-12-02 16:33:43,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 16:33:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 16:33:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:43,417 INFO L225 Difference]: With dead ends: 1331 [2023-12-02 16:33:43,417 INFO L226 Difference]: Without dead ends: 1331 [2023-12-02 16:33:43,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2023-12-02 16:33:43,418 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 250 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:43,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 752 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:33:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2023-12-02 16:33:43,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1163. [2023-12-02 16:33:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 1151 states have (on average 1.5117289313640312) internal successors, (1740), 1162 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:43,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 1740 transitions. [2023-12-02 16:33:43,441 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 1740 transitions. Word has length 26 [2023-12-02 16:33:43,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:43,442 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 1740 transitions. [2023-12-02 16:33:43,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 9 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:43,442 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 1740 transitions. [2023-12-02 16:33:43,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:33:43,444 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:43,444 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:43,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 16:33:43,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2023-12-02 16:33:43,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:44,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:44,045 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:44,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:44,046 INFO L85 PathProgramCache]: Analyzing trace with hash 848437669, now seen corresponding path program 1 times [2023-12-02 16:33:44,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:44,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [382912542] [2023-12-02 16:33:44,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:44,046 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:44,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:44,047 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:44,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 16:33:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:44,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:33:44,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:44,205 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:33:44,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:33:44,377 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [382912542] [2023-12-02 16:33:44,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [382912542] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:44,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1023131064] [2023-12-02 16:33:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:44,378 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:44,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:44,379 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:44,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-02 16:33:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:44,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 16:33:44,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:33:44,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:44,654 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 32 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 16:33:44,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1023131064] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:44,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263603198] [2023-12-02 16:33:44,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:44,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:44,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:44,656 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:44,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-02 16:33:44,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:44,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:33:44,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:44,832 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:33:44,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:44,910 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 16:33:44,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263603198] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:33:44,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2023-12-02 16:33:44,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 6, 6, 6, 7] total 20 [2023-12-02 16:33:44,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201846340] [2023-12-02 16:33:44,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:44,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 16:33:44,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:44,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 16:33:44,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2023-12-02 16:33:44,912 INFO L87 Difference]: Start difference. First operand 1163 states and 1740 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:45,096 INFO L93 Difference]: Finished difference Result 1510 states and 2231 transitions. [2023-12-02 16:33:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:33:45,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:33:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:45,106 INFO L225 Difference]: With dead ends: 1510 [2023-12-02 16:33:45,106 INFO L226 Difference]: Without dead ends: 1510 [2023-12-02 16:33:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-12-02 16:33:45,107 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 162 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 241 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:45,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2023-12-02 16:33:45,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1321. [2023-12-02 16:33:45,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1321 states, 1309 states have (on average 1.5148968678380443) internal successors, (1983), 1320 states have internal predecessors, (1983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1321 states to 1321 states and 1983 transitions. [2023-12-02 16:33:45,147 INFO L78 Accepts]: Start accepts. Automaton has 1321 states and 1983 transitions. Word has length 39 [2023-12-02 16:33:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:45,147 INFO L495 AbstractCegarLoop]: Abstraction has 1321 states and 1983 transitions. [2023-12-02 16:33:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1321 states and 1983 transitions. [2023-12-02 16:33:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 16:33:45,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:45,149 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:45,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:45,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:45,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:45,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:45,751 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:45,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:45,751 INFO L85 PathProgramCache]: Analyzing trace with hash -253720381, now seen corresponding path program 1 times [2023-12-02 16:33:45,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:45,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1372378953] [2023-12-02 16:33:45,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:45,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:45,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:45,752 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:45,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-12-02 16:33:45,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:45,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:33:45,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:45,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:46,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1372378953] [2023-12-02 16:33:46,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1372378953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:46,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1023835622] [2023-12-02 16:33:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:46,135 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:46,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:46,135 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:46,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2023-12-02 16:33:46,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:46,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:33:46,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:46,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:46,409 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:46,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1023835622] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:46,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314859238] [2023-12-02 16:33:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:46,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:46,411 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:46,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-02 16:33:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:46,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:33:46,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:46,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:33:46,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314859238] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:46,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:46,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 7] total 23 [2023-12-02 16:33:46,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657773215] [2023-12-02 16:33:46,651 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:46,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-02 16:33:46,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:46,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-02 16:33:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-12-02 16:33:46,653 INFO L87 Difference]: Start difference. First operand 1321 states and 1983 transitions. Second operand has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:47,782 INFO L93 Difference]: Finished difference Result 2769 states and 4023 transitions. [2023-12-02 16:33:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 16:33:47,783 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-12-02 16:33:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:47,796 INFO L225 Difference]: With dead ends: 2769 [2023-12-02 16:33:47,797 INFO L226 Difference]: Without dead ends: 2769 [2023-12-02 16:33:47,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=535, Invalid=1535, Unknown=0, NotChecked=0, Total=2070 [2023-12-02 16:33:47,798 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 1515 mSDsluCounter, 1266 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:47,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1515 Valid, 1427 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:33:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2023-12-02 16:33:47,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 2239. [2023-12-02 16:33:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2227 states have (on average 1.519533004041311) internal successors, (3384), 2238 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 3384 transitions. [2023-12-02 16:33:47,854 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 3384 transitions. Word has length 39 [2023-12-02 16:33:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:47,854 INFO L495 AbstractCegarLoop]: Abstraction has 2239 states and 3384 transitions. [2023-12-02 16:33:47,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.304347826086956) internal successors, (122), 23 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 3384 transitions. [2023-12-02 16:33:47,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 16:33:47,855 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:47,856 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:47,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2023-12-02 16:33:48,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-12-02 16:33:48,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:48,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:48,457 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:48,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:48,457 INFO L85 PathProgramCache]: Analyzing trace with hash -830315202, now seen corresponding path program 1 times [2023-12-02 16:33:48,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:48,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90590502] [2023-12-02 16:33:48,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:48,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:48,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:48,459 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:48,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-12-02 16:33:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:48,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:33:48,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:48,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:48,701 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90590502] [2023-12-02 16:33:48,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90590502] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:48,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [83423060] [2023-12-02 16:33:48,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:48,701 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:48,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:48,702 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:48,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 16:33:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:48,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:33:48,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:48,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:48,916 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:48,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [83423060] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:48,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008055259] [2023-12-02 16:33:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:48,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:48,918 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:48,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-12-02 16:33:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:49,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:33:49,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:49,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-12-02 16:33:49,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008055259] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 16:33:49,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2023-12-02 16:33:49,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 7, 7, 7, 9] total 17 [2023-12-02 16:33:49,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870035732] [2023-12-02 16:33:49,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 16:33:49,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 16:33:49,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 16:33:49,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-12-02 16:33:49,134 INFO L87 Difference]: Start difference. First operand 2239 states and 3384 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:49,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:49,272 INFO L93 Difference]: Finished difference Result 3232 states and 4784 transitions. [2023-12-02 16:33:49,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:33:49,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 16:33:49,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:49,296 INFO L225 Difference]: With dead ends: 3232 [2023-12-02 16:33:49,296 INFO L226 Difference]: Without dead ends: 3232 [2023-12-02 16:33:49,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-12-02 16:33:49,297 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:49,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 212 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 16:33:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3232 states. [2023-12-02 16:33:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3232 to 3031. [2023-12-02 16:33:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3031 states, 3019 states have (on average 1.5004968532626697) internal successors, (4530), 3030 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:49,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3031 states to 3031 states and 4530 transitions. [2023-12-02 16:33:49,360 INFO L78 Accepts]: Start accepts. Automaton has 3031 states and 4530 transitions. Word has length 41 [2023-12-02 16:33:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:49,361 INFO L495 AbstractCegarLoop]: Abstraction has 3031 states and 4530 transitions. [2023-12-02 16:33:49,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3031 states and 4530 transitions. [2023-12-02 16:33:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 16:33:49,362 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:49,362 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:49,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-12-02 16:33:49,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-12-02 16:33:49,765 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 16:33:49,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:49,964 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:49,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:49,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1765229507, now seen corresponding path program 1 times [2023-12-02 16:33:49,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:49,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1505371149] [2023-12-02 16:33:49,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:49,965 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:49,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:49,966 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:49,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-12-02 16:33:50,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:50,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:33:50,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:50,092 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:50,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:50,134 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1505371149] [2023-12-02 16:33:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1505371149] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1670371716] [2023-12-02 16:33:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:50,134 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:50,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:50,135 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:50,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-12-02 16:33:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:50,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 16:33:50,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:50,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:50,341 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:50,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1670371716] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:50,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145306344] [2023-12-02 16:33:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:50,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:50,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:50,342 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:50,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-12-02 16:33:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:50,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 16:33:50,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:50,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 32 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 16:33:50,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145306344] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:50,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:50,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 9, 7] total 16 [2023-12-02 16:33:50,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289277163] [2023-12-02 16:33:50,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:50,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:33:50,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:50,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:33:50,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:33:50,595 INFO L87 Difference]: Start difference. First operand 3031 states and 4530 transitions. Second operand has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:51,380 INFO L93 Difference]: Finished difference Result 5123 states and 7477 transitions. [2023-12-02 16:33:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-02 16:33:51,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-12-02 16:33:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:51,400 INFO L225 Difference]: With dead ends: 5123 [2023-12-02 16:33:51,400 INFO L226 Difference]: Without dead ends: 5123 [2023-12-02 16:33:51,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=1074, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 16:33:51,401 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 688 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:51,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 1442 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:33:51,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2023-12-02 16:33:51,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 3700. [2023-12-02 16:33:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3700 states, 3688 states have (on average 1.5105748373101953) internal successors, (5571), 3699 states have internal predecessors, (5571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:51,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3700 states to 3700 states and 5571 transitions. [2023-12-02 16:33:51,457 INFO L78 Accepts]: Start accepts. Automaton has 3700 states and 5571 transitions. Word has length 42 [2023-12-02 16:33:51,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:51,457 INFO L495 AbstractCegarLoop]: Abstraction has 3700 states and 5571 transitions. [2023-12-02 16:33:51,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.375) internal successors, (86), 16 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:51,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3700 states and 5571 transitions. [2023-12-02 16:33:51,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-12-02 16:33:51,458 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:51,459 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:51,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-12-02 16:33:51,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:51,861 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2023-12-02 16:33:52,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:52,060 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:52,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:52,060 INFO L85 PathProgramCache]: Analyzing trace with hash 293999540, now seen corresponding path program 1 times [2023-12-02 16:33:52,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:52,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1616261242] [2023-12-02 16:33:52,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:52,061 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:52,061 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:52,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-12-02 16:33:52,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:52,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:33:52,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:52,255 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,311 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:52,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1616261242] [2023-12-02 16:33:52,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1616261242] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:52,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672837120] [2023-12-02 16:33:52,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:52,312 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:52,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:52,312 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:52,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 16:33:52,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:52,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 16:33:52,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:52,537 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672837120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:52,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753374798] [2023-12-02 16:33:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:52,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:52,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:52,539 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:52,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 16:33:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:52,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:33:52,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 19 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 16:33:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753374798] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:52,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:52,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 15 [2023-12-02 16:33:52,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878296567] [2023-12-02 16:33:52,818 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:52,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 16:33:52,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:52,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 16:33:52,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-12-02 16:33:52,820 INFO L87 Difference]: Start difference. First operand 3700 states and 5571 transitions. Second operand has 16 states, 16 states have (on average 6.1875) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:53,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:53,804 INFO L93 Difference]: Finished difference Result 5122 states and 7555 transitions. [2023-12-02 16:33:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-12-02 16:33:53,805 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.1875) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-12-02 16:33:53,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:53,822 INFO L225 Difference]: With dead ends: 5122 [2023-12-02 16:33:53,822 INFO L226 Difference]: Without dead ends: 5122 [2023-12-02 16:33:53,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=1754, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 16:33:53,824 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 837 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:53,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [837 Valid, 1748 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 16:33:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5122 states. [2023-12-02 16:33:53,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5122 to 4729. [2023-12-02 16:33:53,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4729 states, 4717 states have (on average 1.5263938944244222) internal successors, (7200), 4728 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4729 states to 4729 states and 7200 transitions. [2023-12-02 16:33:53,888 INFO L78 Accepts]: Start accepts. Automaton has 4729 states and 7200 transitions. Word has length 52 [2023-12-02 16:33:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:53,889 INFO L495 AbstractCegarLoop]: Abstraction has 4729 states and 7200 transitions. [2023-12-02 16:33:53,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.1875) internal successors, (99), 15 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4729 states and 7200 transitions. [2023-12-02 16:33:53,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-02 16:33:53,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:53,890 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:33:53,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2023-12-02 16:33:54,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2023-12-02 16:33:54,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 16:33:54,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:54,491 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:54,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:54,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2122980990, now seen corresponding path program 1 times [2023-12-02 16:33:54,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:54,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1016536430] [2023-12-02 16:33:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:54,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:54,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:54,493 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:54,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-12-02 16:33:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:54,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:54,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:54,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:54,709 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:54,709 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:54,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1016536430] [2023-12-02 16:33:54,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1016536430] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:54,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [986965325] [2023-12-02 16:33:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:54,710 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:54,711 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:54,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2023-12-02 16:33:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:54,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:54,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:54,893 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:54,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [986965325] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:54,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925047280] [2023-12-02 16:33:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:54,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:54,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:54,967 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:54,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-12-02 16:33:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:55,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 16:33:55,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:55,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-02 16:33:55,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925047280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:55,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:55,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 5 [2023-12-02 16:33:55,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469218449] [2023-12-02 16:33:55,188 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 16:33:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 16:33:55,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 16:33:55,189 INFO L87 Difference]: Start difference. First operand 4729 states and 7200 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:55,403 INFO L93 Difference]: Finished difference Result 8859 states and 13462 transitions. [2023-12-02 16:33:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 16:33:55,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-12-02 16:33:55,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:55,422 INFO L225 Difference]: With dead ends: 8859 [2023-12-02 16:33:55,422 INFO L226 Difference]: Without dead ends: 8859 [2023-12-02 16:33:55,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 371 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:33:55,423 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 100 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:55,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 205 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 16:33:55,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8859 states. [2023-12-02 16:33:55,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8859 to 8131. [2023-12-02 16:33:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8131 states, 8119 states have (on average 1.529252370981648) internal successors, (12416), 8130 states have internal predecessors, (12416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:55,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8131 states to 8131 states and 12416 transitions. [2023-12-02 16:33:55,551 INFO L78 Accepts]: Start accepts. Automaton has 8131 states and 12416 transitions. Word has length 63 [2023-12-02 16:33:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:55,551 INFO L495 AbstractCegarLoop]: Abstraction has 8131 states and 12416 transitions. [2023-12-02 16:33:55,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 8131 states and 12416 transitions. [2023-12-02 16:33:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 16:33:55,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:55,553 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 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 16:33:55,555 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2023-12-02 16:33:55,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (40)] Ended with exit code 0 [2023-12-02 16:33:55,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-12-02 16:33:56,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:56,154 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:56,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:56,154 INFO L85 PathProgramCache]: Analyzing trace with hash -974106543, now seen corresponding path program 1 times [2023-12-02 16:33:56,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:56,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691854827] [2023-12-02 16:33:56,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:56,155 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:56,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:56,156 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:56,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-12-02 16:33:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:56,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:56,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:56,256 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 7 [2023-12-02 16:33:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:56,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:56,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691854827] [2023-12-02 16:33:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691854827] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:56,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2085936157] [2023-12-02 16:33:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:56,419 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:56,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:56,420 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:56,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 16:33:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:56,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 16:33:56,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:56,627 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 16:33:56,627 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 14 treesize of output 20 [2023-12-02 16:33:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:56,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:56,989 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:56,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2085936157] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:56,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577881592] [2023-12-02 16:33:56,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:56,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:56,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:33:56,990 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:33:56,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-12-02 16:33:57,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:57,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 16:33:57,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:57,107 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 7 [2023-12-02 16:33:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:57,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:57,287 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577881592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:33:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2023-12-02 16:33:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777805815] [2023-12-02 16:33:57,287 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:33:57,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 16:33:57,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:33:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 16:33:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-12-02 16:33:57,289 INFO L87 Difference]: Start difference. First operand 8131 states and 12416 transitions. Second operand has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:57,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:33:57,737 INFO L93 Difference]: Finished difference Result 15380 states and 23118 transitions. [2023-12-02 16:33:57,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 16:33:57,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-02 16:33:57,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:33:57,760 INFO L225 Difference]: With dead ends: 15380 [2023-12-02 16:33:57,760 INFO L226 Difference]: Without dead ends: 15380 [2023-12-02 16:33:57,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-12-02 16:33:57,761 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 362 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 16:33:57,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 298 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 16:33:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15380 states. [2023-12-02 16:33:57,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15380 to 13984. [2023-12-02 16:33:57,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13984 states, 13973 states have (on average 1.519358763329278) internal successors, (21230), 13983 states have internal predecessors, (21230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:57,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13984 states to 13984 states and 21230 transitions. [2023-12-02 16:33:57,942 INFO L78 Accepts]: Start accepts. Automaton has 13984 states and 21230 transitions. Word has length 68 [2023-12-02 16:33:57,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:33:57,942 INFO L495 AbstractCegarLoop]: Abstraction has 13984 states and 21230 transitions. [2023-12-02 16:33:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 10.25) internal successors, (82), 9 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:33:57,943 INFO L276 IsEmpty]: Start isEmpty. Operand 13984 states and 21230 transitions. [2023-12-02 16:33:57,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-02 16:33:57,943 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:33:57,944 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 5, 5, 4, 3, 3, 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 16:33:57,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2023-12-02 16:33:58,146 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Ended with exit code 0 [2023-12-02 16:33:58,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-12-02 16:33:58,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:33:58,545 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:33:58,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:33:58,545 INFO L85 PathProgramCache]: Analyzing trace with hash -974106542, now seen corresponding path program 1 times [2023-12-02 16:33:58,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:33:58,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1652188423] [2023-12-02 16:33:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:58,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:33:58,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:33:58,546 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:33:58,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2023-12-02 16:33:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:58,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:33:58,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:58,689 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 16:33:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:59,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:33:59,563 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:33:59,563 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:33:59,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1652188423] [2023-12-02 16:33:59,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1652188423] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:33:59,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [400367538] [2023-12-02 16:33:59,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:33:59,564 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:33:59,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:33:59,565 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:33:59,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 16:33:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:33:59,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:33:59,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:33:59,769 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 16:34:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:34:00,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:00,464 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:34:00,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [400367538] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:00,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173661979] [2023-12-02 16:34:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:00,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:34:00,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:34:00,465 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:34:00,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 16:34:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:00,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:34:00,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:00,591 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 16:34:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:34:00,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2023-12-02 16:34:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173661979] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:01,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:34:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2023-12-02 16:34:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335818539] [2023-12-02 16:34:01,281 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:34:01,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 16:34:01,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:34:01,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 16:34:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 16:34:01,282 INFO L87 Difference]: Start difference. First operand 13984 states and 21230 transitions. Second operand has 8 states, 7 states have (on average 11.0) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:34:02,129 INFO L93 Difference]: Finished difference Result 22652 states and 33722 transitions. [2023-12-02 16:34:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 16:34:02,130 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-12-02 16:34:02,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:34:02,162 INFO L225 Difference]: With dead ends: 22652 [2023-12-02 16:34:02,162 INFO L226 Difference]: Without dead ends: 22652 [2023-12-02 16:34:02,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-12-02 16:34:02,163 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 393 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 16:34:02,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 352 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 16:34:02,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22652 states. [2023-12-02 16:34:02,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22652 to 19925. [2023-12-02 16:34:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19925 states, 19914 states have (on average 1.5092899467711158) internal successors, (30056), 19924 states have internal predecessors, (30056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:02,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19925 states to 19925 states and 30056 transitions. [2023-12-02 16:34:02,449 INFO L78 Accepts]: Start accepts. Automaton has 19925 states and 30056 transitions. Word has length 68 [2023-12-02 16:34:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:34:02,449 INFO L495 AbstractCegarLoop]: Abstraction has 19925 states and 30056 transitions. [2023-12-02 16:34:02,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 11.0) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:02,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19925 states and 30056 transitions. [2023-12-02 16:34:02,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 16:34:02,453 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:34:02,453 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 5, 5, 5, 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, 1, 1] [2023-12-02 16:34:02,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Ended with exit code 0 [2023-12-02 16:34:02,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 16:34:02,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2023-12-02 16:34:03,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:34:03,055 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:34:03,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:34:03,055 INFO L85 PathProgramCache]: Analyzing trace with hash -391901409, now seen corresponding path program 1 times [2023-12-02 16:34:03,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:34:03,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060017631] [2023-12-02 16:34:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:34:03,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:34:03,057 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:34:03,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2023-12-02 16:34:03,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:03,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 16:34:03,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 77 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 16:34:03,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:03,324 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 77 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 16:34:03,325 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 16:34:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060017631] [2023-12-02 16:34:03,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060017631] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:03,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1679163607] [2023-12-02 16:34:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:03,325 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 16:34:03,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 16:34:03,326 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 16:34:03,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2023-12-02 16:34:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:03,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 16:34:03,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 77 proven. 101 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-02 16:34:03,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 77 proven. 57 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-02 16:34:03,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1679163607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:03,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803174989] [2023-12-02 16:34:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:03,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 16:34:03,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 16:34:03,748 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 16:34:03,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 16:34:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 16:34:03,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 16:34:03,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 16:34:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 46 proven. 94 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:34:04,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 16:34:04,156 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 46 proven. 94 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-02 16:34:04,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803174989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 16:34:04,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 16:34:04,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8, 6, 6, 6] total 14 [2023-12-02 16:34:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443984181] [2023-12-02 16:34:04,157 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 16:34:04,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 16:34:04,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 16:34:04,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 16:34:04,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-12-02 16:34:04,159 INFO L87 Difference]: Start difference. First operand 19925 states and 30056 transitions. Second operand has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 16:34:04,726 INFO L93 Difference]: Finished difference Result 40298 states and 59124 transitions. [2023-12-02 16:34:04,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 16:34:04,727 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-12-02 16:34:04,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 16:34:04,788 INFO L225 Difference]: With dead ends: 40298 [2023-12-02 16:34:04,788 INFO L226 Difference]: Without dead ends: 40298 [2023-12-02 16:34:04,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2023-12-02 16:34:04,790 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 908 mSDsluCounter, 1502 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 16:34:04,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1683 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 16:34:04,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40298 states. [2023-12-02 16:34:05,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40298 to 37539. [2023-12-02 16:34:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37539 states, 37528 states have (on average 1.4872095502025156) internal successors, (55812), 37538 states have internal predecessors, (55812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:05,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37539 states to 37539 states and 55812 transitions. [2023-12-02 16:34:05,319 INFO L78 Accepts]: Start accepts. Automaton has 37539 states and 55812 transitions. Word has length 84 [2023-12-02 16:34:05,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 16:34:05,319 INFO L495 AbstractCegarLoop]: Abstraction has 37539 states and 55812 transitions. [2023-12-02 16:34:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.133333333333333) internal successors, (122), 14 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:34:05,319 INFO L276 IsEmpty]: Start isEmpty. Operand 37539 states and 55812 transitions. [2023-12-02 16:34:05,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 16:34:05,323 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 16:34:05,323 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:34:05,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Forceful destruction successful, exit code 0 [2023-12-02 16:34:05,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-12-02 16:34:05,727 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2023-12-02 16:34:05,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 16:34:05,926 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-12-02 16:34:05,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 16:34:05,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1764911483, now seen corresponding path program 1 times [2023-12-02 16:34:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 16:34:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004984953] [2023-12-02 16:34:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 16:34:05,927 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:34:05,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 16:34:05,928 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-02 16:34:05,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2023-12-02 16:34:06,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:34:06,059 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 16:34:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 16:34:06,197 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-12-02 16:34:06,197 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 16:34:06,198 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2023-12-02 16:34:06,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-12-02 16:34:06,199 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-12-02 16:34:06,200 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 20 remaining) [2023-12-02 16:34:06,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 20 remaining) [2023-12-02 16:34:06,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 20 remaining) [2023-12-02 16:34:06,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2023-12-02 16:34:06,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2023-12-02 16:34:06,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2023-12-02 16:34:06,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Ended with exit code 0 [2023-12-02 16:34:06,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 16:34:06,406 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 16:34:06,409 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 16:34:06,539 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:34:06,540 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,540 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,541 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,541 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,541 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,542 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,542 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,543 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,543 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,543 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,544 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,545 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,545 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,545 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,546 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,546 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,547 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,547 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,547 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,548 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,548 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,549 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,549 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated [2023-12-02 16:34:06,550 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated [2023-12-02 16:34:06,550 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,551 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:34:06,551 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:34:06,551 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,552 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:34:06,552 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:34:06,553 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,553 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:34:06,554 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:34:06,554 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,555 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated [2023-12-02 16:34:06,555 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated [2023-12-02 16:34:06,556 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated [2023-12-02 16:34:06,556 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated [2023-12-02 16:34:06,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 04:34:06 BoogieIcfgContainer [2023-12-02 16:34:06,569 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 16:34:06,570 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 16:34:06,570 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 16:34:06,570 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 16:34:06,571 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 04:33:34" (3/4) ... [2023-12-02 16:34:06,573 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-12-02 16:34:06,574 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 16:34:06,574 INFO L158 Benchmark]: Toolchain (without parser) took 33666.19ms. Allocated memory was 94.4MB in the beginning and 604.0MB in the end (delta: 509.6MB). Free memory was 69.6MB in the beginning and 377.8MB in the end (delta: -308.2MB). Peak memory consumption was 203.2MB. Max. memory is 16.1GB. [2023-12-02 16:34:06,575 INFO L158 Benchmark]: CDTParser took 0.39ms. Allocated memory is still 65.0MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:34:06,575 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.40ms. Allocated memory is still 94.4MB. Free memory was 69.4MB in the beginning and 50.9MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 16:34:06,575 INFO L158 Benchmark]: Boogie Procedure Inliner took 98.69ms. Allocated memory is still 94.4MB. Free memory was 50.9MB in the beginning and 71.4MB in the end (delta: -20.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 16:34:06,576 INFO L158 Benchmark]: Boogie Preprocessor took 34.38ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:34:06,576 INFO L158 Benchmark]: RCFGBuilder took 558.68ms. Allocated memory is still 94.4MB. Free memory was 69.3MB in the beginning and 45.2MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2023-12-02 16:34:06,577 INFO L158 Benchmark]: TraceAbstraction took 32500.92ms. Allocated memory was 94.4MB in the beginning and 604.0MB in the end (delta: 509.6MB). Free memory was 44.7MB in the beginning and 377.8MB in the end (delta: -333.1MB). Peak memory consumption was 268.1MB. Max. memory is 16.1GB. [2023-12-02 16:34:06,577 INFO L158 Benchmark]: Witness Printer took 4.08ms. Allocated memory is still 604.0MB. Free memory is still 377.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 16:34:06,579 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39ms. Allocated memory is still 65.0MB. Free memory is still 40.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.40ms. Allocated memory is still 94.4MB. Free memory was 69.4MB in the beginning and 50.9MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 98.69ms. Allocated memory is still 94.4MB. Free memory was 50.9MB in the beginning and 71.4MB in the end (delta: -20.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.38ms. Allocated memory is still 94.4MB. Free memory was 71.4MB in the beginning and 69.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 558.68ms. Allocated memory is still 94.4MB. Free memory was 69.3MB in the beginning and 45.2MB in the end (delta: 24.1MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 32500.92ms. Allocated memory was 94.4MB in the beginning and 604.0MB in the end (delta: 509.6MB). Free memory was 44.7MB in the beginning and 377.8MB in the end (delta: -333.1MB). Peak memory consumption was 268.1MB. Max. memory is 16.1GB. * Witness Printer took 4.08ms. Allocated memory is still 604.0MB. Free memory is still 377.8MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch4 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post3 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~switch7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~post6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short11 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet10 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) [L538] x1->data = 0 VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=2, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L542] x1->data = 4 VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=3, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L545] t1 = S VAL [S={0:0}, garbage={0:0}, pc1=4, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=4, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L548] x1->next = t1 VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=5, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L552] S = x1 VAL [S={6:0}, garbage={0:0}, pc1=6, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={6:0}, garbage={0:0}, pc1=6, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L596] CALL push() [L535] pc1++ [L536] case 1: [L541] case 2: [L544] case 3: [L547] case 4: [L550] case 5: [L556] case 6: [L557] pc1 = 1 VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L596] RET push() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=1, res4=0, t1={0:0}, t4={0:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L569] t4 = S VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=2, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=2, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=3, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=3, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=4, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L576] EXPR t4->next [L576] x4 = t4->next [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={6:0}, garbage={0:0}, pc1=1, pc4=4, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc1 || __VERIFIER_nondet_int() [L595] COND FALSE !(__VERIFIER_nondet_int()) [L598] CALL pop() [L567] pc4++ [L568] case 1: [L571] case 2: [L575] case 3: [L578] case 4: [L580] S = x4 VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L598] RET pop() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() [L594] S || 1 != pc1 || __VERIFIER_nondet_int() VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc1 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [S={0:0}, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={6:0}, x1={6:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [S={0:0}, \result=0, garbage={0:0}, pc1=1, pc4=5, res4=0, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 32.3s, OverallIterations: 23, TraceHistogramMax: 11, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6277 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6277 mSDsluCounter, 10666 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8626 mSDsCounter, 419 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3343 IncrementalHoareTripleChecker+Invalid, 3762 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 419 mSolverCounterUnsat, 2040 mSDtfsCounter, 3343 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3625 GetRequests, 3338 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 2.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37539occurred in iteration=22, InterpolantAutomatonStates: 253, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.6s AutomataMinimizationTime, 22 MinimizatonAttempts, 11080 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 7.9s InterpolantComputationTime, 1905 NumberOfCodeBlocks, 1905 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 3460 ConstructedInterpolants, 0 QuantifiedInterpolants, 15838 SizeOfPredicates, 178 NumberOfNonLiveVariables, 6249 ConjunctsInSsa, 354 ConjunctsInUnsatCore, 89 InterpolantComputations, 11 PerfectInterpolantSequences, 3229/5913 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-02 16:34:06,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_789465ab-f01c-4d52-8f5c-105e819f31be/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample