./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-lit/sssc12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 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_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5 --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 f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 19:40:18,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 19:40:18,149 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-21 19:40:18,158 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 19:40:18,159 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 19:40:18,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 19:40:18,218 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 19:40:18,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 19:40:18,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 19:40:18,224 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 19:40:18,225 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-21 19:40:18,226 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-21 19:40:18,227 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-21 19:40:18,229 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-21 19:40:18,229 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-21 19:40:18,230 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-21 19:40:18,230 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-21 19:40:18,231 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-21 19:40:18,231 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-21 19:40:18,232 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-21 19:40:18,232 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-21 19:40:18,233 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-21 19:40:18,234 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 19:40:18,234 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 19:40:18,235 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 19:40:18,235 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 19:40:18,236 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 19:40:18,236 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 19:40:18,237 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 19:40:18,237 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 19:40:18,239 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 19:40:18,239 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 19:40:18,239 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 19:40:18,239 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 19:40:18,240 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 19:40:18,240 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 19:40:18,240 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 19:40:18,240 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 19:40:18,241 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 19:40:18,241 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 19:40:18,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:40:18,242 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 19:40:18,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 19:40:18,242 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-21 19:40:18,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 19:40:18,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 19:40:18,243 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-21 19:40:18,243 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 19:40:18,244 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_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2023-11-21 19:40:18,555 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 19:40:18,607 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 19:40:18,613 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 19:40:18,614 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 19:40:18,615 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 19:40:18,617 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/../../sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-21 19:40:21,684 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 19:40:22,006 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 19:40:22,007 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/sv-benchmarks/c/pthread-lit/sssc12.i [2023-11-21 19:40:22,033 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/data/23cff12bf/431817150e3e4a808851e706ce06802b/FLAG39f3ee767 [2023-11-21 19:40:22,051 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/data/23cff12bf/431817150e3e4a808851e706ce06802b [2023-11-21 19:40:22,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 19:40:22,062 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 19:40:22,063 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 19:40:22,064 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 19:40:22,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 19:40:22,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:22,071 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@184bcd44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22, skipping insertion in model container [2023-11-21 19:40:22,072 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:22,127 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 19:40:22,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:40:22,757 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 19:40:22,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 19:40:22,919 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:40:22,920 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-21 19:40:22,928 INFO L206 MainTranslator]: Completed translation [2023-11-21 19:40:22,928 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22 WrapperNode [2023-11-21 19:40:22,929 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 19:40:22,930 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 19:40:22,930 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 19:40:22,930 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 19:40:22,938 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:22,974 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,010 INFO L138 Inliner]: procedures = 275, calls = 24, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2023-11-21 19:40:23,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 19:40:23,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 19:40:23,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 19:40:23,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 19:40:23,021 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,022 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,046 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,059 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,062 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,063 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 19:40:23,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 19:40:23,068 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 19:40:23,068 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 19:40:23,069 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (1/1) ... [2023-11-21 19:40:23,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 19:40:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/z3 [2023-11-21 19:40:23,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 19:40:23,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3823cb12-1e8d-4ef9-a09f-b7731455dae1/bin/utaipan-verify-QoSU8krkJ5/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 19:40:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-21 19:40:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-11-21 19:40:23,149 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-11-21 19:40:23,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 19:40:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 19:40:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-21 19:40:23,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 19:40:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 19:40:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 19:40:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 19:40:23,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 19:40:23,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 19:40:23,154 WARN L212 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-21 19:40:23,404 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 19:40:23,406 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 19:40:23,634 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 19:40:23,856 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 19:40:23,857 INFO L308 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-21 19:40:23,858 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:40:23 BoogieIcfgContainer [2023-11-21 19:40:23,858 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 19:40:23,870 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 19:40:23,870 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 19:40:23,872 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 19:40:23,873 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 07:40:22" (1/3) ... [2023-11-21 19:40:23,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc4e5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:40:23, skipping insertion in model container [2023-11-21 19:40:23,874 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 07:40:22" (2/3) ... [2023-11-21 19:40:23,874 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bc4e5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 07:40:23, skipping insertion in model container [2023-11-21 19:40:23,875 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 07:40:23" (3/3) ... [2023-11-21 19:40:23,876 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-11-21 19:40:23,896 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 19:40:23,896 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-21 19:40:23,896 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-21 19:40:23,956 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:40:23,983 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 29 transitions, 62 flow [2023-11-21 19:40:24,014 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 167 states, 145 states have (on average 2.2758620689655173) internal successors, (330), 166 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:24,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:40:24,038 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;@4823fcf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:40:24,038 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-11-21 19:40:24,042 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 145 states have (on average 2.2758620689655173) internal successors, (330), 166 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:24,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:24,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:24,049 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 19:40:24,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 282451, now seen corresponding path program 1 times [2023-11-21 19:40:24,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:24,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632344004] [2023-11-21 19:40:24,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:24,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:24,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:24,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632344004] [2023-11-21 19:40:24,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632344004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:24,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:24,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:24,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105447932] [2023-11-21 19:40:24,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:24,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:24,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:24,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:24,572 INFO L87 Difference]: Start difference. First operand has 167 states, 145 states have (on average 2.2758620689655173) internal successors, (330), 166 states have internal predecessors, (330), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:24,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:24,633 INFO L93 Difference]: Finished difference Result 95 states and 170 transitions. [2023-11-21 19:40:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:24,649 INFO L225 Difference]: With dead ends: 95 [2023-11-21 19:40:24,649 INFO L226 Difference]: Without dead ends: 95 [2023-11-21 19:40:24,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:24,658 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:24,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:40:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-21 19:40:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-21 19:40:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.9767441860465116) internal successors, (170), 94 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 170 transitions. [2023-11-21 19:40:24,703 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 170 transitions. Word has length 3 [2023-11-21 19:40:24,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:24,703 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 170 transitions. [2023-11-21 19:40:24,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 170 transitions. [2023-11-21 19:40:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:24,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:24,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:24,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 19:40:24,705 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 19:40:24,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 282452, now seen corresponding path program 1 times [2023-11-21 19:40:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940898796] [2023-11-21 19:40:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:25,008 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:25,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940898796] [2023-11-21 19:40:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940898796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096197273] [2023-11-21 19:40:25,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:25,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:25,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:25,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:25,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,012 INFO L87 Difference]: Start difference. First operand 95 states and 170 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:25,059 INFO L93 Difference]: Finished difference Result 79 states and 139 transitions. [2023-11-21 19:40:25,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:25,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:25,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:25,062 INFO L225 Difference]: With dead ends: 79 [2023-11-21 19:40:25,063 INFO L226 Difference]: Without dead ends: 79 [2023-11-21 19:40:25,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,066 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:25,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 6 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:40:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-21 19:40:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-21 19:40:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 78 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2023-11-21 19:40:25,087 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 3 [2023-11-21 19:40:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:25,088 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2023-11-21 19:40:25,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2023-11-21 19:40:25,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 19:40:25,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:25,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-21 19:40:25,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 19:40:25,090 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 7 more)] === [2023-11-21 19:40:25,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash -854908545, now seen corresponding path program 1 times [2023-11-21 19:40:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:25,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557091612] [2023-11-21 19:40:25,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:25,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:25,126 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:40:25,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:25,178 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:40:25,178 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:40:25,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-11-21 19:40:25,183 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-11-21 19:40:25,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-11-21 19:40:25,187 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-11-21 19:40:25,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-11-21 19:40:25,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-11-21 19:40:25,188 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-11-21 19:40:25,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-11-21 19:40:25,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-11-21 19:40:25,189 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-11-21 19:40:25,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 19:40:25,193 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 19:40:25,196 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:40:25,196 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-21 19:40:25,238 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:40:25,242 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 48 transitions, 106 flow [2023-11-21 19:40:25,392 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2710 states, 2613 states have (on average 3.2043628013777266) internal successors, (8373), 2709 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,395 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:40:25,398 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;@4823fcf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:40:25,398 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-11-21 19:40:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand has 2710 states, 2613 states have (on average 3.2043628013777266) internal successors, (8373), 2709 states have internal predecessors, (8373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:25,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:25,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:25,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 19:40:25,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:25,412 INFO L85 PathProgramCache]: Analyzing trace with hash 330115, now seen corresponding path program 1 times [2023-11-21 19:40:25,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:25,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442970963] [2023-11-21 19:40:25,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:25,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:25,526 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:25,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442970963] [2023-11-21 19:40:25,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442970963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:25,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:25,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:25,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705534320] [2023-11-21 19:40:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:25,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:25,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,539 INFO L87 Difference]: Start difference. First operand has 2710 states, 2613 states have (on average 3.2043628013777266) internal successors, (8373), 2709 states have internal predecessors, (8373), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:25,631 INFO L93 Difference]: Finished difference Result 1430 states and 3980 transitions. [2023-11-21 19:40:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:25,656 INFO L225 Difference]: With dead ends: 1430 [2023-11-21 19:40:25,656 INFO L226 Difference]: Without dead ends: 1430 [2023-11-21 19:40:25,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,668 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:25,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:40:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2023-11-21 19:40:25,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1430. [2023-11-21 19:40:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1393 states have (on average 2.857142857142857) internal successors, (3980), 1429 states have internal predecessors, (3980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 3980 transitions. [2023-11-21 19:40:25,819 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 3980 transitions. Word has length 3 [2023-11-21 19:40:25,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:25,820 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 3980 transitions. [2023-11-21 19:40:25,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 3980 transitions. [2023-11-21 19:40:25,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:25,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:25,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:25,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 19:40:25,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 19:40:25,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:25,822 INFO L85 PathProgramCache]: Analyzing trace with hash 330116, now seen corresponding path program 1 times [2023-11-21 19:40:25,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:25,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644708749] [2023-11-21 19:40:25,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:25,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:25,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:25,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644708749] [2023-11-21 19:40:25,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644708749] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:25,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:25,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:25,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100251557] [2023-11-21 19:40:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:25,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:25,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:25,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,898 INFO L87 Difference]: Start difference. First operand 1430 states and 3980 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:25,956 INFO L93 Difference]: Finished difference Result 1189 states and 3274 transitions. [2023-11-21 19:40:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:25,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:25,969 INFO L225 Difference]: With dead ends: 1189 [2023-11-21 19:40:25,969 INFO L226 Difference]: Without dead ends: 1189 [2023-11-21 19:40:25,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:25,970 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:25,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 11 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 19:40:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-11-21 19:40:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2023-11-21 19:40:26,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1173 states have (on average 2.791133844842285) internal successors, (3274), 1188 states have internal predecessors, (3274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3274 transitions. [2023-11-21 19:40:26,027 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3274 transitions. Word has length 3 [2023-11-21 19:40:26,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:26,028 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 3274 transitions. [2023-11-21 19:40:26,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3274 transitions. [2023-11-21 19:40:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-21 19:40:26,030 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:26,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-11-21 19:40:26,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 19:40:26,031 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 10 more)] === [2023-11-21 19:40:26,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1186505265, now seen corresponding path program 1 times [2023-11-21 19:40:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:26,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461846475] [2023-11-21 19:40:26,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:26,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:26,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:40:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:26,078 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:40:26,079 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:40:26,079 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-11-21 19:40:26,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-11-21 19:40:26,079 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-11-21 19:40:26,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-11-21 19:40:26,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-11-21 19:40:26,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-11-21 19:40:26,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-11-21 19:40:26,080 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-11-21 19:40:26,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-11-21 19:40:26,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-11-21 19:40:26,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-11-21 19:40:26,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-11-21 19:40:26,081 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-11-21 19:40:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 19:40:26,082 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-21 19:40:26,082 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:40:26,082 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-21 19:40:26,111 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:40:26,114 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 67 transitions, 152 flow [2023-11-21 19:40:28,256 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 43413 states, 43013 states have (on average 4.252133076046777) internal successors, (182897), 43412 states have internal predecessors, (182897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:28,269 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 19:40:28,270 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;@4823fcf1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 19:40:28,270 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-21 19:40:28,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 43413 states, 43013 states have (on average 4.252133076046777) internal successors, (182897), 43412 states have internal predecessors, (182897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:28,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:28,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:28,470 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:28,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:28,471 INFO L85 PathProgramCache]: Analyzing trace with hash 396646, now seen corresponding path program 1 times [2023-11-21 19:40:28,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:28,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740915011] [2023-11-21 19:40:28,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:28,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:28,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:28,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:28,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740915011] [2023-11-21 19:40:28,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740915011] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:28,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:28,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:28,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143195249] [2023-11-21 19:40:28,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:28,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:28,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:28,693 INFO L87 Difference]: Start difference. First operand has 43413 states, 43013 states have (on average 4.252133076046777) internal successors, (182897), 43412 states have internal predecessors, (182897), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:29,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:29,605 INFO L93 Difference]: Finished difference Result 21455 states and 81155 transitions. [2023-11-21 19:40:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:29,606 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:29,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:29,986 INFO L225 Difference]: With dead ends: 21455 [2023-11-21 19:40:29,987 INFO L226 Difference]: Without dead ends: 21455 [2023-11-21 19:40:29,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:29,988 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:29,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 16 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:40:30,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21455 states. [2023-11-21 19:40:31,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21455 to 21455. [2023-11-21 19:40:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21455 states, 21306 states have (on average 3.8090209330704967) internal successors, (81155), 21454 states have internal predecessors, (81155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:31,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21455 states to 21455 states and 81155 transitions. [2023-11-21 19:40:31,487 INFO L78 Accepts]: Start accepts. Automaton has 21455 states and 81155 transitions. Word has length 3 [2023-11-21 19:40:31,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:31,487 INFO L495 AbstractCegarLoop]: Abstraction has 21455 states and 81155 transitions. [2023-11-21 19:40:31,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:31,487 INFO L276 IsEmpty]: Start isEmpty. Operand 21455 states and 81155 transitions. [2023-11-21 19:40:31,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-21 19:40:31,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:31,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-21 19:40:31,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 19:40:31,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:31,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:31,489 INFO L85 PathProgramCache]: Analyzing trace with hash 396647, now seen corresponding path program 1 times [2023-11-21 19:40:31,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:31,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236270997] [2023-11-21 19:40:31,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:31,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:31,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:31,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236270997] [2023-11-21 19:40:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236270997] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:31,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:31,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:31,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053726857] [2023-11-21 19:40:31,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:31,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:31,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:31,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:31,552 INFO L87 Difference]: Start difference. First operand 21455 states and 81155 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:31,989 INFO L93 Difference]: Finished difference Result 17839 states and 66949 transitions. [2023-11-21 19:40:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-21 19:40:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:32,221 INFO L225 Difference]: With dead ends: 17839 [2023-11-21 19:40:32,234 INFO L226 Difference]: Without dead ends: 17839 [2023-11-21 19:40:32,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:32,235 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:32,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:40:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2023-11-21 19:40:32,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 17839. [2023-11-21 19:40:33,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17839 states, 17775 states have (on average 3.7664697609001405) internal successors, (66949), 17838 states have internal predecessors, (66949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:33,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17839 states to 17839 states and 66949 transitions. [2023-11-21 19:40:33,138 INFO L78 Accepts]: Start accepts. Automaton has 17839 states and 66949 transitions. Word has length 3 [2023-11-21 19:40:33,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:33,138 INFO L495 AbstractCegarLoop]: Abstraction has 17839 states and 66949 transitions. [2023-11-21 19:40:33,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 17839 states and 66949 transitions. [2023-11-21 19:40:33,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:40:33,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:33,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:40:33,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 19:40:33,141 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:33,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:33,142 INFO L85 PathProgramCache]: Analyzing trace with hash 600655797, now seen corresponding path program 1 times [2023-11-21 19:40:33,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:33,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192277717] [2023-11-21 19:40:33,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:33,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:33,447 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:33,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192277717] [2023-11-21 19:40:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192277717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:33,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:33,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 19:40:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960474353] [2023-11-21 19:40:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 19:40:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 19:40:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:33,450 INFO L87 Difference]: Start difference. First operand 17839 states and 66949 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:33,686 INFO L93 Difference]: Finished difference Result 14564 states and 54604 transitions. [2023-11-21 19:40:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 19:40:33,687 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 [2023-11-21 19:40:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:33,843 INFO L225 Difference]: With dead ends: 14564 [2023-11-21 19:40:33,844 INFO L226 Difference]: Without dead ends: 14564 [2023-11-21 19:40:33,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 19:40:33,850 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:33,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 19:40:33,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2023-11-21 19:40:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 14564. [2023-11-21 19:40:34,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14564 states, 14537 states have (on average 3.7562082960720917) internal successors, (54604), 14563 states have internal predecessors, (54604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14564 states to 14564 states and 54604 transitions. [2023-11-21 19:40:34,570 INFO L78 Accepts]: Start accepts. Automaton has 14564 states and 54604 transitions. Word has length 13 [2023-11-21 19:40:34,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:34,571 INFO L495 AbstractCegarLoop]: Abstraction has 14564 states and 54604 transitions. [2023-11-21 19:40:34,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:34,572 INFO L276 IsEmpty]: Start isEmpty. Operand 14564 states and 54604 transitions. [2023-11-21 19:40:34,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:40:34,573 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:34,573 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:40:34,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 19:40:34,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:34,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash 600655798, now seen corresponding path program 1 times [2023-11-21 19:40:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616859503] [2023-11-21 19:40:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:35,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616859503] [2023-11-21 19:40:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616859503] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:35,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:35,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 19:40:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212578465] [2023-11-21 19:40:35,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:35,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:40:35,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:40:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:40:35,217 INFO L87 Difference]: Start difference. First operand 14564 states and 54604 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:35,866 INFO L93 Difference]: Finished difference Result 22884 states and 85804 transitions. [2023-11-21 19:40:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 19:40:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 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 [2023-11-21 19:40:35,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:36,230 INFO L225 Difference]: With dead ends: 22884 [2023-11-21 19:40:36,230 INFO L226 Difference]: Without dead ends: 22884 [2023-11-21 19:40:36,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-21 19:40:36,231 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 159 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:36,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 96 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:40:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22884 states. [2023-11-21 19:40:37,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22884 to 18724. [2023-11-21 19:40:37,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18697 states have (on average 3.866074771353693) internal successors, (72284), 18723 states have internal predecessors, (72284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 72284 transitions. [2023-11-21 19:40:37,205 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 72284 transitions. Word has length 13 [2023-11-21 19:40:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:37,205 INFO L495 AbstractCegarLoop]: Abstraction has 18724 states and 72284 transitions. [2023-11-21 19:40:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 72284 transitions. [2023-11-21 19:40:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 19:40:37,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:37,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 19:40:37,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 19:40:37,208 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:37,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:37,209 INFO L85 PathProgramCache]: Analyzing trace with hash 600656824, now seen corresponding path program 1 times [2023-11-21 19:40:37,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:37,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656734674] [2023-11-21 19:40:37,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:37,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 19:40:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 19:40:37,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-21 19:40:37,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656734674] [2023-11-21 19:40:37,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656734674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 19:40:37,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 19:40:37,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 19:40:37,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518677492] [2023-11-21 19:40:37,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 19:40:37,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-21 19:40:37,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-21 19:40:37,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-21 19:40:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 19:40:37,487 INFO L87 Difference]: Start difference. First operand 18724 states and 72284 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 19:40:38,271 INFO L93 Difference]: Finished difference Result 19764 states and 74104 transitions. [2023-11-21 19:40:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 19:40:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 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 [2023-11-21 19:40:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 19:40:38,404 INFO L225 Difference]: With dead ends: 19764 [2023-11-21 19:40:38,404 INFO L226 Difference]: Without dead ends: 19764 [2023-11-21 19:40:38,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 19:40:38,405 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 19:40:38,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 134 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 19:40:38,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19764 states. [2023-11-21 19:40:39,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19764 to 18724. [2023-11-21 19:40:39,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18724 states, 18697 states have (on average 3.8104508744718406) internal successors, (71244), 18723 states have internal predecessors, (71244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:39,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 71244 transitions. [2023-11-21 19:40:39,141 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 71244 transitions. Word has length 13 [2023-11-21 19:40:39,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 19:40:39,141 INFO L495 AbstractCegarLoop]: Abstraction has 18724 states and 71244 transitions. [2023-11-21 19:40:39,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 19:40:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 71244 transitions. [2023-11-21 19:40:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 19:40:39,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 19:40:39,148 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-11-21 19:40:39,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 19:40:39,148 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-11-21 19:40:39,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 19:40:39,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1715760760, now seen corresponding path program 1 times [2023-11-21 19:40:39,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-21 19:40:39,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575327384] [2023-11-21 19:40:39,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 19:40:39,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 19:40:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:39,173 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 19:40:39,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 19:40:39,200 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-21 19:40:39,200 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 19:40:39,201 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-11-21 19:40:39,201 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-11-21 19:40:39,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-11-21 19:40:39,202 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2023-11-21 19:40:39,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-11-21 19:40:39,203 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-11-21 19:40:39,204 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-11-21 19:40:39,205 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-11-21 19:40:39,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-11-21 19:40:39,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2023-11-21 19:40:39,206 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-11-21 19:40:39,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-11-21 19:40:39,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2023-11-21 19:40:39,208 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-11-21 19:40:39,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-11-21 19:40:39,209 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2023-11-21 19:40:39,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 19:40:39,209 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-11-21 19:40:39,210 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-21 19:40:39,210 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-21 19:40:39,259 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-21 19:40:39,265 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 83 places, 86 transitions, 200 flow