./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 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-lit/sssc12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 14:37:29,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 14:37:29,581 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 14:37:29,588 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 14:37:29,589 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 14:37:29,620 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 14:37:29,621 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 14:37:29,621 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 14:37:29,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 14:37:29,623 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 14:37:29,624 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 14:37:29,624 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 14:37:29,625 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 14:37:29,625 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 14:37:29,626 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 14:37:29,627 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 14:37:29,627 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 14:37:29,628 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 14:37:29,629 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 14:37:29,629 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 14:37:29,630 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 14:37:29,631 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 14:37:29,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 14:37:29,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 14:37:29,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 14:37:29,634 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 14:37:29,635 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 14:37:29,635 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 14:37:29,636 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 14:37:29,636 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 14:37:29,637 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 14:37:29,637 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 14:37:29,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 14:37:29,638 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 14:37:29,638 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 14:37:29,639 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 14:37:29,639 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 14:37:29,639 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 14:37:29,639 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 14:37:29,640 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 14:37:29,640 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:37:29,640 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 14:37:29,641 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 14:37:29,641 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 14:37:29,641 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 14:37:29,641 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 14:37:29,642 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 14:37:29,642 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 14:37:29,642 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_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f04269da33313e0538e960083eba1e7b90d9e89847d2a89d06392d6991a3ed98 [2023-12-02 14:37:29,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 14:37:29,928 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 14:37:29,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 14:37:29,933 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 14:37:29,933 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 14:37:29,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/pthread-lit/sssc12.i [2023-12-02 14:37:32,745 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 14:37:32,985 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 14:37:32,985 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/sv-benchmarks/c/pthread-lit/sssc12.i [2023-12-02 14:37:33,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/data/cb715a06f/9263237295454b808bb889bd48236134/FLAGf26227f44 [2023-12-02 14:37:33,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/data/cb715a06f/9263237295454b808bb889bd48236134 [2023-12-02 14:37:33,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 14:37:33,022 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 14:37:33,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 14:37:33,024 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 14:37:33,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 14:37:33,030 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326c1093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33, skipping insertion in model container [2023-12-02 14:37:33,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,089 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 14:37:33,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:37:33,444 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 14:37:33,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 14:37:33,559 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:37:33,559 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 14:37:33,565 INFO L206 MainTranslator]: Completed translation [2023-12-02 14:37:33,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33 WrapperNode [2023-12-02 14:37:33,566 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 14:37:33,566 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 14:37:33,567 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 14:37:33,567 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 14:37:33,573 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,612 INFO L138 Inliner]: procedures = 275, calls = 24, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 85 [2023-12-02 14:37:33,613 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 14:37:33,613 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 14:37:33,613 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 14:37:33,613 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 14:37:33,620 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,620 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,623 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,634 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,636 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,637 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,640 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 14:37:33,641 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 14:37:33,641 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 14:37:33,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 14:37:33,642 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (1/1) ... [2023-12-02 14:37:33,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 14:37:33,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 14:37:33,667 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 14:37:33,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_39e876af-d62b-4418-836c-6e75b815d942/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 14:37:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 14:37:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure thr [2023-12-02 14:37:33,696 INFO L138 BoogieDeclarations]: Found implementation of procedure thr [2023-12-02 14:37:33,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 14:37:33,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 14:37:33,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 14:37:33,699 WARN L213 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 14:37:33,821 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 14:37:33,823 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 14:37:33,981 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 14:37:34,105 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 14:37:34,105 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 14:37:34,106 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:34 BoogieIcfgContainer [2023-12-02 14:37:34,106 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 14:37:34,108 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 14:37:34,108 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 14:37:34,111 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 14:37:34,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 02:37:33" (1/3) ... [2023-12-02 14:37:34,112 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed91f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:34, skipping insertion in model container [2023-12-02 14:37:34,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 02:37:33" (2/3) ... [2023-12-02 14:37:34,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ed91f3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 02:37:34, skipping insertion in model container [2023-12-02 14:37:34,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 02:37:34" (3/3) ... [2023-12-02 14:37:34,114 INFO L112 eAbstractionObserver]: Analyzing ICFG sssc12.i [2023-12-02 14:37:34,132 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 14:37:34,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 14:37:34,132 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 14:37:34,168 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 14:37:34,197 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 29 places, 29 transitions, 62 flow [2023-12-02 14:37:34,226 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) [2023-12-02 14:37:34,242 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:37:34,249 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;@62764372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:37:34,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-02 14:37:34,252 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) [2023-12-02 14:37:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:34,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:34,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:34,259 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)] === [2023-12-02 14:37:34,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash 282451, now seen corresponding path program 1 times [2023-12-02 14:37:34,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:34,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863332607] [2023-12-02 14:37:34,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:34,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:34,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863332607] [2023-12-02 14:37:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863332607] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:34,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:34,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:34,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752484085] [2023-12-02 14:37:34,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:34,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:34,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:34,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:34,605 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) [2023-12-02 14:37:34,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:34,648 INFO L93 Difference]: Finished difference Result 95 states and 170 transitions. [2023-12-02 14:37:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:34,651 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 [2023-12-02 14:37:34,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:34,660 INFO L225 Difference]: With dead ends: 95 [2023-12-02 14:37:34,660 INFO L226 Difference]: Without dead ends: 95 [2023-12-02 14:37:34,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:34,665 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 [2023-12-02 14:37:34,666 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] [2023-12-02 14:37:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-12-02 14:37:34,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-12-02 14:37:34,698 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) [2023-12-02 14:37:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 170 transitions. [2023-12-02 14:37:34,702 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 170 transitions. Word has length 3 [2023-12-02 14:37:34,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:34,702 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 170 transitions. [2023-12-02 14:37:34,703 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) [2023-12-02 14:37:34,703 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 170 transitions. [2023-12-02 14:37:34,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:34,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:34,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:34,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 14:37:34,704 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)] === [2023-12-02 14:37:34,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash 282452, now seen corresponding path program 1 times [2023-12-02 14:37:34,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:34,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992295369] [2023-12-02 14:37:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:34,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:34,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992295369] [2023-12-02 14:37:34,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992295369] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:34,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:34,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:34,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226591393] [2023-12-02 14:37:34,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:34,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:34,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:34,870 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) [2023-12-02 14:37:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:34,898 INFO L93 Difference]: Finished difference Result 79 states and 139 transitions. [2023-12-02 14:37:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:34,899 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 [2023-12-02 14:37:34,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:34,900 INFO L225 Difference]: With dead ends: 79 [2023-12-02 14:37:34,900 INFO L226 Difference]: Without dead ends: 79 [2023-12-02 14:37:34,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:34,902 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 [2023-12-02 14:37:34,903 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] [2023-12-02 14:37:34,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-12-02 14:37:34,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-12-02 14:37:34,911 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) [2023-12-02 14:37:34,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2023-12-02 14:37:34,913 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 3 [2023-12-02 14:37:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:34,914 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2023-12-02 14:37:34,914 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) [2023-12-02 14:37:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2023-12-02 14:37:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 14:37:34,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:34,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-12-02 14:37:34,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 14:37:34,915 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)] === [2023-12-02 14:37:34,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:34,916 INFO L85 PathProgramCache]: Analyzing trace with hash -854908545, now seen corresponding path program 1 times [2023-12-02 14:37:34,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:34,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912336179] [2023-12-02 14:37:34,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:34,937 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:37:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:34,968 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:37:34,968 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:37:34,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-12-02 14:37:34,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-12-02 14:37:34,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-12-02 14:37:34,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (6 of 10 remaining) [2023-12-02 14:37:34,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-12-02 14:37:34,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 10 remaining) [2023-12-02 14:37:34,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2023-12-02 14:37:34,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 10 remaining) [2023-12-02 14:37:34,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 10 remaining) [2023-12-02 14:37:34,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2023-12-02 14:37:34,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 14:37:34,976 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 14:37:34,978 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:37:34,978 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-02 14:37:35,004 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 14:37:35,006 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 48 transitions, 106 flow [2023-12-02 14:37:35,125 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) [2023-12-02 14:37:35,126 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:37:35,127 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;@62764372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:37:35,127 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-12-02 14:37:35,137 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) [2023-12-02 14:37:35,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:35,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:35,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:35,138 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)] === [2023-12-02 14:37:35,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:35,139 INFO L85 PathProgramCache]: Analyzing trace with hash 330115, now seen corresponding path program 1 times [2023-12-02 14:37:35,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:35,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380739663] [2023-12-02 14:37:35,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:35,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:35,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:35,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:35,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380739663] [2023-12-02 14:37:35,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380739663] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:35,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:35,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:35,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137254951] [2023-12-02 14:37:35,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:35,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:35,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:35,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:35,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:35,216 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) [2023-12-02 14:37:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:35,282 INFO L93 Difference]: Finished difference Result 1430 states and 3980 transitions. [2023-12-02 14:37:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:35,283 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 [2023-12-02 14:37:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:35,301 INFO L225 Difference]: With dead ends: 1430 [2023-12-02 14:37:35,301 INFO L226 Difference]: Without dead ends: 1430 [2023-12-02 14:37:35,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:35,303 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, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:35,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:37:35,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2023-12-02 14:37:35,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1430. [2023-12-02 14:37:35,401 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) [2023-12-02 14:37:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 3980 transitions. [2023-12-02 14:37:35,410 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 3980 transitions. Word has length 3 [2023-12-02 14:37:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:35,411 INFO L495 AbstractCegarLoop]: Abstraction has 1430 states and 3980 transitions. [2023-12-02 14:37:35,411 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) [2023-12-02 14:37:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 3980 transitions. [2023-12-02 14:37:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:35,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:35,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:35,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 14:37:35,412 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)] === [2023-12-02 14:37:35,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:35,412 INFO L85 PathProgramCache]: Analyzing trace with hash 330116, now seen corresponding path program 1 times [2023-12-02 14:37:35,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:35,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734119397] [2023-12-02 14:37:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:35,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:35,480 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734119397] [2023-12-02 14:37:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734119397] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:35,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:35,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041718932] [2023-12-02 14:37:35,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:35,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:35,482 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) [2023-12-02 14:37:35,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:35,534 INFO L93 Difference]: Finished difference Result 1189 states and 3274 transitions. [2023-12-02 14:37:35,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:35,534 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 [2023-12-02 14:37:35,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:35,545 INFO L225 Difference]: With dead ends: 1189 [2023-12-02 14:37:35,545 INFO L226 Difference]: Without dead ends: 1189 [2023-12-02 14:37:35,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:35,547 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 [2023-12-02 14:37:35,547 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] [2023-12-02 14:37:35,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1189 states. [2023-12-02 14:37:35,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1189 to 1189. [2023-12-02 14:37:35,588 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) [2023-12-02 14:37:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3274 transitions. [2023-12-02 14:37:35,596 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3274 transitions. Word has length 3 [2023-12-02 14:37:35,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:35,596 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 3274 transitions. [2023-12-02 14:37:35,596 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) [2023-12-02 14:37:35,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3274 transitions. [2023-12-02 14:37:35,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 14:37:35,597 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:35,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2023-12-02 14:37:35,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 14:37:35,598 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)] === [2023-12-02 14:37:35,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1186505265, now seen corresponding path program 1 times [2023-12-02 14:37:35,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:35,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289469769] [2023-12-02 14:37:35,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:35,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:35,617 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:37:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:35,632 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:37:35,633 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:37:35,633 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 13 remaining) [2023-12-02 14:37:35,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 13 remaining) [2023-12-02 14:37:35,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (9 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 13 remaining) [2023-12-02 14:37:35,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 13 remaining) [2023-12-02 14:37:35,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 13 remaining) [2023-12-02 14:37:35,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 13 remaining) [2023-12-02 14:37:35,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 13 remaining) [2023-12-02 14:37:35,635 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 13 remaining) [2023-12-02 14:37:35,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 14:37:35,636 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-02 14:37:35,636 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:37:35,636 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-02 14:37:35,665 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 14:37:35,668 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 67 transitions, 152 flow [2023-12-02 14:37:37,139 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) [2023-12-02 14:37:37,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:37:37,141 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;@62764372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:37:37,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-12-02 14:37:37,214 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) [2023-12-02 14:37:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:37,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:37,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:37,215 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)] === [2023-12-02 14:37:37,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 396646, now seen corresponding path program 1 times [2023-12-02 14:37:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:37,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15415629] [2023-12-02 14:37:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:37,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:37,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:37,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15415629] [2023-12-02 14:37:37,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15415629] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:37,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:37,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:37,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117793603] [2023-12-02 14:37:37,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:37,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:37,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:37,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:37,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:37,520 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) [2023-12-02 14:37:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:37,924 INFO L93 Difference]: Finished difference Result 21455 states and 81155 transitions. [2023-12-02 14:37:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:37,925 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 [2023-12-02 14:37:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:38,255 INFO L225 Difference]: With dead ends: 21455 [2023-12-02 14:37:38,255 INFO L226 Difference]: Without dead ends: 21455 [2023-12-02 14:37:38,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:38,257 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-12-02 14:37:38,257 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] [2023-12-02 14:37:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21455 states. [2023-12-02 14:37:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21455 to 21455. [2023-12-02 14:37:39,135 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) [2023-12-02 14:37:39,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21455 states to 21455 states and 81155 transitions. [2023-12-02 14:37:39,323 INFO L78 Accepts]: Start accepts. Automaton has 21455 states and 81155 transitions. Word has length 3 [2023-12-02 14:37:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:39,323 INFO L495 AbstractCegarLoop]: Abstraction has 21455 states and 81155 transitions. [2023-12-02 14:37:39,323 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) [2023-12-02 14:37:39,324 INFO L276 IsEmpty]: Start isEmpty. Operand 21455 states and 81155 transitions. [2023-12-02 14:37:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:37:39,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:39,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:37:39,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 14:37:39,325 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)] === [2023-12-02 14:37:39,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 396647, now seen corresponding path program 1 times [2023-12-02 14:37:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:39,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480629104] [2023-12-02 14:37:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:39,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:39,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480629104] [2023-12-02 14:37:39,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480629104] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:39,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:39,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:39,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342683857] [2023-12-02 14:37:39,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:39,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:39,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:39,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:39,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:39,400 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) [2023-12-02 14:37:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:39,637 INFO L93 Difference]: Finished difference Result 17839 states and 66949 transitions. [2023-12-02 14:37:39,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:39,637 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 [2023-12-02 14:37:39,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:39,755 INFO L225 Difference]: With dead ends: 17839 [2023-12-02 14:37:39,755 INFO L226 Difference]: Without dead ends: 17839 [2023-12-02 14:37:39,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:39,757 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, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:39,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:37:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17839 states. [2023-12-02 14:37:40,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17839 to 17839. [2023-12-02 14:37:40,370 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) [2023-12-02 14:37:40,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17839 states to 17839 states and 66949 transitions. [2023-12-02 14:37:40,429 INFO L78 Accepts]: Start accepts. Automaton has 17839 states and 66949 transitions. Word has length 3 [2023-12-02 14:37:40,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:40,429 INFO L495 AbstractCegarLoop]: Abstraction has 17839 states and 66949 transitions. [2023-12-02 14:37:40,429 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) [2023-12-02 14:37:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17839 states and 66949 transitions. [2023-12-02 14:37:40,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:37:40,431 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:40,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:37:40,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 14:37:40,431 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-12-02 14:37:40,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:40,432 INFO L85 PathProgramCache]: Analyzing trace with hash 600655797, now seen corresponding path program 1 times [2023-12-02 14:37:40,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:40,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605519259] [2023-12-02 14:37:40,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:40,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:40,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:40,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605519259] [2023-12-02 14:37:40,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605519259] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:40,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:40,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:37:40,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534463706] [2023-12-02 14:37:40,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:40,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:37:40,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:40,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:37:40,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:40,499 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) [2023-12-02 14:37:40,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:40,634 INFO L93 Difference]: Finished difference Result 14564 states and 54604 transitions. [2023-12-02 14:37:40,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:37:40,634 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 [2023-12-02 14:37:40,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:40,694 INFO L225 Difference]: With dead ends: 14564 [2023-12-02 14:37:40,694 INFO L226 Difference]: Without dead ends: 14564 [2023-12-02 14:37:40,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:37:40,695 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, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:40,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 13 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 14:37:40,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14564 states. [2023-12-02 14:37:41,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14564 to 14564. [2023-12-02 14:37:41,159 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) [2023-12-02 14:37:41,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14564 states to 14564 states and 54604 transitions. [2023-12-02 14:37:41,228 INFO L78 Accepts]: Start accepts. Automaton has 14564 states and 54604 transitions. Word has length 13 [2023-12-02 14:37:41,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:41,229 INFO L495 AbstractCegarLoop]: Abstraction has 14564 states and 54604 transitions. [2023-12-02 14:37:41,229 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) [2023-12-02 14:37:41,229 INFO L276 IsEmpty]: Start isEmpty. Operand 14564 states and 54604 transitions. [2023-12-02 14:37:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:37:41,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:41,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:37:41,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 14:37:41,231 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-12-02 14:37:41,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 600655798, now seen corresponding path program 1 times [2023-12-02 14:37:41,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:41,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741696992] [2023-12-02 14:37:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:41,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:41,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:41,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741696992] [2023-12-02 14:37:41,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741696992] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:41,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:41,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:37:41,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464583537] [2023-12-02 14:37:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:41,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:37:41,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:37:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:37:41,665 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) [2023-12-02 14:37:42,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:42,272 INFO L93 Difference]: Finished difference Result 22884 states and 85804 transitions. [2023-12-02 14:37:42,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:37:42,273 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 [2023-12-02 14:37:42,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:42,369 INFO L225 Difference]: With dead ends: 22884 [2023-12-02 14:37:42,369 INFO L226 Difference]: Without dead ends: 22884 [2023-12-02 14:37:42,370 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 [2023-12-02 14:37:42,370 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 [2023-12-02 14:37:42,371 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] [2023-12-02 14:37:42,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22884 states. [2023-12-02 14:37:43,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22884 to 18724. [2023-12-02 14:37:43,038 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) [2023-12-02 14:37:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 72284 transitions. [2023-12-02 14:37:43,125 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 72284 transitions. Word has length 13 [2023-12-02 14:37:43,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:43,125 INFO L495 AbstractCegarLoop]: Abstraction has 18724 states and 72284 transitions. [2023-12-02 14:37:43,125 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) [2023-12-02 14:37:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 72284 transitions. [2023-12-02 14:37:43,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:37:43,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:43,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:37:43,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 14:37:43,127 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thrErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 13 more)] === [2023-12-02 14:37:43,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:43,127 INFO L85 PathProgramCache]: Analyzing trace with hash 600656824, now seen corresponding path program 1 times [2023-12-02 14:37:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:43,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792047732] [2023-12-02 14:37:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:37:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:37:43,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:37:43,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792047732] [2023-12-02 14:37:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792047732] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:37:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:37:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 14:37:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775131278] [2023-12-02 14:37:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:37:43,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:37:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:37:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:37:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:37:43,290 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) [2023-12-02 14:37:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:37:43,867 INFO L93 Difference]: Finished difference Result 19764 states and 74104 transitions. [2023-12-02 14:37:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 14:37:43,868 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 [2023-12-02 14:37:43,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:37:43,938 INFO L225 Difference]: With dead ends: 19764 [2023-12-02 14:37:43,938 INFO L226 Difference]: Without dead ends: 19764 [2023-12-02 14:37:43,938 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 [2023-12-02 14:37:43,939 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 185 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 14:37:43,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 134 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 14:37:43,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19764 states. [2023-12-02 14:37:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19764 to 18724. [2023-12-02 14:37:44,394 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) [2023-12-02 14:37:44,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18724 states to 18724 states and 71244 transitions. [2023-12-02 14:37:44,458 INFO L78 Accepts]: Start accepts. Automaton has 18724 states and 71244 transitions. Word has length 13 [2023-12-02 14:37:44,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:37:44,458 INFO L495 AbstractCegarLoop]: Abstraction has 18724 states and 71244 transitions. [2023-12-02 14:37:44,459 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) [2023-12-02 14:37:44,459 INFO L276 IsEmpty]: Start isEmpty. Operand 18724 states and 71244 transitions. [2023-12-02 14:37:44,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 14:37:44,461 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:37:44,461 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2023-12-02 14:37:44,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 14:37:44,461 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)] === [2023-12-02 14:37:44,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:37:44,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1715760760, now seen corresponding path program 1 times [2023-12-02 14:37:44,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:37:44,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314969073] [2023-12-02 14:37:44,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:37:44,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:37:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:44,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-02 14:37:44,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-02 14:37:44,493 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-12-02 14:37:44,494 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-02 14:37:44,494 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (15 of 16 remaining) [2023-12-02 14:37:44,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 16 remaining) [2023-12-02 14:37:44,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 16 remaining) [2023-12-02 14:37:44,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (12 of 16 remaining) [2023-12-02 14:37:44,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 16 remaining) [2023-12-02 14:37:44,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 16 remaining) [2023-12-02 14:37:44,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (9 of 16 remaining) [2023-12-02 14:37:44,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 16 remaining) [2023-12-02 14:37:44,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 16 remaining) [2023-12-02 14:37:44,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 16 remaining) [2023-12-02 14:37:44,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 16 remaining) [2023-12-02 14:37:44,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 16 remaining) [2023-12-02 14:37:44,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 16 remaining) [2023-12-02 14:37:44,496 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 16 remaining) [2023-12-02 14:37:44,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 16 remaining) [2023-12-02 14:37:44,497 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thrErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 16 remaining) [2023-12-02 14:37:44,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 14:37:44,497 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-02 14:37:44,498 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-02 14:37:44,498 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-02 14:37:44,531 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-02 14:37:44,534 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 83 places, 86 transitions, 200 flow [2023-12-02 14:38:07,635 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 694676 states, 693061 states have (on average 5.350195725917343) internal successors, (3708012), 694675 states have internal predecessors, (3708012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:38:07,636 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 14:38:07,637 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;@62764372, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 14:38:07,637 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-12-02 14:38:08,690 INFO L276 IsEmpty]: Start isEmpty. Operand has 694676 states, 693061 states have (on average 5.350195725917343) internal successors, (3708012), 694675 states have internal predecessors, (3708012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:38:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:38:08,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:08,691 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:38:08,691 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-12-02 14:38:08,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 482044, now seen corresponding path program 1 times [2023-12-02 14:38:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973631944] [2023-12-02 14:38:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:08,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:38:08,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:08,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973631944] [2023-12-02 14:38:08,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973631944] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:08,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:08,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:38:08,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438092812] [2023-12-02 14:38:08,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:08,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:38:08,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:08,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:38:08,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:38:09,798 INFO L87 Difference]: Start difference. First operand has 694676 states, 693061 states have (on average 5.350195725917343) internal successors, (3708012), 694675 states have internal predecessors, (3708012), 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) [2023-12-02 14:38:11,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 14:38:16,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:16,193 INFO L93 Difference]: Finished difference Result 321830 states and 1539155 transitions. [2023-12-02 14:38:16,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:38:16,193 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 [2023-12-02 14:38:16,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:18,849 INFO L225 Difference]: With dead ends: 321830 [2023-12-02 14:38:18,849 INFO L226 Difference]: Without dead ends: 321830 [2023-12-02 14:38:18,849 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 [2023-12-02 14:38:18,850 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:18,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 21 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 14:38:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321830 states. [2023-12-02 14:38:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321830 to 321830. [2023-12-02 14:38:30,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321830 states, 321233 states have (on average 4.791397521425258) internal successors, (1539155), 321829 states have internal predecessors, (1539155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:38:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321830 states to 321830 states and 1539155 transitions. [2023-12-02 14:38:32,820 INFO L78 Accepts]: Start accepts. Automaton has 321830 states and 1539155 transitions. Word has length 3 [2023-12-02 14:38:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 321830 states and 1539155 transitions. [2023-12-02 14:38:32,820 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) [2023-12-02 14:38:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 321830 states and 1539155 transitions. [2023-12-02 14:38:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 14:38:32,821 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:32,821 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 14:38:32,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-02 14:38:32,821 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-12-02 14:38:32,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:32,821 INFO L85 PathProgramCache]: Analyzing trace with hash 482045, now seen corresponding path program 1 times [2023-12-02 14:38:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:32,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135694618] [2023-12-02 14:38:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:32,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:38:32,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:32,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135694618] [2023-12-02 14:38:32,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135694618] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:32,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:32,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:38:32,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866997549] [2023-12-02 14:38:32,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:32,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:38:32,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:32,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:38:32,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:38:32,862 INFO L87 Difference]: Start difference. First operand 321830 states and 1539155 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) [2023-12-02 14:38:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:36,247 INFO L93 Difference]: Finished difference Result 267589 states and 1271824 transitions. [2023-12-02 14:38:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:38:36,247 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 [2023-12-02 14:38:36,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:38,421 INFO L225 Difference]: With dead ends: 267589 [2023-12-02 14:38:38,421 INFO L226 Difference]: Without dead ends: 267589 [2023-12-02 14:38:38,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:38:38,422 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:38,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 21 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:38:38,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267589 states. [2023-12-02 14:38:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267589 to 267589. [2023-12-02 14:38:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267589 states, 267333 states have (on average 4.757452316025332) internal successors, (1271824), 267588 states have internal predecessors, (1271824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:38:50,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267589 states to 267589 states and 1271824 transitions. [2023-12-02 14:38:50,451 INFO L78 Accepts]: Start accepts. Automaton has 267589 states and 1271824 transitions. Word has length 3 [2023-12-02 14:38:50,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:38:50,451 INFO L495 AbstractCegarLoop]: Abstraction has 267589 states and 1271824 transitions. [2023-12-02 14:38:50,452 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) [2023-12-02 14:38:50,452 INFO L276 IsEmpty]: Start isEmpty. Operand 267589 states and 1271824 transitions. [2023-12-02 14:38:50,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:38:50,452 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:38:50,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:38:50,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-02 14:38:50,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thrErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-12-02 14:38:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:38:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash 768105401, now seen corresponding path program 1 times [2023-12-02 14:38:50,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:38:50,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482999075] [2023-12-02 14:38:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:38:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:38:50,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:38:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:38:50,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:38:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482999075] [2023-12-02 14:38:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482999075] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:38:50,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:38:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 14:38:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936945505] [2023-12-02 14:38:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:38:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 14:38:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:38:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 14:38:50,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:38:50,507 INFO L87 Difference]: Start difference. First operand 267589 states and 1271824 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) [2023-12-02 14:38:53,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:38:53,421 INFO L93 Difference]: Finished difference Result 203900 states and 968356 transitions. [2023-12-02 14:38:53,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 14:38:53,421 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 [2023-12-02 14:38:53,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 14:38:54,998 INFO L225 Difference]: With dead ends: 203900 [2023-12-02 14:38:54,998 INFO L226 Difference]: Without dead ends: 203900 [2023-12-02 14:38:54,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 14:38:54,999 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 14:38:54,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 14:38:55,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203900 states. [2023-12-02 14:39:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203900 to 203900. [2023-12-02 14:39:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203900 states, 203819 states have (on average 4.751058537231564) internal successors, (968356), 203899 states have internal predecessors, (968356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 14:39:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203900 states to 203900 states and 968356 transitions. [2023-12-02 14:39:03,699 INFO L78 Accepts]: Start accepts. Automaton has 203900 states and 968356 transitions. Word has length 13 [2023-12-02 14:39:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 14:39:03,699 INFO L495 AbstractCegarLoop]: Abstraction has 203900 states and 968356 transitions. [2023-12-02 14:39:03,699 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) [2023-12-02 14:39:03,700 INFO L276 IsEmpty]: Start isEmpty. Operand 203900 states and 968356 transitions. [2023-12-02 14:39:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 14:39:03,700 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 14:39:03,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 14:39:03,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 14:39:03,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thrErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (and 16 more)] === [2023-12-02 14:39:03,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 14:39:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 768105402, now seen corresponding path program 1 times [2023-12-02 14:39:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 14:39:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871998142] [2023-12-02 14:39:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 14:39:03,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 14:39:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 14:39:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 14:39:04,474 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 14:39:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871998142] [2023-12-02 14:39:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871998142] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 14:39:04,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 14:39:04,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 14:39:04,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734139172] [2023-12-02 14:39:04,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 14:39:04,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 14:39:04,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 14:39:04,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 14:39:04,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 14:39:04,480 INFO L87 Difference]: Start difference. First operand 203900 states and 968356 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) [2023-12-02 14:39:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 14:39:08,702 INFO L93 Difference]: Finished difference Result 320412 states and 1521700 transitions. [2023-12-02 14:39:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 14:39:08,703 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 [2023-12-02 14:39:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted.