./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --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 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:40:03,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:40:03,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:40:03,739 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:40:03,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:40:03,741 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:40:03,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:40:03,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:40:03,746 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:40:03,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:40:03,749 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:40:03,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:40:03,751 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:40:03,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:40:03,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:40:03,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:40:03,756 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:40:03,757 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:40:03,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:40:03,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:40:03,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:40:03,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:40:03,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:40:03,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:40:03,779 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:40:03,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:40:03,780 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:40:03,781 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:40:03,782 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:40:03,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:40:03,794 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:40:03,795 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:40:03,796 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:40:03,796 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:40:03,797 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:40:03,798 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:40:03,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:40:03,799 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:40:03,799 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:40:03,800 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:40:03,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:40:03,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 15:40:03,844 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:40:03,845 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:40:03,845 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:40:03,846 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:40:03,847 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:40:03,847 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:40:03,847 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:40:03,848 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:40:03,848 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:40:03,848 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:40:03,849 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:40:03,850 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:40:03,850 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:40:03,850 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:40:03,850 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:40:03,851 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:40:03,851 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:40:03,851 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:40:03,853 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 15:40:03,853 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 15:40:03,853 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:40:03,853 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:40:03,854 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 15:40:03,854 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:40:03,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:40:03,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:40:03,855 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 15:40:03,855 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 15:40:03,856 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 15:40:03,856 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:40:03,856 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 15:40:03,857 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:40:03,857 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:40:03,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:40:03,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:40:03,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:40:03,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:40:03,858 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:40:03,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:40:03,858 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:40:03,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:40:03,860 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:40:03,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93834d0ed7ae29f55a5cf3676a6d16497c83e10891cd8a2ab18e9898a90eaebc [2022-11-23 15:40:04,142 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:40:04,166 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:40:04,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:40:04,170 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:40:04,171 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:40:04,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-11-23 15:40:07,416 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:40:07,767 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:40:07,768 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i [2022-11-23 15:40:07,784 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/data/538d91498/6fa8764509df457b98810893c8755e4c/FLAGa0dd9b967 [2022-11-23 15:40:07,807 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/data/538d91498/6fa8764509df457b98810893c8755e4c [2022-11-23 15:40:07,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:40:07,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:40:07,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:40:07,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:40:07,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:40:07,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:07" (1/1) ... [2022-11-23 15:40:07,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4292db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:07, skipping insertion in model container [2022-11-23 15:40:07,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:40:07" (1/1) ... [2022-11-23 15:40:07,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:40:07,888 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:40:08,270 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-11-23 15:40:08,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:40:08,315 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:40:08,400 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/sv-benchmarks/c/pthread-ext/25_stack_longest-2.i[31043,31056] [2022-11-23 15:40:08,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:40:08,467 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:40:08,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08 WrapperNode [2022-11-23 15:40:08,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:40:08,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:40:08,470 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:40:08,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:40:08,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,561 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2022-11-23 15:40:08,561 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:40:08,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:40:08,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:40:08,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:40:08,575 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,622 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,624 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,642 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:40:08,643 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:40:08,643 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:40:08,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:40:08,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (1/1) ... [2022-11-23 15:40:08,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:40:08,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:40:08,694 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:40:08,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f2a0df16-340e-4f25-8995-6dd48499fe1e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:40:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:40:08,744 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-23 15:40:08,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-23 15:40:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:40:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:40:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:40:08,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:40:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:40:08,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:40:08,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:40:08,748 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:40:09,003 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:40:09,006 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:40:09,589 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:40:09,906 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:40:09,906 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 15:40:09,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:09 BoogieIcfgContainer [2022-11-23 15:40:09,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:40:09,914 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:40:09,914 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:40:09,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:40:09,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:40:07" (1/3) ... [2022-11-23 15:40:09,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4854d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:09, skipping insertion in model container [2022-11-23 15:40:09,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:40:08" (2/3) ... [2022-11-23 15:40:09,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d4854d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:40:09, skipping insertion in model container [2022-11-23 15:40:09,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:40:09" (3/3) ... [2022-11-23 15:40:09,924 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-2.i [2022-11-23 15:40:09,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:40:09,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-23 15:40:09,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:40:10,118 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:40:10,170 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:40:10,196 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-23 15:40:10,199 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-23 15:40:10,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-11-23 15:40:10,263 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-11-23 15:40:10,263 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-23 15:40:10,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-11-23 15:40:10,275 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2022-11-23 15:40:21,463 INFO L134 LiptonReduction]: Checked pairs total: 4752 [2022-11-23 15:40:21,464 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-11-23 15:40:21,473 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 51 places, 52 transitions, 109 flow [2022-11-23 15:40:21,511 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:21,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:40:21,539 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;@15cba760, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:40:21,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2022-11-23 15:40:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:40:21,548 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:21,548 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:40:21,549 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-23 15:40:21,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 31667, now seen corresponding path program 1 times [2022-11-23 15:40:21,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:21,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539327234] [2022-11-23 15:40:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:21,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:21,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:21,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:21,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:21,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539327234] [2022-11-23 15:40:21,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539327234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:21,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:21,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:40:21,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20968756] [2022-11-23 15:40:21,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:21,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:21,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:21,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:21,981 INFO L87 Difference]: Start difference. First operand has 325 states, 163 states have (on average 3.8466257668711656) internal successors, (627), 324 states have internal predecessors, (627), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:22,087 INFO L93 Difference]: Finished difference Result 94 states and 176 transitions. [2022-11-23 15:40:22,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:22,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:40:22,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:22,103 INFO L225 Difference]: With dead ends: 94 [2022-11-23 15:40:22,104 INFO L226 Difference]: Without dead ends: 94 [2022-11-23 15:40:22,105 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 [2022-11-23 15:40:22,112 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:22,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:22,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-23 15:40:22,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-11-23 15:40:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 2.410958904109589) internal successors, (176), 93 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 176 transitions. [2022-11-23 15:40:22,174 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 176 transitions. Word has length 2 [2022-11-23 15:40:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:22,178 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 176 transitions. [2022-11-23 15:40:22,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 176 transitions. [2022-11-23 15:40:22,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:40:22,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:22,180 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:40:22,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:40:22,180 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-23 15:40:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 31668, now seen corresponding path program 1 times [2022-11-23 15:40:22,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:22,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620605133] [2022-11-23 15:40:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:22,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620605133] [2022-11-23 15:40:22,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620605133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:22,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:22,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:40:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812083435] [2022-11-23 15:40:22,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:22,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:22,299 INFO L87 Difference]: Start difference. First operand 94 states and 176 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:22,369 INFO L93 Difference]: Finished difference Result 75 states and 137 transitions. [2022-11-23 15:40:22,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:22,371 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:40:22,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:22,372 INFO L225 Difference]: With dead ends: 75 [2022-11-23 15:40:22,372 INFO L226 Difference]: Without dead ends: 75 [2022-11-23 15:40:22,372 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 [2022-11-23 15:40:22,374 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 24 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:22,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:22,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-23 15:40:22,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-23 15:40:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 74 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 137 transitions. [2022-11-23 15:40:22,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 137 transitions. Word has length 2 [2022-11-23 15:40:22,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:22,384 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 137 transitions. [2022-11-23 15:40:22,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,384 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 137 transitions. [2022-11-23 15:40:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:40:22,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:22,385 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:40:22,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:40:22,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-23 15:40:22,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:22,387 INFO L85 PathProgramCache]: Analyzing trace with hash 30455788, now seen corresponding path program 1 times [2022-11-23 15:40:22,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:22,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020392238] [2022-11-23 15:40:22,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:22,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:22,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020392238] [2022-11-23 15:40:22,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020392238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:22,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:22,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:22,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582745817] [2022-11-23 15:40:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:22,614 INFO L87 Difference]: Start difference. First operand 75 states and 137 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:22,705 INFO L93 Difference]: Finished difference Result 71 states and 130 transitions. [2022-11-23 15:40:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:40:22,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:22,713 INFO L225 Difference]: With dead ends: 71 [2022-11-23 15:40:22,713 INFO L226 Difference]: Without dead ends: 71 [2022-11-23 15:40:22,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:22,719 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:22,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-23 15:40:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-11-23 15:40:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 2.096774193548387) internal successors, (130), 70 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 130 transitions. [2022-11-23 15:40:22,737 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 130 transitions. Word has length 4 [2022-11-23 15:40:22,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:22,738 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 130 transitions. [2022-11-23 15:40:22,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:22,739 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 130 transitions. [2022-11-23 15:40:22,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:40:22,739 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:22,740 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:40:22,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:40:22,744 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-23 15:40:22,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:22,747 INFO L85 PathProgramCache]: Analyzing trace with hash 30455789, now seen corresponding path program 1 times [2022-11-23 15:40:22,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:22,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505444573] [2022-11-23 15:40:22,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:22,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:22,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505444573] [2022-11-23 15:40:22,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505444573] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:22,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:22,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265416624] [2022-11-23 15:40:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:22,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:22,980 INFO L87 Difference]: Start difference. First operand 71 states and 130 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:23,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:23,038 INFO L93 Difference]: Finished difference Result 67 states and 123 transitions. [2022-11-23 15:40:23,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:23,038 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:40:23,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:23,041 INFO L225 Difference]: With dead ends: 67 [2022-11-23 15:40:23,041 INFO L226 Difference]: Without dead ends: 67 [2022-11-23 15:40:23,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:23,046 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:23,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 1 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-23 15:40:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-11-23 15:40:23,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 66 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 123 transitions. [2022-11-23 15:40:23,066 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 123 transitions. Word has length 4 [2022-11-23 15:40:23,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:23,067 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 123 transitions. [2022-11-23 15:40:23,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 123 transitions. [2022-11-23 15:40:23,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 15:40:23,067 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:23,068 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-23 15:40:23,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:40:23,068 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-23 15:40:23,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:23,069 INFO L85 PathProgramCache]: Analyzing trace with hash -796727777, now seen corresponding path program 1 times [2022-11-23 15:40:23,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:23,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926164446] [2022-11-23 15:40:23,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:23,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:40:23,095 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:40:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:40:23,138 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:40:23,139 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:40:23,141 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2022-11-23 15:40:23,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2022-11-23 15:40:23,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2022-11-23 15:40:23,145 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2022-11-23 15:40:23,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2022-11-23 15:40:23,146 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2022-11-23 15:40:23,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2022-11-23 15:40:23,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2022-11-23 15:40:23,151 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2022-11-23 15:40:23,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2022-11-23 15:40:23,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2022-11-23 15:40:23,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2022-11-23 15:40:23,152 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2022-11-23 15:40:23,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2022-11-23 15:40:23,153 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2022-11-23 15:40:23,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2022-11-23 15:40:23,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2022-11-23 15:40:23,154 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2022-11-23 15:40:23,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2022-11-23 15:40:23,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2022-11-23 15:40:23,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2022-11-23 15:40:23,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2022-11-23 15:40:23,155 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2022-11-23 15:40:23,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2022-11-23 15:40:23,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2022-11-23 15:40:23,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2022-11-23 15:40:23,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (39 of 66 remaining) [2022-11-23 15:40:23,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (38 of 66 remaining) [2022-11-23 15:40:23,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2022-11-23 15:40:23,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2022-11-23 15:40:23,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2022-11-23 15:40:23,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2022-11-23 15:40:23,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (33 of 66 remaining) [2022-11-23 15:40:23,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2022-11-23 15:40:23,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 66 remaining) [2022-11-23 15:40:23,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2022-11-23 15:40:23,158 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2022-11-23 15:40:23,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2022-11-23 15:40:23,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2022-11-23 15:40:23,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2022-11-23 15:40:23,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2022-11-23 15:40:23,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2022-11-23 15:40:23,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2022-11-23 15:40:23,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2022-11-23 15:40:23,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2022-11-23 15:40:23,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2022-11-23 15:40:23,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2022-11-23 15:40:23,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2022-11-23 15:40:23,161 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2022-11-23 15:40:23,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2022-11-23 15:40:23,162 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2022-11-23 15:40:23,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2022-11-23 15:40:23,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2022-11-23 15:40:23,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2022-11-23 15:40:23,163 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2022-11-23 15:40:23,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2022-11-23 15:40:23,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2022-11-23 15:40:23,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2022-11-23 15:40:23,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2022-11-23 15:40:23,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2022-11-23 15:40:23,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 66 remaining) [2022-11-23 15:40:23,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 66 remaining) [2022-11-23 15:40:23,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2022-11-23 15:40:23,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2022-11-23 15:40:23,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2022-11-23 15:40:23,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2022-11-23 15:40:23,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:40:23,171 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-23 15:40:23,174 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:40:23,175 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-23 15:40:23,281 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:40:23,291 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:40:23,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-23 15:40:23,292 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-23 15:40:23,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-11-23 15:40:23,409 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-11-23 15:40:23,409 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-23 15:40:23,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-11-23 15:40:23,431 INFO L119 LiptonReduction]: Number of co-enabled transitions 27800 [2022-11-23 15:40:37,870 INFO L134 LiptonReduction]: Checked pairs total: 72450 [2022-11-23 15:40:37,870 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-11-23 15:40:37,874 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 115 places, 120 transitions, 252 flow [2022-11-23 15:40:38,701 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:38,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:40:38,711 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;@15cba760, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:40:38,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2022-11-23 15:40:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:38,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:40:38,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:38,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:40:38,771 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:38,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 52783, now seen corresponding path program 1 times [2022-11-23 15:40:38,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:38,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269245768] [2022-11-23 15:40:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:38,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:38,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269245768] [2022-11-23 15:40:38,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269245768] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:38,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:38,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:40:38,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529104530] [2022-11-23 15:40:38,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:38,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:38,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:38,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:38,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:38,890 INFO L87 Difference]: Start difference. First operand has 23354 states, 18105 states have (on average 3.9086440209886772) internal successors, (70766), 23353 states have internal predecessors, (70766), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:39,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:39,299 INFO L93 Difference]: Finished difference Result 8176 states and 24337 transitions. [2022-11-23 15:40:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:39,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:40:39,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:39,462 INFO L225 Difference]: With dead ends: 8176 [2022-11-23 15:40:39,462 INFO L226 Difference]: Without dead ends: 8176 [2022-11-23 15:40:39,463 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 [2022-11-23 15:40:39,464 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 86 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:39,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 15 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:40:39,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2022-11-23 15:40:39,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 8176. [2022-11-23 15:40:39,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 7509 states have (on average 3.2410440804368092) internal successors, (24337), 8175 states have internal predecessors, (24337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 24337 transitions. [2022-11-23 15:40:39,856 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 24337 transitions. Word has length 2 [2022-11-23 15:40:39,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:39,856 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 24337 transitions. [2022-11-23 15:40:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:39,857 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 24337 transitions. [2022-11-23 15:40:39,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:40:39,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:39,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:40:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:40:39,860 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:39,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash 52785, now seen corresponding path program 1 times [2022-11-23 15:40:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673605372] [2022-11-23 15:40:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:39,938 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673605372] [2022-11-23 15:40:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673605372] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:39,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:39,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:40:39,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425471542] [2022-11-23 15:40:39,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:39,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:39,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:39,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:39,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:39,940 INFO L87 Difference]: Start difference. First operand 8176 states and 24337 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:40,149 INFO L93 Difference]: Finished difference Result 6807 states and 20046 transitions. [2022-11-23 15:40:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:40,150 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2022-11-23 15:40:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:40,219 INFO L225 Difference]: With dead ends: 6807 [2022-11-23 15:40:40,220 INFO L226 Difference]: Without dead ends: 6807 [2022-11-23 15:40:40,220 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 [2022-11-23 15:40:40,221 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 85 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:40,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:40,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6807 states. [2022-11-23 15:40:40,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6807 to 6807. [2022-11-23 15:40:40,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6807 states, 6483 states have (on average 3.092086996760759) internal successors, (20046), 6806 states have internal predecessors, (20046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:40,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6807 states to 6807 states and 20046 transitions. [2022-11-23 15:40:40,582 INFO L78 Accepts]: Start accepts. Automaton has 6807 states and 20046 transitions. Word has length 2 [2022-11-23 15:40:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:40,582 INFO L495 AbstractCegarLoop]: Abstraction has 6807 states and 20046 transitions. [2022-11-23 15:40:40,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 6807 states and 20046 transitions. [2022-11-23 15:40:40,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:40:40,583 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:40,584 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:40:40,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:40:40,584 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:40,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:40,585 INFO L85 PathProgramCache]: Analyzing trace with hash 50767644, now seen corresponding path program 1 times [2022-11-23 15:40:40,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:40,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804181446] [2022-11-23 15:40:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:40,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:40,753 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804181446] [2022-11-23 15:40:40,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804181446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:40,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:40,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:40,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477546626] [2022-11-23 15:40:40,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:40,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:40,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:40,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:40,756 INFO L87 Difference]: Start difference. First operand 6807 states and 20046 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:40,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:40,978 INFO L93 Difference]: Finished difference Result 6089 states and 17982 transitions. [2022-11-23 15:40:40,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:40,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:40:40,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:41,016 INFO L225 Difference]: With dead ends: 6089 [2022-11-23 15:40:41,016 INFO L226 Difference]: Without dead ends: 6089 [2022-11-23 15:40:41,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:41,018 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:41,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 15 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2022-11-23 15:40:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 6089. [2022-11-23 15:40:41,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6089 states, 5833 states have (on average 3.082804731698954) internal successors, (17982), 6088 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6089 states to 6089 states and 17982 transitions. [2022-11-23 15:40:41,379 INFO L78 Accepts]: Start accepts. Automaton has 6089 states and 17982 transitions. Word has length 4 [2022-11-23 15:40:41,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:41,379 INFO L495 AbstractCegarLoop]: Abstraction has 6089 states and 17982 transitions. [2022-11-23 15:40:41,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 6089 states and 17982 transitions. [2022-11-23 15:40:41,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 15:40:41,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:41,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 15:40:41,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:40:41,381 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:41,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:41,382 INFO L85 PathProgramCache]: Analyzing trace with hash 50767643, now seen corresponding path program 1 times [2022-11-23 15:40:41,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:41,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137128411] [2022-11-23 15:40:41,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:41,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:41,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:41,487 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:41,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137128411] [2022-11-23 15:40:41,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137128411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:41,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:41,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:41,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165077668] [2022-11-23 15:40:41,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:41,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:41,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:41,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:41,489 INFO L87 Difference]: Start difference. First operand 6089 states and 17982 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:41,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:41,676 INFO L93 Difference]: Finished difference Result 5411 states and 16030 transitions. [2022-11-23 15:40:41,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:41,677 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 15:40:41,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:41,703 INFO L225 Difference]: With dead ends: 5411 [2022-11-23 15:40:41,703 INFO L226 Difference]: Without dead ends: 5411 [2022-11-23 15:40:41,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:41,705 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 152 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:41,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 15 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:41,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2022-11-23 15:40:41,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 5411. [2022-11-23 15:40:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5411 states, 5215 states have (on average 3.0738255033557045) internal successors, (16030), 5410 states have internal predecessors, (16030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5411 states to 5411 states and 16030 transitions. [2022-11-23 15:40:41,948 INFO L78 Accepts]: Start accepts. Automaton has 5411 states and 16030 transitions. Word has length 4 [2022-11-23 15:40:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:41,948 INFO L495 AbstractCegarLoop]: Abstraction has 5411 states and 16030 transitions. [2022-11-23 15:40:41,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:41,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5411 states and 16030 transitions. [2022-11-23 15:40:41,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 15:40:41,950 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:41,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:41,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:40:41,950 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:41,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:41,951 INFO L85 PathProgramCache]: Analyzing trace with hash 591950679, now seen corresponding path program 1 times [2022-11-23 15:40:41,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:41,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481778777] [2022-11-23 15:40:41,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:41,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:41,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:41,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:41,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481778777] [2022-11-23 15:40:42,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481778777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:42,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:42,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:42,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273037613] [2022-11-23 15:40:42,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:42,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:40:42,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:42,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:40:42,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:42,002 INFO L87 Difference]: Start difference. First operand 5411 states and 16030 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:42,273 INFO L93 Difference]: Finished difference Result 6241 states and 18385 transitions. [2022-11-23 15:40:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 15:40:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:42,304 INFO L225 Difference]: With dead ends: 6241 [2022-11-23 15:40:42,305 INFO L226 Difference]: Without dead ends: 6241 [2022-11-23 15:40:42,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:40:42,306 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:42,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 29 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:40:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6241 states. [2022-11-23 15:40:42,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6241 to 5681. [2022-11-23 15:40:42,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5681 states, 5471 states have (on average 3.0665326265764943) internal successors, (16777), 5680 states have internal predecessors, (16777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:42,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5681 states to 5681 states and 16777 transitions. [2022-11-23 15:40:42,558 INFO L78 Accepts]: Start accepts. Automaton has 5681 states and 16777 transitions. Word has length 7 [2022-11-23 15:40:42,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:42,558 INFO L495 AbstractCegarLoop]: Abstraction has 5681 states and 16777 transitions. [2022-11-23 15:40:42,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:42,558 INFO L276 IsEmpty]: Start isEmpty. Operand 5681 states and 16777 transitions. [2022-11-23 15:40:42,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:40:42,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:42,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:42,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:40:42,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:42,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash -744715311, now seen corresponding path program 1 times [2022-11-23 15:40:42,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:42,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306831512] [2022-11-23 15:40:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:42,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:42,690 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:42,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306831512] [2022-11-23 15:40:42,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306831512] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:42,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:42,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068057063] [2022-11-23 15:40:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:42,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:42,692 INFO L87 Difference]: Start difference. First operand 5681 states and 16777 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:42,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:42,843 INFO L93 Difference]: Finished difference Result 4111 states and 12247 transitions. [2022-11-23 15:40:42,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:42,844 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:40:42,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:42,862 INFO L225 Difference]: With dead ends: 4111 [2022-11-23 15:40:42,862 INFO L226 Difference]: Without dead ends: 4111 [2022-11-23 15:40:42,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:40:42,863 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 127 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:42,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 15 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4111 states. [2022-11-23 15:40:42,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4111 to 4111. [2022-11-23 15:40:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4111 states, 4021 states have (on average 3.0457597612534197) internal successors, (12247), 4110 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 12247 transitions. [2022-11-23 15:40:43,078 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 12247 transitions. Word has length 9 [2022-11-23 15:40:43,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:43,078 INFO L495 AbstractCegarLoop]: Abstraction has 4111 states and 12247 transitions. [2022-11-23 15:40:43,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 12247 transitions. [2022-11-23 15:40:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:40:43,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:43,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:43,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 15:40:43,081 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:43,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash -744715309, now seen corresponding path program 1 times [2022-11-23 15:40:43,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:43,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577654171] [2022-11-23 15:40:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:40:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:40:43,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:40:43,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577654171] [2022-11-23 15:40:43,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577654171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:40:43,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:40:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 15:40:43,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674288716] [2022-11-23 15:40:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:40:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:40:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:40:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:40:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:43,254 INFO L87 Difference]: Start difference. First operand 4111 states and 12247 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:40:43,374 INFO L93 Difference]: Finished difference Result 2791 states and 8417 transitions. [2022-11-23 15:40:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:40:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:40:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:40:43,389 INFO L225 Difference]: With dead ends: 2791 [2022-11-23 15:40:43,389 INFO L226 Difference]: Without dead ends: 2791 [2022-11-23 15:40:43,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:40:43,391 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:40:43,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 15 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:40:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2022-11-23 15:40:43,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2791. [2022-11-23 15:40:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2791 states, 2771 states have (on average 3.037531577047997) internal successors, (8417), 2790 states have internal predecessors, (8417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:43,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2791 states to 2791 states and 8417 transitions. [2022-11-23 15:40:43,498 INFO L78 Accepts]: Start accepts. Automaton has 2791 states and 8417 transitions. Word has length 9 [2022-11-23 15:40:43,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:40:43,499 INFO L495 AbstractCegarLoop]: Abstraction has 2791 states and 8417 transitions. [2022-11-23 15:40:43,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:40:43,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2791 states and 8417 transitions. [2022-11-23 15:40:43,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:40:43,500 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:40:43,501 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-23 15:40:43,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 15:40:43,501 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-23 15:40:43,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:40:43,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1268790838, now seen corresponding path program 1 times [2022-11-23 15:40:43,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:40:43,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146777164] [2022-11-23 15:40:43,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:40:43,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:40:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:40:43,515 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:40:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:40:43,529 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:40:43,529 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:40:43,530 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2022-11-23 15:40:43,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2022-11-23 15:40:43,530 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2022-11-23 15:40:43,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2022-11-23 15:40:43,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2022-11-23 15:40:43,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2022-11-23 15:40:43,531 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2022-11-23 15:40:43,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2022-11-23 15:40:43,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2022-11-23 15:40:43,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2022-11-23 15:40:43,532 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2022-11-23 15:40:43,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2022-11-23 15:40:43,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2022-11-23 15:40:43,533 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2022-11-23 15:40:43,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2022-11-23 15:40:43,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2022-11-23 15:40:43,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2022-11-23 15:40:43,534 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2022-11-23 15:40:43,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2022-11-23 15:40:43,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2022-11-23 15:40:43,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2022-11-23 15:40:43,535 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2022-11-23 15:40:43,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2022-11-23 15:40:43,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2022-11-23 15:40:43,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2022-11-23 15:40:43,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2022-11-23 15:40:43,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (70 of 97 remaining) [2022-11-23 15:40:43,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (69 of 97 remaining) [2022-11-23 15:40:43,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2022-11-23 15:40:43,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2022-11-23 15:40:43,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2022-11-23 15:40:43,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2022-11-23 15:40:43,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (64 of 97 remaining) [2022-11-23 15:40:43,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2022-11-23 15:40:43,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 97 remaining) [2022-11-23 15:40:43,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2022-11-23 15:40:43,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2022-11-23 15:40:43,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2022-11-23 15:40:43,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2022-11-23 15:40:43,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2022-11-23 15:40:43,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2022-11-23 15:40:43,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2022-11-23 15:40:43,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2022-11-23 15:40:43,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2022-11-23 15:40:43,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2022-11-23 15:40:43,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2022-11-23 15:40:43,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2022-11-23 15:40:43,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2022-11-23 15:40:43,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2022-11-23 15:40:43,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2022-11-23 15:40:43,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2022-11-23 15:40:43,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2022-11-23 15:40:43,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2022-11-23 15:40:43,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2022-11-23 15:40:43,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2022-11-23 15:40:43,544 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2022-11-23 15:40:43,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2022-11-23 15:40:43,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2022-11-23 15:40:43,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2022-11-23 15:40:43,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2022-11-23 15:40:43,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 97 remaining) [2022-11-23 15:40:43,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 97 remaining) [2022-11-23 15:40:43,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2022-11-23 15:40:43,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2022-11-23 15:40:43,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2022-11-23 15:40:43,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2022-11-23 15:40:43,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2022-11-23 15:40:43,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2022-11-23 15:40:43,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2022-11-23 15:40:43,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2022-11-23 15:40:43,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2022-11-23 15:40:43,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2022-11-23 15:40:43,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2022-11-23 15:40:43,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2022-11-23 15:40:43,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2022-11-23 15:40:43,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2022-11-23 15:40:43,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2022-11-23 15:40:43,550 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2022-11-23 15:40:43,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2022-11-23 15:40:43,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2022-11-23 15:40:43,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2022-11-23 15:40:43,551 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2022-11-23 15:40:43,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2022-11-23 15:40:43,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2022-11-23 15:40:43,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2022-11-23 15:40:43,552 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2022-11-23 15:40:43,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2022-11-23 15:40:43,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2022-11-23 15:40:43,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2022-11-23 15:40:43,553 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2022-11-23 15:40:43,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2022-11-23 15:40:43,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 97 remaining) [2022-11-23 15:40:43,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 97 remaining) [2022-11-23 15:40:43,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2022-11-23 15:40:43,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2022-11-23 15:40:43,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2022-11-23 15:40:43,555 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2022-11-23 15:40:43,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 15:40:43,556 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:40:43,557 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-23 15:40:43,557 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-23 15:40:43,659 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-23 15:40:43,664 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:40:43,664 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-23 15:40:43,665 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-23 15:40:43,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-11-23 15:40:43,807 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-11-23 15:40:43,807 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-23 15:40:43,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1437 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-11-23 15:40:43,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 72000 [2022-11-23 15:41:03,719 INFO L134 LiptonReduction]: Checked pairs total: 194864 [2022-11-23 15:41:03,720 INFO L136 LiptonReduction]: Total number of compositions: 427 [2022-11-23 15:41:03,721 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 168 places, 176 transitions, 373 flow [2022-11-23 15:41:38,269 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:38,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:41:38,284 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;@15cba760, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:41:38,284 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2022-11-23 15:41:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:41:39,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 15:41:39,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:41:39,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 15:41:39,728 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-11-23 15:41:39,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:41:39,731 INFO L85 PathProgramCache]: Analyzing trace with hash 80664, now seen corresponding path program 1 times [2022-11-23 15:41:39,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:41:39,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469095554] [2022-11-23 15:41:39,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:41:39,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:41:39,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:41:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:41:39,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:41:39,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469095554] [2022-11-23 15:41:39,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469095554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:41:39,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:41:39,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 15:41:39,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451253939] [2022-11-23 15:41:39,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:41:39,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 15:41:39,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:41:39,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 15:41:39,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 15:41:47,776 INFO L87 Difference]: Start difference. First operand has 1191669 states, 1023605 states have (on average 4.782619272082493) internal successors, (4895513), 1191668 states have internal predecessors, (4895513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)