./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh --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 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb --- 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-2329fc7 [2022-12-14 09:04:50,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:04:50,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:04:50,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:04:50,899 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:04:50,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:04:50,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:04:50,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:04:50,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:04:50,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:04:50,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:04:50,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:04:50,908 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:04:50,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:04:50,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:04:50,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:04:50,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:04:50,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:04:50,914 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:04:50,916 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:04:50,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:04:50,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:04:50,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:04:50,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:04:50,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:04:50,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:04:50,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:04:50,926 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:04:50,927 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:04:50,928 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:04:50,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:04:50,928 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:04:50,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:04:50,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:04:50,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:04:50,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:04:50,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:04:50,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:04:50,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:04:50,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:04:50,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:04:50,934 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-12-14 09:04:50,956 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:04:50,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:04:50,956 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:04:50,956 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:04:50,957 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:04:50,957 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:04:50,957 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:04:50,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:04:50,958 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:04:50,959 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:04:50,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:04:50,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:04:50,959 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:04:50,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-14 09:04:50,960 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-14 09:04:50,960 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:04:50,960 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:04:50,960 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 09:04:50,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-14 09:04:50,961 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:04:50,962 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-14 09:04:50,962 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:04:50,962 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:04:50,962 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:04:50,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:04:50,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:04:50,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:04:50,963 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:04:50,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:04:50,963 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:04:50,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:04:50,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:04:50,964 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_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 57b20b3268fa30a07af1365aac59c96531ad2ebea6861c18a1d5dfea8339adbb [2022-12-14 09:04:51,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:04:51,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:04:51,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:04:51,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:04:51,179 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:04:51,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2022-12-14 09:04:53,788 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:04:53,950 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:04:53,950 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2022-12-14 09:04:53,958 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/data/281556eff/df174e822de14dc5ae01b044de84e210/FLAGf4a26b6d3 [2022-12-14 09:04:54,350 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/data/281556eff/df174e822de14dc5ae01b044de84e210 [2022-12-14 09:04:54,352 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:04:54,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:04:54,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:04:54,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:04:54,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:04:54,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c57dcb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54, skipping insertion in model container [2022-12-14 09:04:54,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,363 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:04:54,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:04:54,551 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_f153dd31-559a-42c1-a07f-237e54888907/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2022-12-14 09:04:54,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:04:54,571 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:04:54,616 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_f153dd31-559a-42c1-a07f-237e54888907/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c[6501,6514] [2022-12-14 09:04:54,620 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:04:54,635 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:04:54,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54 WrapperNode [2022-12-14 09:04:54,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:04:54,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:04:54,637 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:04:54,637 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:04:54,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,681 INFO L138 Inliner]: procedures = 26, calls = 76, calls flagged for inlining = 28, calls inlined = 42, statements flattened = 574 [2022-12-14 09:04:54,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:04:54,681 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:04:54,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:04:54,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:04:54,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,708 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,710 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,711 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:04:54,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:04:54,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:04:54,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:04:54,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (1/1) ... [2022-12-14 09:04:54,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:04:54,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:04:54,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:04:54,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:04:54,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:04:54,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:04:54,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:04:54,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:04:54,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 09:04:54,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 09:04:54,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-12-14 09:04:54,774 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-12-14 09:04:54,774 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-12-14 09:04:54,775 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-12-14 09:04:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:04:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 09:04:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:04:54,775 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:04:54,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:04:54,777 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 09:04:54,889 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:04:54,890 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:04:55,556 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:04:55,567 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:04:55,567 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-14 09:04:55,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:04:55 BoogieIcfgContainer [2022-12-14 09:04:55,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:04:55,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:04:55,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:04:55,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:04:55,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:04:54" (1/3) ... [2022-12-14 09:04:55,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c7f456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:04:55, skipping insertion in model container [2022-12-14 09:04:55,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:04:54" (2/3) ... [2022-12-14 09:04:55,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48c7f456 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:04:55, skipping insertion in model container [2022-12-14 09:04:55,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:04:55" (3/3) ... [2022-12-14 09:04:55,576 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2022-12-14 09:04:55,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:04:55,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 68 error locations. [2022-12-14 09:04:55,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 09:04:55,704 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-14 09:04:55,734 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 09:04:55,745 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 768 places, 831 transitions, 1686 flow [2022-12-14 09:04:55,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 768 places, 831 transitions, 1686 flow [2022-12-14 09:04:55,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 768 places, 831 transitions, 1686 flow [2022-12-14 09:04:56,003 INFO L130 PetriNetUnfolder]: 73/828 cut-off events. [2022-12-14 09:04:56,003 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-14 09:04:56,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 841 conditions, 828 events. 73/828 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3195 event pairs, 0 based on Foata normal form. 0/687 useless extension candidates. Maximal degree in co-relation 604. Up to 2 conditions per place. [2022-12-14 09:04:56,066 INFO L119 LiptonReduction]: Number of co-enabled transitions 230010 [2022-12-14 09:05:29,487 INFO L134 LiptonReduction]: Checked pairs total: 239398 [2022-12-14 09:05:29,488 INFO L136 LiptonReduction]: Total number of compositions: 1072 [2022-12-14 09:05:29,496 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 117 places, 122 transitions, 268 flow [2022-12-14 09:05:30,837 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:30,851 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:05:30,855 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;@7de0c786, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:05:30,855 INFO L358 AbstractCegarLoop]: Starting to check reachability of 119 error locations. [2022-12-14 09:05:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:30,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:05:30,921 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:30,921 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:05:30,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:30,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:30,926 INFO L85 PathProgramCache]: Analyzing trace with hash 115380, now seen corresponding path program 1 times [2022-12-14 09:05:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:30,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877355446] [2022-12-14 09:05:30,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:30,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:31,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:31,121 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877355446] [2022-12-14 09:05:31,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877355446] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:31,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:31,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:05:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101792292] [2022-12-14 09:05:31,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:31,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:05:31,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:31,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:05:31,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:05:31,195 INFO L87 Difference]: Start difference. First operand has 56252 states, 40280 states have (on average 5.631852035749752) internal successors, (226851), 56251 states have internal predecessors, (226851), 0 states have call successors, (0), 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) [2022-12-14 09:05:31,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:31,718 INFO L93 Difference]: Finished difference Result 24048 states and 97787 transitions. [2022-12-14 09:05:31,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:31,720 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 [2022-12-14 09:05:31,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:32,010 INFO L225 Difference]: With dead ends: 24048 [2022-12-14 09:05:32,010 INFO L226 Difference]: Without dead ends: 24048 [2022-12-14 09:05:32,011 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 [2022-12-14 09:05:32,013 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:32,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:05:32,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24048 states. [2022-12-14 09:05:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24048 to 24048. [2022-12-14 09:05:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24048 states, 18614 states have (on average 5.25341141076609) internal successors, (97787), 24047 states have internal predecessors, (97787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24048 states to 24048 states and 97787 transitions. [2022-12-14 09:05:32,956 INFO L78 Accepts]: Start accepts. Automaton has 24048 states and 97787 transitions. Word has length 2 [2022-12-14 09:05:32,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:32,957 INFO L495 AbstractCegarLoop]: Abstraction has 24048 states and 97787 transitions. [2022-12-14 09:05:32,957 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) [2022-12-14 09:05:32,957 INFO L276 IsEmpty]: Start isEmpty. Operand 24048 states and 97787 transitions. [2022-12-14 09:05:32,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-12-14 09:05:32,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:32,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-12-14 09:05:32,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:05:32,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:32,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:32,958 INFO L85 PathProgramCache]: Analyzing trace with hash 115381, now seen corresponding path program 1 times [2022-12-14 09:05:32,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:32,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039646839] [2022-12-14 09:05:32,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:32,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:33,120 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:33,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039646839] [2022-12-14 09:05:33,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039646839] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:33,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:33,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-14 09:05:33,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399819210] [2022-12-14 09:05:33,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:33,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:05:33,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:33,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:05:33,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:05:33,123 INFO L87 Difference]: Start difference. First operand 24048 states and 97787 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) [2022-12-14 09:05:33,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:33,646 INFO L93 Difference]: Finished difference Result 24051 states and 97790 transitions. [2022-12-14 09:05:33,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:33,646 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 [2022-12-14 09:05:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:33,768 INFO L225 Difference]: With dead ends: 24051 [2022-12-14 09:05:33,768 INFO L226 Difference]: Without dead ends: 24051 [2022-12-14 09:05:33,768 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 [2022-12-14 09:05:33,769 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:33,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:05:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24051 states. [2022-12-14 09:05:34,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24051 to 24051. [2022-12-14 09:05:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24051 states, 18617 states have (on average 5.252726003115432) internal successors, (97790), 24050 states have internal predecessors, (97790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24051 states to 24051 states and 97790 transitions. [2022-12-14 09:05:34,599 INFO L78 Accepts]: Start accepts. Automaton has 24051 states and 97790 transitions. Word has length 2 [2022-12-14 09:05:34,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:34,599 INFO L495 AbstractCegarLoop]: Abstraction has 24051 states and 97790 transitions. [2022-12-14 09:05:34,599 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) [2022-12-14 09:05:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 24051 states and 97790 transitions. [2022-12-14 09:05:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-12-14 09:05:34,600 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:34,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-12-14 09:05:34,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 09:05:34,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:34,601 INFO L85 PathProgramCache]: Analyzing trace with hash 3599967, now seen corresponding path program 1 times [2022-12-14 09:05:34,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:34,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107671282] [2022-12-14 09:05:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:34,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:34,743 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107671282] [2022-12-14 09:05:34,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107671282] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:34,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968886685] [2022-12-14 09:05:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:34,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:34,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:34,745 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:34,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:05:34,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:05:34,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:34,923 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:05:34,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:05:34,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:34,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:34,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968886685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:34,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [796943563] [2022-12-14 09:05:35,007 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:05:35,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:35,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-14 09:05:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86266296] [2022-12-14 09:05:35,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:35,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:05:35,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:05:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:05:35,010 INFO L87 Difference]: Start difference. First operand 24051 states and 97790 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-12-14 09:05:36,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:36,217 INFO L93 Difference]: Finished difference Result 72142 states and 293359 transitions. [2022-12-14 09:05:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:05:36,217 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 3 [2022-12-14 09:05:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:36,574 INFO L225 Difference]: With dead ends: 72142 [2022-12-14 09:05:36,574 INFO L226 Difference]: Without dead ends: 72142 [2022-12-14 09:05:36,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:05:36,575 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 273 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:36,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 0 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:05:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72142 states. [2022-12-14 09:05:37,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72142 to 24060. [2022-12-14 09:05:37,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 18626 states have (on average 5.251207988832815) internal successors, (97809), 24059 states have internal predecessors, (97809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:37,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 97809 transitions. [2022-12-14 09:05:37,569 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 97809 transitions. Word has length 3 [2022-12-14 09:05:37,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:37,570 INFO L495 AbstractCegarLoop]: Abstraction has 24060 states and 97809 transitions. [2022-12-14 09:05:37,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-12-14 09:05:37,570 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 97809 transitions. [2022-12-14 09:05:37,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 09:05:37,570 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:37,570 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2022-12-14 09:05:37,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:05:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:37,772 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:37,876 INFO L85 PathProgramCache]: Analyzing trace with hash -104571595, now seen corresponding path program 2 times [2022-12-14 09:05:37,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:37,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410036601] [2022-12-14 09:05:37,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:37,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:37,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 09:05:38,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410036601] [2022-12-14 09:05:38,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410036601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:38,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744122180] [2022-12-14 09:05:38,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:05:38,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:38,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:38,170 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:38,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:05:38,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:05:38,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-14 09:05:38,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:38,324 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:05:38,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:05:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:38,393 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:05:38,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744122180] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:38,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:05:38,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2022-12-14 09:05:38,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394398783] [2022-12-14 09:05:38,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:38,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:05:38,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:38,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:05:38,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:05:38,396 INFO L87 Difference]: Start difference. First operand 24060 states and 97809 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) [2022-12-14 09:05:38,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:38,757 INFO L93 Difference]: Finished difference Result 24057 states and 97806 transitions. [2022-12-14 09:05:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:05:38,758 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 6 [2022-12-14 09:05:38,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:38,884 INFO L225 Difference]: With dead ends: 24057 [2022-12-14 09:05:38,884 INFO L226 Difference]: Without dead ends: 24057 [2022-12-14 09:05:38,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:05:38,885 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:38,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:05:38,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24057 states. [2022-12-14 09:05:39,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24057 to 24051. [2022-12-14 09:05:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24051 states, 18620 states have (on average 5.2518796992481205) internal successors, (97790), 24050 states have internal predecessors, (97790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:39,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24051 states to 24051 states and 97790 transitions. [2022-12-14 09:05:39,697 INFO L78 Accepts]: Start accepts. Automaton has 24051 states and 97790 transitions. Word has length 6 [2022-12-14 09:05:39,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:39,697 INFO L495 AbstractCegarLoop]: Abstraction has 24051 states and 97790 transitions. [2022-12-14 09:05:39,698 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) [2022-12-14 09:05:39,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24051 states and 97790 transitions. [2022-12-14 09:05:39,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:05:39,698 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:39,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2022-12-14 09:05:39,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:05:39,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:39,900 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:39,901 INFO L85 PathProgramCache]: Analyzing trace with hash 822095174, now seen corresponding path program 1 times [2022-12-14 09:05:39,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:39,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613358179] [2022-12-14 09:05:39,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:40,015 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613358179] [2022-12-14 09:05:40,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613358179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:40,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627732996] [2022-12-14 09:05:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:40,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:40,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:40,016 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:40,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:05:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:40,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:05:40,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:40,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:40,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-12-14 09:05:40,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627732996] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:40,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [47731973] [2022-12-14 09:05:40,184 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Construction of path programs is not yet supported for concurrent programs at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:243) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:05:40,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:40,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-12-14 09:05:40,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739907637] [2022-12-14 09:05:40,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:40,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:05:40,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:40,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:05:40,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:05:40,185 INFO L87 Difference]: Start difference. First operand 24051 states and 97790 transitions. Second operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:40,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:40,609 INFO L93 Difference]: Finished difference Result 24060 states and 97799 transitions. [2022-12-14 09:05:40,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:05:40,609 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 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 10 [2022-12-14 09:05:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:40,706 INFO L225 Difference]: With dead ends: 24060 [2022-12-14 09:05:40,706 INFO L226 Difference]: Without dead ends: 24060 [2022-12-14 09:05:40,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=58, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:05:40,707 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:40,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:05:40,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24060 states. [2022-12-14 09:05:41,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24060 to 24060. [2022-12-14 09:05:41,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24060 states, 18629 states have (on average 5.249825540823447) internal successors, (97799), 24059 states have internal predecessors, (97799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24060 states to 24060 states and 97799 transitions. [2022-12-14 09:05:41,251 INFO L78 Accepts]: Start accepts. Automaton has 24060 states and 97799 transitions. Word has length 10 [2022-12-14 09:05:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:41,251 INFO L495 AbstractCegarLoop]: Abstraction has 24060 states and 97799 transitions. [2022-12-14 09:05:41,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 24060 states and 97799 transitions. [2022-12-14 09:05:41,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:05:41,251 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:41,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-12-14 09:05:41,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-12-14 09:05:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:41,453 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -173770153, now seen corresponding path program 2 times [2022-12-14 09:05:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:41,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515733737] [2022-12-14 09:05:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:41,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:41,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:05:42,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515733737] [2022-12-14 09:05:42,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515733737] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:42,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115236189] [2022-12-14 09:05:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:05:42,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:42,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:42,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:05:42,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:05:42,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:05:42,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:05:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:42,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,188 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-12-14 09:05:42,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 29 [2022-12-14 09:05:42,203 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-14 09:05:42,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 09:05:42,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:05:42,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:42,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:05:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:05:42,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:05:42,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115236189] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:42,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:05:42,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 6 [2022-12-14 09:05:42,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863347875] [2022-12-14 09:05:42,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:42,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:05:42,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:42,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:05:42,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:05:42,310 INFO L87 Difference]: Start difference. First operand 24060 states and 97799 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:42,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:42,571 INFO L93 Difference]: Finished difference Result 18875 states and 74758 transitions. [2022-12-14 09:05:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:42,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 09:05:42,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:42,645 INFO L225 Difference]: With dead ends: 18875 [2022-12-14 09:05:42,646 INFO L226 Difference]: Without dead ends: 18875 [2022-12-14 09:05:42,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:05:42,646 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:42,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:42,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18875 states. [2022-12-14 09:05:42,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18875 to 18875. [2022-12-14 09:05:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18875 states, 15020 states have (on average 4.9772303595206395) internal successors, (74758), 18874 states have internal predecessors, (74758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18875 states to 18875 states and 74758 transitions. [2022-12-14 09:05:43,034 INFO L78 Accepts]: Start accepts. Automaton has 18875 states and 74758 transitions. Word has length 19 [2022-12-14 09:05:43,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:43,035 INFO L495 AbstractCegarLoop]: Abstraction has 18875 states and 74758 transitions. [2022-12-14 09:05:43,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 18875 states and 74758 transitions. [2022-12-14 09:05:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:05:43,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:43,035 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1] [2022-12-14 09:05:43,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:05:43,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:43,237 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:43,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:43,238 INFO L85 PathProgramCache]: Analyzing trace with hash -173770151, now seen corresponding path program 1 times [2022-12-14 09:05:43,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:43,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438731814] [2022-12-14 09:05:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:43,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:05:43,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:43,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438731814] [2022-12-14 09:05:43,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438731814] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:43,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:43,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:05:43,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460444742] [2022-12-14 09:05:43,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:05:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:43,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:05:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:43,503 INFO L87 Difference]: Start difference. First operand 18875 states and 74758 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:43,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:43,752 INFO L93 Difference]: Finished difference Result 13690 states and 51717 transitions. [2022-12-14 09:05:43,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:43,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 09:05:43,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:43,817 INFO L225 Difference]: With dead ends: 13690 [2022-12-14 09:05:43,817 INFO L226 Difference]: Without dead ends: 13690 [2022-12-14 09:05:43,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:43,818 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:43,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:43,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13690 states. [2022-12-14 09:05:44,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13690 to 13690. [2022-12-14 09:05:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 11411 states have (on average 4.532205766365787) internal successors, (51717), 13689 states have internal predecessors, (51717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 51717 transitions. [2022-12-14 09:05:44,266 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 51717 transitions. Word has length 19 [2022-12-14 09:05:44,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:44,266 INFO L495 AbstractCegarLoop]: Abstraction has 13690 states and 51717 transitions. [2022-12-14 09:05:44,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:44,266 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 51717 transitions. [2022-12-14 09:05:44,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:05:44,267 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:44,267 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:44,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-14 09:05:44,267 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:44,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:44,268 INFO L85 PathProgramCache]: Analyzing trace with hash 510690038, now seen corresponding path program 1 times [2022-12-14 09:05:44,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:44,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804580036] [2022-12-14 09:05:44,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:44,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:05:44,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:44,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804580036] [2022-12-14 09:05:44,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804580036] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:44,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:44,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:05:44,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739596455] [2022-12-14 09:05:44,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:44,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:05:44,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:44,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:05:44,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:44,589 INFO L87 Difference]: Start difference. First operand 13690 states and 51717 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:44,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:44,831 INFO L93 Difference]: Finished difference Result 13450 states and 50957 transitions. [2022-12-14 09:05:44,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:44,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-14 09:05:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:44,890 INFO L225 Difference]: With dead ends: 13450 [2022-12-14 09:05:44,890 INFO L226 Difference]: Without dead ends: 13450 [2022-12-14 09:05:44,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:44,891 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:44,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13450 states. [2022-12-14 09:05:45,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13450 to 13450. [2022-12-14 09:05:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13450 states, 11291 states have (on average 4.513063501904171) internal successors, (50957), 13449 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:45,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13450 states to 13450 states and 50957 transitions. [2022-12-14 09:05:45,251 INFO L78 Accepts]: Start accepts. Automaton has 13450 states and 50957 transitions. Word has length 21 [2022-12-14 09:05:45,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:45,251 INFO L495 AbstractCegarLoop]: Abstraction has 13450 states and 50957 transitions. [2022-12-14 09:05:45,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:45,252 INFO L276 IsEmpty]: Start isEmpty. Operand 13450 states and 50957 transitions. [2022-12-14 09:05:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-14 09:05:45,252 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:45,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:45,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 09:05:45,252 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:45,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 510690039, now seen corresponding path program 1 times [2022-12-14 09:05:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:45,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735256577] [2022-12-14 09:05:45,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:45,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:05:45,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:45,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735256577] [2022-12-14 09:05:45,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735256577] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:45,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:45,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:05:45,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049551155] [2022-12-14 09:05:45,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:45,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:05:45,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:05:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:05:45,538 INFO L87 Difference]: Start difference. First operand 13450 states and 50957 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) [2022-12-14 09:05:45,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:45,789 INFO L93 Difference]: Finished difference Result 13210 states and 50197 transitions. [2022-12-14 09:05:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:05:45,790 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 21 [2022-12-14 09:05:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:45,859 INFO L225 Difference]: With dead ends: 13210 [2022-12-14 09:05:45,859 INFO L226 Difference]: Without dead ends: 13210 [2022-12-14 09:05:45,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:05:45,860 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 165 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:45,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 0 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:45,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13210 states. [2022-12-14 09:05:46,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13210 to 13210. [2022-12-14 09:05:46,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13210 states, 11171 states have (on average 4.493509981201325) internal successors, (50197), 13209 states have internal predecessors, (50197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13210 states to 13210 states and 50197 transitions. [2022-12-14 09:05:46,227 INFO L78 Accepts]: Start accepts. Automaton has 13210 states and 50197 transitions. Word has length 21 [2022-12-14 09:05:46,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:46,228 INFO L495 AbstractCegarLoop]: Abstraction has 13210 states and 50197 transitions. [2022-12-14 09:05:46,228 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) [2022-12-14 09:05:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 13210 states and 50197 transitions. [2022-12-14 09:05:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:05:46,228 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:46,229 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:46,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-14 09:05:46,229 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:46,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1348468508, now seen corresponding path program 1 times [2022-12-14 09:05:46,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:46,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849011508] [2022-12-14 09:05:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:46,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:46,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:46,794 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:05:46,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849011508] [2022-12-14 09:05:46,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849011508] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:46,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569432740] [2022-12-14 09:05:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:46,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:46,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:46,796 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:46,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 09:05:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:46,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:05:46,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:46,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:05:47,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:47,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:05:47,081 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:05:47,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:05:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:05:47,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:05:53,263 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:05:53,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-12-14 09:05:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:05:53,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569432740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:05:53,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2102048113] [2022-12-14 09:05:53,557 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:05:53,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:05:53,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-12-14 09:05:53,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82528469] [2022-12-14 09:05:53,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:05:53,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-12-14 09:05:53,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-12-14 09:05:53,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2022-12-14 09:05:53,559 INFO L87 Difference]: Start difference. First operand 13210 states and 50197 transitions. Second operand has 26 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:54,911 INFO L93 Difference]: Finished difference Result 34290 states and 130085 transitions. [2022-12-14 09:05:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 09:05:54,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 09:05:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:55,069 INFO L225 Difference]: With dead ends: 34290 [2022-12-14 09:05:55,069 INFO L226 Difference]: Without dead ends: 34290 [2022-12-14 09:05:55,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=388, Invalid=1018, Unknown=0, NotChecked=0, Total=1406 [2022-12-14 09:05:55,070 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1202 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:55,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1202 Valid, 0 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:05:55,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34290 states. [2022-12-14 09:05:55,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34290 to 20100. [2022-12-14 09:05:55,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20100 states, 18061 states have (on average 4.9973423398482915) internal successors, (90257), 20099 states have internal predecessors, (90257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20100 states to 20100 states and 90257 transitions. [2022-12-14 09:05:55,726 INFO L78 Accepts]: Start accepts. Automaton has 20100 states and 90257 transitions. Word has length 22 [2022-12-14 09:05:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:55,726 INFO L495 AbstractCegarLoop]: Abstraction has 20100 states and 90257 transitions. [2022-12-14 09:05:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20100 states and 90257 transitions. [2022-12-14 09:05:55,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:05:55,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:55,726 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:55,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-14 09:05:55,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 09:05:55,928 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1348468507, now seen corresponding path program 1 times [2022-12-14 09:05:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465931235] [2022-12-14 09:05:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:55,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:56,033 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-14 09:05:56,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:56,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465931235] [2022-12-14 09:05:56,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465931235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:56,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:56,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:05:56,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932610502] [2022-12-14 09:05:56,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:56,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:05:56,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:56,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:05:56,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:05:56,035 INFO L87 Difference]: Start difference. First operand 20100 states and 90257 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:56,250 INFO L93 Difference]: Finished difference Result 16344 states and 71137 transitions. [2022-12-14 09:05:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:05:56,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 22 [2022-12-14 09:05:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:56,311 INFO L225 Difference]: With dead ends: 16344 [2022-12-14 09:05:56,311 INFO L226 Difference]: Without dead ends: 16344 [2022-12-14 09:05:56,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:56,312 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 230 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:56,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16344 states. [2022-12-14 09:05:56,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16344 to 16344. [2022-12-14 09:05:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16344 states, 15012 states have (on average 4.738675726085798) internal successors, (71137), 16343 states have internal predecessors, (71137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16344 states to 16344 states and 71137 transitions. [2022-12-14 09:05:56,643 INFO L78 Accepts]: Start accepts. Automaton has 16344 states and 71137 transitions. Word has length 22 [2022-12-14 09:05:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:56,643 INFO L495 AbstractCegarLoop]: Abstraction has 16344 states and 71137 transitions. [2022-12-14 09:05:56,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 16344 states and 71137 transitions. [2022-12-14 09:05:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:05:56,644 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:56,644 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:56,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-14 09:05:56,644 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1348468506, now seen corresponding path program 1 times [2022-12-14 09:05:56,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:56,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303193694] [2022-12-14 09:05:56,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:56,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:05:56,767 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:56,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303193694] [2022-12-14 09:05:56,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303193694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:05:56,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:05:56,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:05:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759219024] [2022-12-14 09:05:56,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:05:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:05:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:05:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:05:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:05:56,768 INFO L87 Difference]: Start difference. First operand 16344 states and 71137 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:56,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:05:56,968 INFO L93 Difference]: Finished difference Result 13050 states and 55423 transitions. [2022-12-14 09:05:56,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:05:56,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 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 22 [2022-12-14 09:05:56,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:05:57,019 INFO L225 Difference]: With dead ends: 13050 [2022-12-14 09:05:57,019 INFO L226 Difference]: Without dead ends: 13050 [2022-12-14 09:05:57,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:05:57,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 212 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:05:57,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 0 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:05:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13050 states. [2022-12-14 09:05:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13050 to 13050. [2022-12-14 09:05:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13050 states, 12270 states have (on average 4.516951915240424) internal successors, (55423), 13049 states have internal predecessors, (55423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13050 states to 13050 states and 55423 transitions. [2022-12-14 09:05:57,350 INFO L78 Accepts]: Start accepts. Automaton has 13050 states and 55423 transitions. Word has length 22 [2022-12-14 09:05:57,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:05:57,351 INFO L495 AbstractCegarLoop]: Abstraction has 13050 states and 55423 transitions. [2022-12-14 09:05:57,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:05:57,351 INFO L276 IsEmpty]: Start isEmpty. Operand 13050 states and 55423 transitions. [2022-12-14 09:05:57,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-12-14 09:05:57,352 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:05:57,352 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:05:57,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-14 09:05:57,352 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:05:57,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:05:57,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1348468505, now seen corresponding path program 1 times [2022-12-14 09:05:57,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:05:57,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583664955] [2022-12-14 09:05:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:05:57,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-12-14 09:05:57,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:05:57,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583664955] [2022-12-14 09:05:57,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583664955] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:05:57,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82940898] [2022-12-14 09:05:57,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:05:57,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:05:57,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:05:57,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:05:57,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 09:05:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:05:57,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:05:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:05:57,899 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:05:57,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:05:57,940 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:05:57,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:05:58,052 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:05:58,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:05:58,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:05:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:05:58,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:05:58,103 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:05:58,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:05:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:05:58,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:04,274 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:07,281 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:07,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82940898] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:07,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:06:07,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7, 9] total 25 [2022-12-14 09:06:07,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805828577] [2022-12-14 09:06:07,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:07,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:06:07,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:07,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:06:07,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2022-12-14 09:06:07,283 INFO L87 Difference]: Start difference. First operand 13050 states and 55423 transitions. Second operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:08,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:08,026 INFO L93 Difference]: Finished difference Result 13842 states and 57317 transitions. [2022-12-14 09:06:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-12-14 09:06:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:08,073 INFO L225 Difference]: With dead ends: 13842 [2022-12-14 09:06:08,073 INFO L226 Difference]: Without dead ends: 13842 [2022-12-14 09:06:08,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:06:08,074 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 369 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:08,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [369 Valid, 0 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:06:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13842 states. [2022-12-14 09:06:08,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13842 to 13050. [2022-12-14 09:06:08,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13050 states, 12270 states have (on average 4.482559087204564) internal successors, (55001), 13049 states have internal predecessors, (55001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13050 states to 13050 states and 55001 transitions. [2022-12-14 09:06:08,332 INFO L78 Accepts]: Start accepts. Automaton has 13050 states and 55001 transitions. Word has length 22 [2022-12-14 09:06:08,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:08,333 INFO L495 AbstractCegarLoop]: Abstraction has 13050 states and 55001 transitions. [2022-12-14 09:06:08,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:08,333 INFO L276 IsEmpty]: Start isEmpty. Operand 13050 states and 55001 transitions. [2022-12-14 09:06:08,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:06:08,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:08,333 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:08,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 09:06:08,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 09:06:08,535 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1147151906, now seen corresponding path program 1 times [2022-12-14 09:06:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:08,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839689079] [2022-12-14 09:06:08,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:08,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:08,614 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:08,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:08,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839689079] [2022-12-14 09:06:08,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839689079] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:08,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:08,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:06:08,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250540754] [2022-12-14 09:06:08,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:08,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:06:08,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:08,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:06:08,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:06:08,616 INFO L87 Difference]: Start difference. First operand 13050 states and 55001 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:08,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:08,952 INFO L93 Difference]: Finished difference Result 14996 states and 60911 transitions. [2022-12-14 09:06:08,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:08,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:06:08,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:09,004 INFO L225 Difference]: With dead ends: 14996 [2022-12-14 09:06:09,004 INFO L226 Difference]: Without dead ends: 14996 [2022-12-14 09:06:09,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:06:09,005 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 287 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:09,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 0 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:06:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14996 states. [2022-12-14 09:06:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14996 to 13050. [2022-12-14 09:06:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13050 states, 12270 states have (on average 4.413773431132844) internal successors, (54157), 13049 states have internal predecessors, (54157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13050 states to 13050 states and 54157 transitions. [2022-12-14 09:06:09,288 INFO L78 Accepts]: Start accepts. Automaton has 13050 states and 54157 transitions. Word has length 23 [2022-12-14 09:06:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:09,289 INFO L495 AbstractCegarLoop]: Abstraction has 13050 states and 54157 transitions. [2022-12-14 09:06:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 13050 states and 54157 transitions. [2022-12-14 09:06:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:06:09,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:09,290 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:09,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-14 09:06:09,290 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:09,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:09,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1146938467, now seen corresponding path program 1 times [2022-12-14 09:06:09,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:09,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463822720] [2022-12-14 09:06:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:06:09,453 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463822720] [2022-12-14 09:06:09,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463822720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:09,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:09,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:06:09,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426270821] [2022-12-14 09:06:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:06:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:06:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:06:09,454 INFO L87 Difference]: Start difference. First operand 13050 states and 54157 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:09,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:09,637 INFO L93 Difference]: Finished difference Result 12412 states and 51815 transitions. [2022-12-14 09:06:09,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:06:09,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:06:09,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:09,681 INFO L225 Difference]: With dead ends: 12412 [2022-12-14 09:06:09,682 INFO L226 Difference]: Without dead ends: 12412 [2022-12-14 09:06:09,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:06:09,682 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:09,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:09,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12412 states. [2022-12-14 09:06:09,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12412 to 12412. [2022-12-14 09:06:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12412 states, 11734 states have (on average 4.415800238622806) internal successors, (51815), 12411 states have internal predecessors, (51815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12412 states to 12412 states and 51815 transitions. [2022-12-14 09:06:09,965 INFO L78 Accepts]: Start accepts. Automaton has 12412 states and 51815 transitions. Word has length 23 [2022-12-14 09:06:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:09,965 INFO L495 AbstractCegarLoop]: Abstraction has 12412 states and 51815 transitions. [2022-12-14 09:06:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 12412 states and 51815 transitions. [2022-12-14 09:06:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-14 09:06:09,966 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:09,966 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:09,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-14 09:06:09,966 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:09,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1146938468, now seen corresponding path program 1 times [2022-12-14 09:06:09,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:09,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111630969] [2022-12-14 09:06:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:10,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:10,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111630969] [2022-12-14 09:06:10,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111630969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:10,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238822176] [2022-12-14 09:06:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:10,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:10,451 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:10,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 09:06:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:10,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:06:10,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:10,617 INFO L321 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2022-12-14 09:06:10,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2022-12-14 09:06:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:06:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:10,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:06:10,707 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:10,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:06:10,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238822176] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:10,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:06:10,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-12-14 09:06:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937994296] [2022-12-14 09:06:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:10,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:06:10,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:10,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:06:10,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=71, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:06:10,708 INFO L87 Difference]: Start difference. First operand 12412 states and 51815 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:10,847 INFO L93 Difference]: Finished difference Result 11774 states and 49473 transitions. [2022-12-14 09:06:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:06:10,847 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-14 09:06:10,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:10,890 INFO L225 Difference]: With dead ends: 11774 [2022-12-14 09:06:10,890 INFO L226 Difference]: Without dead ends: 11774 [2022-12-14 09:06:10,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=71, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:06:10,891 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:10,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2022-12-14 09:06:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 11774. [2022-12-14 09:06:11,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11774 states, 11198 states have (on average 4.418021075191999) internal successors, (49473), 11773 states have internal predecessors, (49473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11774 states to 11774 states and 49473 transitions. [2022-12-14 09:06:11,128 INFO L78 Accepts]: Start accepts. Automaton has 11774 states and 49473 transitions. Word has length 23 [2022-12-14 09:06:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:11,129 INFO L495 AbstractCegarLoop]: Abstraction has 11774 states and 49473 transitions. [2022-12-14 09:06:11,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:11,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11774 states and 49473 transitions. [2022-12-14 09:06:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:06:11,129 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:11,129 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:11,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 09:06:11,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:11,330 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1195364887, now seen corresponding path program 1 times [2022-12-14 09:06:11,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:11,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492976968] [2022-12-14 09:06:11,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:11,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:11,827 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:06:11,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492976968] [2022-12-14 09:06:11,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492976968] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:11,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548339546] [2022-12-14 09:06:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:11,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:11,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:11,829 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:11,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 09:06:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:06:11,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:11,979 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:06:11,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:06:12,009 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:06:12,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:06:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:12,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:06:12,146 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:06:12,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:06:12,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:12,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:06:12,200 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:06:12,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:06:12,254 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:12,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:18,392 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:21,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548339546] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:21,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:06:21,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [14, 9] total 32 [2022-12-14 09:06:21,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696067178] [2022-12-14 09:06:21,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:21,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-14 09:06:21,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:21,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-14 09:06:21,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2022-12-14 09:06:21,553 INFO L87 Difference]: Start difference. First operand 11774 states and 49473 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:22,243 INFO L93 Difference]: Finished difference Result 12904 states and 55657 transitions. [2022-12-14 09:06:22,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 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 24 [2022-12-14 09:06:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:22,286 INFO L225 Difference]: With dead ends: 12904 [2022-12-14 09:06:22,286 INFO L226 Difference]: Without dead ends: 12904 [2022-12-14 09:06:22,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-12-14 09:06:22,287 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 429 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:22,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [429 Valid, 0 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:06:22,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12904 states. [2022-12-14 09:06:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12904 to 12330. [2022-12-14 09:06:22,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12330 states, 11754 states have (on average 4.588820826952527) internal successors, (53937), 12329 states have internal predecessors, (53937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12330 states to 12330 states and 53937 transitions. [2022-12-14 09:06:22,535 INFO L78 Accepts]: Start accepts. Automaton has 12330 states and 53937 transitions. Word has length 24 [2022-12-14 09:06:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:22,535 INFO L495 AbstractCegarLoop]: Abstraction has 12330 states and 53937 transitions. [2022-12-14 09:06:22,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12330 states and 53937 transitions. [2022-12-14 09:06:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:06:22,536 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:22,536 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:22,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-14 09:06:22,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 09:06:22,738 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1195364889, now seen corresponding path program 1 times [2022-12-14 09:06:22,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556197705] [2022-12-14 09:06:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:22,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:22,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556197705] [2022-12-14 09:06:22,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556197705] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:22,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91696369] [2022-12-14 09:06:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:22,939 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 09:06:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:23,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:06:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:23,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:23,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:06:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:23,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91696369] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1586817190] [2022-12-14 09:06:23,257 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:06:23,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:23,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-12-14 09:06:23,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577726902] [2022-12-14 09:06:23,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:23,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:06:23,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:23,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:06:23,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:06:23,259 INFO L87 Difference]: Start difference. First operand 12330 states and 53937 transitions. Second operand has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:24,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:24,081 INFO L93 Difference]: Finished difference Result 29046 states and 122321 transitions. [2022-12-14 09:06:24,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:06:24,082 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 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 24 [2022-12-14 09:06:24,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:24,200 INFO L225 Difference]: With dead ends: 29046 [2022-12-14 09:06:24,200 INFO L226 Difference]: Without dead ends: 29046 [2022-12-14 09:06:24,201 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=759, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:06:24,201 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1153 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:24,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1153 Valid, 0 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:06:24,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29046 states. [2022-12-14 09:06:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29046 to 19002. [2022-12-14 09:06:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19002 states, 18426 states have (on average 4.899001411049603) internal successors, (90269), 19001 states have internal predecessors, (90269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:24,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19002 states to 19002 states and 90269 transitions. [2022-12-14 09:06:24,712 INFO L78 Accepts]: Start accepts. Automaton has 19002 states and 90269 transitions. Word has length 24 [2022-12-14 09:06:24,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:24,713 INFO L495 AbstractCegarLoop]: Abstraction has 19002 states and 90269 transitions. [2022-12-14 09:06:24,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:24,713 INFO L276 IsEmpty]: Start isEmpty. Operand 19002 states and 90269 transitions. [2022-12-14 09:06:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 09:06:24,713 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:24,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:24,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 09:06:24,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 09:06:24,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:24,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:24,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1195364890, now seen corresponding path program 1 times [2022-12-14 09:06:24,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:24,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382318269] [2022-12-14 09:06:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:24,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:06:24,977 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:24,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382318269] [2022-12-14 09:06:24,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382318269] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:24,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:24,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:06:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170086023] [2022-12-14 09:06:24,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:24,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:06:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:24,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:06:24,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:06:24,978 INFO L87 Difference]: Start difference. First operand 19002 states and 90269 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:25,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:25,172 INFO L93 Difference]: Finished difference Result 13054 states and 59985 transitions. [2022-12-14 09:06:25,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:06:25,173 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-14 09:06:25,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:25,219 INFO L225 Difference]: With dead ends: 13054 [2022-12-14 09:06:25,219 INFO L226 Difference]: Without dead ends: 13054 [2022-12-14 09:06:25,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:06:25,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:25,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 0 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:06:25,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13054 states. [2022-12-14 09:06:25,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13054 to 13054. [2022-12-14 09:06:25,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 12798 states have (on average 4.687060478199719) internal successors, (59985), 13053 states have internal predecessors, (59985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 59985 transitions. [2022-12-14 09:06:25,518 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 59985 transitions. Word has length 24 [2022-12-14 09:06:25,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:25,518 INFO L495 AbstractCegarLoop]: Abstraction has 13054 states and 59985 transitions. [2022-12-14 09:06:25,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:25,519 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 59985 transitions. [2022-12-14 09:06:25,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 09:06:25,519 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:25,519 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:25,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-14 09:06:25,519 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1598391247, now seen corresponding path program 1 times [2022-12-14 09:06:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:25,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898593688] [2022-12-14 09:06:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:25,595 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:25,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898593688] [2022-12-14 09:06:25,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898593688] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:06:25,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:06:25,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:06:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354692116] [2022-12-14 09:06:25,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:25,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:06:25,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:25,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:06:25,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:06:25,596 INFO L87 Difference]: Start difference. First operand 13054 states and 59985 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:25,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:25,992 INFO L93 Difference]: Finished difference Result 14322 states and 64109 transitions. [2022-12-14 09:06:25,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:25,993 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-12-14 09:06:25,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:26,041 INFO L225 Difference]: With dead ends: 14322 [2022-12-14 09:06:26,041 INFO L226 Difference]: Without dead ends: 14322 [2022-12-14 09:06:26,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:06:26,042 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 212 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:26,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 0 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:06:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14322 states. [2022-12-14 09:06:26,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14322 to 13054. [2022-12-14 09:06:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13054 states, 12798 states have (on average 4.619549929676512) internal successors, (59121), 13053 states have internal predecessors, (59121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:26,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13054 states to 13054 states and 59121 transitions. [2022-12-14 09:06:26,316 INFO L78 Accepts]: Start accepts. Automaton has 13054 states and 59121 transitions. Word has length 25 [2022-12-14 09:06:26,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:26,316 INFO L495 AbstractCegarLoop]: Abstraction has 13054 states and 59121 transitions. [2022-12-14 09:06:26,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:26,316 INFO L276 IsEmpty]: Start isEmpty. Operand 13054 states and 59121 transitions. [2022-12-14 09:06:26,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 09:06:26,317 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:26,317 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:26,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-12-14 09:06:26,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:26,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:26,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1981541022, now seen corresponding path program 1 times [2022-12-14 09:06:26,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:26,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484225170] [2022-12-14 09:06:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:26,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:26,460 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:06:26,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484225170] [2022-12-14 09:06:26,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484225170] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828335200] [2022-12-14 09:06:26,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:26,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:26,461 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:26,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 09:06:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:26,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:06:26,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:26,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:26,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-12-14 09:06:26,757 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:26,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828335200] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:26,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [177775258] [2022-12-14 09:06:26,758 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:06:26,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:26,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2022-12-14 09:06:26,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033556865] [2022-12-14 09:06:26,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:26,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-12-14 09:06:26,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:26,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-12-14 09:06:26,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:06:26,759 INFO L87 Difference]: Start difference. First operand 13054 states and 59121 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:27,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:27,391 INFO L93 Difference]: Finished difference Result 24230 states and 109009 transitions. [2022-12-14 09:06:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:06:27,392 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 09:06:27,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:27,487 INFO L225 Difference]: With dead ends: 24230 [2022-12-14 09:06:27,487 INFO L226 Difference]: Without dead ends: 24230 [2022-12-14 09:06:27,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:06:27,488 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 576 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:27,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 0 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:06:27,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24230 states. [2022-12-14 09:06:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24230 to 16778. [2022-12-14 09:06:27,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16778 states, 16522 states have (on average 5.035528386393899) internal successors, (83197), 16777 states have internal predecessors, (83197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:27,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 83197 transitions. [2022-12-14 09:06:27,980 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 83197 transitions. Word has length 26 [2022-12-14 09:06:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:27,980 INFO L495 AbstractCegarLoop]: Abstraction has 16778 states and 83197 transitions. [2022-12-14 09:06:27,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 83197 transitions. [2022-12-14 09:06:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 09:06:27,981 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:27,981 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:27,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-14 09:06:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-14 09:06:28,183 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:28,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:28,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1981540961, now seen corresponding path program 1 times [2022-12-14 09:06:28,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:28,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052571312] [2022-12-14 09:06:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:28,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:06:28,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:28,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052571312] [2022-12-14 09:06:28,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052571312] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:28,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565400983] [2022-12-14 09:06:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:28,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:28,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:28,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:28,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 09:06:28,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-14 09:06:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:28,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:06:28,691 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:06:28,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:06:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:28,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565400983] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:28,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:06:28,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 9] total 22 [2022-12-14 09:06:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091242142] [2022-12-14 09:06:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:28,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:06:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:06:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:06:28,969 INFO L87 Difference]: Start difference. First operand 16778 states and 83197 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:29,440 INFO L93 Difference]: Finished difference Result 18642 states and 87789 transitions. [2022-12-14 09:06:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:06:29,440 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 09:06:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:29,511 INFO L225 Difference]: With dead ends: 18642 [2022-12-14 09:06:29,511 INFO L226 Difference]: Without dead ends: 18642 [2022-12-14 09:06:29,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:06:29,512 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 306 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:29,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 0 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:06:29,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18642 states. [2022-12-14 09:06:29,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18642 to 16778. [2022-12-14 09:06:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16778 states, 16522 states have (on average 4.922830165839486) internal successors, (81335), 16777 states have internal predecessors, (81335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16778 states to 16778 states and 81335 transitions. [2022-12-14 09:06:29,877 INFO L78 Accepts]: Start accepts. Automaton has 16778 states and 81335 transitions. Word has length 26 [2022-12-14 09:06:29,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:29,877 INFO L495 AbstractCegarLoop]: Abstraction has 16778 states and 81335 transitions. [2022-12-14 09:06:29,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:29,878 INFO L276 IsEmpty]: Start isEmpty. Operand 16778 states and 81335 transitions. [2022-12-14 09:06:29,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:06:29,878 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:29,878 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:29,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-14 09:06:30,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:30,079 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:30,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1663143730, now seen corresponding path program 1 times [2022-12-14 09:06:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:30,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70662149] [2022-12-14 09:06:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:30,588 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:06:30,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70662149] [2022-12-14 09:06:30,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70662149] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:30,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710920762] [2022-12-14 09:06:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:30,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:30,589 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:30,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 09:06:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:30,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:06:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:30,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-12-14 09:06:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:30,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:31,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710920762] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:31,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:06:31,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [15, 6] total 23 [2022-12-14 09:06:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432247203] [2022-12-14 09:06:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:06:31,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:06:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:06:31,146 INFO L87 Difference]: Start difference. First operand 16778 states and 81335 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:31,494 INFO L93 Difference]: Finished difference Result 19986 states and 94625 transitions. [2022-12-14 09:06:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:06:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 09:06:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:31,572 INFO L225 Difference]: With dead ends: 19986 [2022-12-14 09:06:31,572 INFO L226 Difference]: Without dead ends: 19986 [2022-12-14 09:06:31,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-14 09:06:31,573 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:31,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:06:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19986 states. [2022-12-14 09:06:31,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19986 to 17862. [2022-12-14 09:06:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17862 states, 17606 states have (on average 4.889412700215836) internal successors, (86083), 17861 states have internal predecessors, (86083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:32,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17862 states to 17862 states and 86083 transitions. [2022-12-14 09:06:32,081 INFO L78 Accepts]: Start accepts. Automaton has 17862 states and 86083 transitions. Word has length 27 [2022-12-14 09:06:32,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:32,081 INFO L495 AbstractCegarLoop]: Abstraction has 17862 states and 86083 transitions. [2022-12-14 09:06:32,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:32,081 INFO L276 IsEmpty]: Start isEmpty. Operand 17862 states and 86083 transitions. [2022-12-14 09:06:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-12-14 09:06:32,082 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:32,083 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:32,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 09:06:32,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-12-14 09:06:32,284 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:32,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1298235943, now seen corresponding path program 1 times [2022-12-14 09:06:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:32,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648011128] [2022-12-14 09:06:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:32,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:32,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648011128] [2022-12-14 09:06:32,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648011128] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046425468] [2022-12-14 09:06:32,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:32,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:32,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:32,565 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:32,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 09:06:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:32,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 49 conjunts are in the unsatisfiable core [2022-12-14 09:06:32,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:32,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:06:32,914 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:06:32,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:06:33,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 95 [2022-12-14 09:06:33,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 93 [2022-12-14 09:06:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:06:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:33,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2022-12-14 09:06:33,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-12-14 09:06:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:33,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046425468] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:33,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809174531] [2022-12-14 09:06:33,482 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:06:33,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:33,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16, 10] total 34 [2022-12-14 09:06:33,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140381338] [2022-12-14 09:06:33,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:33,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:06:33,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:33,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:06:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:06:33,484 INFO L87 Difference]: Start difference. First operand 17862 states and 86083 transitions. Second operand has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:35,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:35,014 INFO L93 Difference]: Finished difference Result 33726 states and 154461 transitions. [2022-12-14 09:06:35,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-14 09:06:35,015 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-12-14 09:06:35,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:35,180 INFO L225 Difference]: With dead ends: 33726 [2022-12-14 09:06:35,181 INFO L226 Difference]: Without dead ends: 33726 [2022-12-14 09:06:35,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=555, Invalid=2097, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 09:06:35,182 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1023 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1597 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:35,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 0 Invalid, 1669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1597 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:06:35,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33726 states. [2022-12-14 09:06:35,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33726 to 21826. [2022-12-14 09:06:35,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21826 states, 21570 states have (on average 5.265693092257766) internal successors, (113581), 21825 states have internal predecessors, (113581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 113581 transitions. [2022-12-14 09:06:35,759 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 113581 transitions. Word has length 27 [2022-12-14 09:06:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:35,760 INFO L495 AbstractCegarLoop]: Abstraction has 21826 states and 113581 transitions. [2022-12-14 09:06:35,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 35 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 113581 transitions. [2022-12-14 09:06:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:06:35,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:35,761 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:35,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 09:06:35,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-12-14 09:06:35,963 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:35,964 INFO L85 PathProgramCache]: Analyzing trace with hash 14427212, now seen corresponding path program 1 times [2022-12-14 09:06:35,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:35,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004151054] [2022-12-14 09:06:35,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:35,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:35,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:06:36,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004151054] [2022-12-14 09:06:36,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004151054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:36,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776376941] [2022-12-14 09:06:36,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:36,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:36,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:36,437 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:36,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 09:06:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:36,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 42 conjunts are in the unsatisfiable core [2022-12-14 09:06:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:36,673 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:06:36,673 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:06:36,714 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:06:36,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:06:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:36,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:06:36,865 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:06:36,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:06:36,917 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:06:36,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:06:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:37,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:37,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 120 [2022-12-14 09:06:37,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 118 [2022-12-14 09:06:43,360 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:06:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:43,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776376941] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451818440] [2022-12-14 09:06:43,690 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:06:43,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:43,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 10] total 33 [2022-12-14 09:06:43,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798357669] [2022-12-14 09:06:43,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:43,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 09:06:43,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:43,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 09:06:43,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:06:43,691 INFO L87 Difference]: Start difference. First operand 21826 states and 113581 transitions. Second operand has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:45,832 INFO L93 Difference]: Finished difference Result 58698 states and 293893 transitions. [2022-12-14 09:06:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:06:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 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 28 [2022-12-14 09:06:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:46,216 INFO L225 Difference]: With dead ends: 58698 [2022-12-14 09:06:46,217 INFO L226 Difference]: Without dead ends: 58698 [2022-12-14 09:06:46,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=610, Invalid=2146, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:06:46,219 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1861 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1861 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:46,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1861 Valid, 0 Invalid, 2104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:06:46,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58698 states. [2022-12-14 09:06:47,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58698 to 40362. [2022-12-14 09:06:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40362 states, 40170 states have (on average 5.355563853622106) internal successors, (215133), 40361 states have internal predecessors, (215133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40362 states to 40362 states and 215133 transitions. [2022-12-14 09:06:47,476 INFO L78 Accepts]: Start accepts. Automaton has 40362 states and 215133 transitions. Word has length 28 [2022-12-14 09:06:47,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:47,476 INFO L495 AbstractCegarLoop]: Abstraction has 40362 states and 215133 transitions. [2022-12-14 09:06:47,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:47,476 INFO L276 IsEmpty]: Start isEmpty. Operand 40362 states and 215133 transitions. [2022-12-14 09:06:47,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-14 09:06:47,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:47,477 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:47,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-14 09:06:47,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:47,679 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:47,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:47,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1590616926, now seen corresponding path program 1 times [2022-12-14 09:06:47,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:47,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483155358] [2022-12-14 09:06:47,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:47,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:48,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:48,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483155358] [2022-12-14 09:06:48,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483155358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:48,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501719070] [2022-12-14 09:06:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:48,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:48,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:48,035 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:48,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 09:06:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:48,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-14 09:06:48,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:48,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-12-14 09:06:48,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 35 [2022-12-14 09:06:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:48,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:48,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 125 [2022-12-14 09:06:48,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 123 [2022-12-14 09:06:48,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 09:06:48,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:48,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501719070] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:06:48,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1768946049] [2022-12-14 09:06:48,664 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:06:48,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:06:48,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-14 09:06:48,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193208173] [2022-12-14 09:06:48,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:06:48,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:06:48,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:48,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:06:48,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:06:48,666 INFO L87 Difference]: Start difference. First operand 40362 states and 215133 transitions. Second operand has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:50,131 INFO L93 Difference]: Finished difference Result 66006 states and 302845 transitions. [2022-12-14 09:06:50,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:06:50,132 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-12-14 09:06:50,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:50,441 INFO L225 Difference]: With dead ends: 66006 [2022-12-14 09:06:50,441 INFO L226 Difference]: Without dead ends: 66006 [2022-12-14 09:06:50,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:06:50,442 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1262 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1563 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1262 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:50,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1262 Valid, 0 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1563 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:06:50,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66006 states. [2022-12-14 09:06:51,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66006 to 44024. [2022-12-14 09:06:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44024 states, 43832 states have (on average 5.122353531666363) internal successors, (224523), 44023 states have internal predecessors, (224523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:51,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44024 states to 44024 states and 224523 transitions. [2022-12-14 09:06:51,792 INFO L78 Accepts]: Start accepts. Automaton has 44024 states and 224523 transitions. Word has length 28 [2022-12-14 09:06:51,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:51,793 INFO L495 AbstractCegarLoop]: Abstraction has 44024 states and 224523 transitions. [2022-12-14 09:06:51,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 32 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 44024 states and 224523 transitions. [2022-12-14 09:06:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 09:06:51,794 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:51,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:51,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 09:06:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-14 09:06:51,997 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:51,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:51,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1393680484, now seen corresponding path program 1 times [2022-12-14 09:06:52,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:52,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367754425] [2022-12-14 09:06:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:52,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-14 09:06:52,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367754425] [2022-12-14 09:06:52,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367754425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:52,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019366508] [2022-12-14 09:06:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:52,415 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:52,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 09:06:52,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:52,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:06:52,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:52,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:06:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:06:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019366508] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:52,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:06:52,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 5] total 20 [2022-12-14 09:06:52,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050672096] [2022-12-14 09:06:52,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:06:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:06:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:06:52,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:06:52,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:06:52,730 INFO L87 Difference]: Start difference. First operand 44024 states and 224523 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:06:53,264 INFO L93 Difference]: Finished difference Result 49896 states and 250081 transitions. [2022-12-14 09:06:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:06:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-14 09:06:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:06:53,675 INFO L225 Difference]: With dead ends: 49896 [2022-12-14 09:06:53,675 INFO L226 Difference]: Without dead ends: 49896 [2022-12-14 09:06:53,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:06:53,675 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:06:53,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:06:53,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49896 states. [2022-12-14 09:06:54,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49896 to 44024. [2022-12-14 09:06:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44024 states, 43856 states have (on average 5.119550346588836) internal successors, (224523), 44023 states have internal predecessors, (224523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:54,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44024 states to 44024 states and 224523 transitions. [2022-12-14 09:06:54,858 INFO L78 Accepts]: Start accepts. Automaton has 44024 states and 224523 transitions. Word has length 29 [2022-12-14 09:06:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:06:54,859 INFO L495 AbstractCegarLoop]: Abstraction has 44024 states and 224523 transitions. [2022-12-14 09:06:54,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:06:54,859 INFO L276 IsEmpty]: Start isEmpty. Operand 44024 states and 224523 transitions. [2022-12-14 09:06:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:06:54,861 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:06:54,861 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:06:54,866 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-14 09:06:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-14 09:06:55,062 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:06:55,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:06:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash -257268722, now seen corresponding path program 1 times [2022-12-14 09:06:55,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:06:55,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619067139] [2022-12-14 09:06:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:55,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:06:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-14 09:06:55,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:06:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619067139] [2022-12-14 09:06:55,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619067139] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:06:55,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240418740] [2022-12-14 09:06:55,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:06:55,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:06:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:06:55,687 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:06:55,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-14 09:06:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:06:55,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:06:55,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:06:55,935 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:06:55,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:06:56,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:06:56,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-14 09:06:56,033 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 09:06:56,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-14 09:06:56,088 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 09:06:56,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-12-14 09:06:56,102 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-12-14 09:06:56,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:06:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:06:56,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:02,359 WARN L233 SmtUtils]: Spent 6.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:07:07,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 155 [2022-12-14 09:07:07,568 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:07,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240418740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:07,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [558662891] [2022-12-14 09:07:07,569 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:07:07,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:07:07,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 10] total 37 [2022-12-14 09:07:07,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380257015] [2022-12-14 09:07:07,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:07,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-14 09:07:07,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-14 09:07:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1281, Unknown=0, NotChecked=0, Total=1482 [2022-12-14 09:07:07,570 INFO L87 Difference]: Start difference. First operand 44024 states and 224523 transitions. Second operand has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:09,420 INFO L93 Difference]: Finished difference Result 108448 states and 531557 transitions. [2022-12-14 09:07:09,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:07:09,420 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 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 30 [2022-12-14 09:07:09,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:10,064 INFO L225 Difference]: With dead ends: 108448 [2022-12-14 09:07:10,064 INFO L226 Difference]: Without dead ends: 108448 [2022-12-14 09:07:10,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=660, Invalid=2202, Unknown=0, NotChecked=0, Total=2862 [2022-12-14 09:07:10,065 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2097 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2097 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:10,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2097 Valid, 0 Invalid, 846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:07:10,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108448 states. [2022-12-14 09:07:11,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108448 to 68878. [2022-12-14 09:07:11,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68878 states, 68758 states have (on average 5.165726170045668) internal successors, (355185), 68877 states have internal predecessors, (355185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:12,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68878 states to 68878 states and 355185 transitions. [2022-12-14 09:07:12,368 INFO L78 Accepts]: Start accepts. Automaton has 68878 states and 355185 transitions. Word has length 30 [2022-12-14 09:07:12,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:12,368 INFO L495 AbstractCegarLoop]: Abstraction has 68878 states and 355185 transitions. [2022-12-14 09:07:12,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 38 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:12,368 INFO L276 IsEmpty]: Start isEmpty. Operand 68878 states and 355185 transitions. [2022-12-14 09:07:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 09:07:12,370 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:12,371 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:12,376 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-12-14 09:07:12,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-14 09:07:12,571 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash -425284639, now seen corresponding path program 2 times [2022-12-14 09:07:12,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:12,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706133695] [2022-12-14 09:07:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:13,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-14 09:07:13,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706133695] [2022-12-14 09:07:13,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706133695] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:13,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393159235] [2022-12-14 09:07:13,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:07:13,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:13,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:13,614 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:13,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-14 09:07:13,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:07:13,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:07:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:07:13,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:13,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-12-14 09:07:13,887 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:07:13,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:07:14,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:14,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 272 treesize of output 242 [2022-12-14 09:07:14,023 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:07:14,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 230 [2022-12-14 09:07:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:14,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:07:14,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393159235] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:14,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:07:14,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 19 [2022-12-14 09:07:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758869637] [2022-12-14 09:07:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:07:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:07:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:07:14,324 INFO L87 Difference]: Start difference. First operand 68878 states and 355185 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:15,088 INFO L93 Difference]: Finished difference Result 68880 states and 343715 transitions. [2022-12-14 09:07:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 30 [2022-12-14 09:07:15,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:15,409 INFO L225 Difference]: With dead ends: 68880 [2022-12-14 09:07:15,409 INFO L226 Difference]: Without dead ends: 68880 [2022-12-14 09:07:15,410 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:07:15,410 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:15,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68880 states. [2022-12-14 09:07:16,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68880 to 63142. [2022-12-14 09:07:16,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63142 states, 63052 states have (on average 5.122137283512022) internal successors, (322961), 63141 states have internal predecessors, (322961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63142 states to 63142 states and 322961 transitions. [2022-12-14 09:07:17,180 INFO L78 Accepts]: Start accepts. Automaton has 63142 states and 322961 transitions. Word has length 30 [2022-12-14 09:07:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:17,180 INFO L495 AbstractCegarLoop]: Abstraction has 63142 states and 322961 transitions. [2022-12-14 09:07:17,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 63142 states and 322961 transitions. [2022-12-14 09:07:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-14 09:07:17,183 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:17,183 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:17,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-12-14 09:07:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-12-14 09:07:17,385 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:17,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:17,388 INFO L85 PathProgramCache]: Analyzing trace with hash -298913564, now seen corresponding path program 2 times [2022-12-14 09:07:17,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:17,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141110997] [2022-12-14 09:07:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:17,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 09:07:18,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:18,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141110997] [2022-12-14 09:07:18,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141110997] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:18,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773311775] [2022-12-14 09:07:18,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:07:18,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:18,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:18,410 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:18,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-14 09:07:18,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:07:18,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:07:18,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:07:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:18,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:07:18,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:07:18,665 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:07:18,666 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:07:18,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:07:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-12-14 09:07:18,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:07:18,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773311775] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:18,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:07:18,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-12-14 09:07:18,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588027211] [2022-12-14 09:07:18,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:18,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:18,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:07:18,786 INFO L87 Difference]: Start difference. First operand 63142 states and 322961 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:19,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:19,328 INFO L93 Difference]: Finished difference Result 51670 states and 269985 transitions. [2022-12-14 09:07:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:19,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-14 09:07:19,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:19,570 INFO L225 Difference]: With dead ends: 51670 [2022-12-14 09:07:19,570 INFO L226 Difference]: Without dead ends: 51670 [2022-12-14 09:07:19,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:07:19,571 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 156 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:19,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 0 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:07:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51670 states. [2022-12-14 09:07:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51670 to 22990. [2022-12-14 09:07:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22990 states, 22960 states have (on average 4.741506968641115) internal successors, (108865), 22989 states have internal predecessors, (108865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22990 states to 22990 states and 108865 transitions. [2022-12-14 09:07:20,463 INFO L78 Accepts]: Start accepts. Automaton has 22990 states and 108865 transitions. Word has length 31 [2022-12-14 09:07:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:20,463 INFO L495 AbstractCegarLoop]: Abstraction has 22990 states and 108865 transitions. [2022-12-14 09:07:20,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 22990 states and 108865 transitions. [2022-12-14 09:07:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:20,466 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:20,466 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:20,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-12-14 09:07:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:20,668 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:20,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:20,669 INFO L85 PathProgramCache]: Analyzing trace with hash -329675095, now seen corresponding path program 1 times [2022-12-14 09:07:20,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:20,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125862407] [2022-12-14 09:07:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:20,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:21,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:21,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125862407] [2022-12-14 09:07:21,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125862407] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:21,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:21,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424862683] [2022-12-14 09:07:21,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:21,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:21,458 INFO L87 Difference]: Start difference. First operand 22990 states and 108865 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:22,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:22,139 INFO L93 Difference]: Finished difference Result 24295 states and 113426 transitions. [2022-12-14 09:07:22,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:22,140 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:22,246 INFO L225 Difference]: With dead ends: 24295 [2022-12-14 09:07:22,246 INFO L226 Difference]: Without dead ends: 24288 [2022-12-14 09:07:22,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:22,247 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:22,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:07:22,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24288 states. [2022-12-14 09:07:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24288 to 23006. [2022-12-14 09:07:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23006 states, 22976 states have (on average 4.739946030640668) internal successors, (108905), 23005 states have internal predecessors, (108905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23006 states to 23006 states and 108905 transitions. [2022-12-14 09:07:22,740 INFO L78 Accepts]: Start accepts. Automaton has 23006 states and 108905 transitions. Word has length 34 [2022-12-14 09:07:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:22,740 INFO L495 AbstractCegarLoop]: Abstraction has 23006 states and 108905 transitions. [2022-12-14 09:07:22,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 23006 states and 108905 transitions. [2022-12-14 09:07:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:22,743 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:22,743 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:22,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-12-14 09:07:22,743 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 698691005, now seen corresponding path program 2 times [2022-12-14 09:07:22,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605828807] [2022-12-14 09:07:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:22,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:23,531 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:23,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:23,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605828807] [2022-12-14 09:07:23,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605828807] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:23,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:23,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:23,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240397961] [2022-12-14 09:07:23,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:23,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:23,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:23,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:23,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:23,533 INFO L87 Difference]: Start difference. First operand 23006 states and 108905 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:24,155 INFO L93 Difference]: Finished difference Result 24549 states and 114343 transitions. [2022-12-14 09:07:24,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:24,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:24,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:24,249 INFO L225 Difference]: With dead ends: 24549 [2022-12-14 09:07:24,249 INFO L226 Difference]: Without dead ends: 24542 [2022-12-14 09:07:24,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:24,249 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:24,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:07:24,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24542 states. [2022-12-14 09:07:24,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24542 to 23010. [2022-12-14 09:07:24,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23010 states, 22980 states have (on average 4.7394255874673625) internal successors, (108912), 23009 states have internal predecessors, (108912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:24,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23010 states to 23010 states and 108912 transitions. [2022-12-14 09:07:24,881 INFO L78 Accepts]: Start accepts. Automaton has 23010 states and 108912 transitions. Word has length 34 [2022-12-14 09:07:24,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:24,881 INFO L495 AbstractCegarLoop]: Abstraction has 23010 states and 108912 transitions. [2022-12-14 09:07:24,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:24,881 INFO L276 IsEmpty]: Start isEmpty. Operand 23010 states and 108912 transitions. [2022-12-14 09:07:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:24,885 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:24,885 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:24,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-12-14 09:07:24,886 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash -838375442, now seen corresponding path program 1 times [2022-12-14 09:07:24,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:24,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568696459] [2022-12-14 09:07:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:24,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-12-14 09:07:25,540 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:25,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568696459] [2022-12-14 09:07:25,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568696459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:25,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703152895] [2022-12-14 09:07:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:25,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:25,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:25,542 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:25,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-14 09:07:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:25,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 36 conjunts are in the unsatisfiable core [2022-12-14 09:07:25,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:25,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-14 09:07:25,826 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:07:25,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-12-14 09:07:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:26,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:26,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 110 [2022-12-14 09:07:26,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 108 [2022-12-14 09:07:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:26,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703152895] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:26,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [896028650] [2022-12-14 09:07:26,451 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:07:26,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:07:26,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 32 [2022-12-14 09:07:26,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287026964] [2022-12-14 09:07:26,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:26,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-12-14 09:07:26,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-12-14 09:07:26,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-12-14 09:07:26,453 INFO L87 Difference]: Start difference. First operand 23010 states and 108912 transitions. Second operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:29,559 INFO L93 Difference]: Finished difference Result 33444 states and 147651 transitions. [2022-12-14 09:07:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-14 09:07:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:29,680 INFO L225 Difference]: With dead ends: 33444 [2022-12-14 09:07:29,680 INFO L226 Difference]: Without dead ends: 33444 [2022-12-14 09:07:29,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=868, Invalid=2212, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 09:07:29,681 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2414 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2101 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2414 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:29,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2414 Valid, 0 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2101 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-12-14 09:07:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33444 states. [2022-12-14 09:07:30,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33444 to 20742. [2022-12-14 09:07:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20742 states, 20712 states have (on average 4.601390498261877) internal successors, (95304), 20741 states have internal predecessors, (95304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:30,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20742 states to 20742 states and 95304 transitions. [2022-12-14 09:07:30,216 INFO L78 Accepts]: Start accepts. Automaton has 20742 states and 95304 transitions. Word has length 34 [2022-12-14 09:07:30,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:30,216 INFO L495 AbstractCegarLoop]: Abstraction has 20742 states and 95304 transitions. [2022-12-14 09:07:30,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:30,216 INFO L276 IsEmpty]: Start isEmpty. Operand 20742 states and 95304 transitions. [2022-12-14 09:07:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:30,219 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:30,219 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:30,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-14 09:07:30,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-12-14 09:07:30,421 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1510728131, now seen corresponding path program 3 times [2022-12-14 09:07:30,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:30,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565886308] [2022-12-14 09:07:30,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:30,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:31,131 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:31,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565886308] [2022-12-14 09:07:31,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565886308] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:31,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:31,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259794713] [2022-12-14 09:07:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:31,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:31,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:31,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:31,132 INFO L87 Difference]: Start difference. First operand 20742 states and 95304 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:31,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:31,811 INFO L93 Difference]: Finished difference Result 39855 states and 182439 transitions. [2022-12-14 09:07:31,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:31,812 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:31,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:31,966 INFO L225 Difference]: With dead ends: 39855 [2022-12-14 09:07:31,966 INFO L226 Difference]: Without dead ends: 39848 [2022-12-14 09:07:31,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:31,967 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:31,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:07:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39848 states. [2022-12-14 09:07:32,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39848 to 20746. [2022-12-14 09:07:32,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20746 states, 20716 states have (on average 4.6012261054257575) internal successors, (95319), 20745 states have internal predecessors, (95319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20746 states to 20746 states and 95319 transitions. [2022-12-14 09:07:32,559 INFO L78 Accepts]: Start accepts. Automaton has 20746 states and 95319 transitions. Word has length 34 [2022-12-14 09:07:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:32,559 INFO L495 AbstractCegarLoop]: Abstraction has 20746 states and 95319 transitions. [2022-12-14 09:07:32,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 20746 states and 95319 transitions. [2022-12-14 09:07:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:32,562 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:32,562 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:32,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-12-14 09:07:32,562 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:32,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1836914777, now seen corresponding path program 4 times [2022-12-14 09:07:32,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:32,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648733218] [2022-12-14 09:07:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:32,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:32,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:33,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:33,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648733218] [2022-12-14 09:07:33,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648733218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:33,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:33,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:33,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581180629] [2022-12-14 09:07:33,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:33,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:33,361 INFO L87 Difference]: Start difference. First operand 20746 states and 95319 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:34,660 INFO L93 Difference]: Finished difference Result 55005 states and 254959 transitions. [2022-12-14 09:07:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:07:34,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:34,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:34,892 INFO L225 Difference]: With dead ends: 55005 [2022-12-14 09:07:34,892 INFO L226 Difference]: Without dead ends: 54998 [2022-12-14 09:07:34,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:07:34,893 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:34,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:07:34,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54998 states. [2022-12-14 09:07:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54998 to 20748. [2022-12-14 09:07:35,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20748 states, 20718 states have (on average 4.60092673037938) internal successors, (95322), 20747 states have internal predecessors, (95322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20748 states to 20748 states and 95322 transitions. [2022-12-14 09:07:35,631 INFO L78 Accepts]: Start accepts. Automaton has 20748 states and 95322 transitions. Word has length 34 [2022-12-14 09:07:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:35,632 INFO L495 AbstractCegarLoop]: Abstraction has 20748 states and 95322 transitions. [2022-12-14 09:07:35,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:35,632 INFO L276 IsEmpty]: Start isEmpty. Operand 20748 states and 95322 transitions. [2022-12-14 09:07:35,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:35,635 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:35,635 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:35,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-12-14 09:07:35,635 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:35,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1133072997, now seen corresponding path program 5 times [2022-12-14 09:07:35,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:35,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151860783] [2022-12-14 09:07:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:35,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:36,369 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:36,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151860783] [2022-12-14 09:07:36,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151860783] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:36,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:36,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:36,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985096047] [2022-12-14 09:07:36,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:36,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:36,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:36,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:36,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:36,371 INFO L87 Difference]: Start difference. First operand 20748 states and 95322 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:37,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:37,208 INFO L93 Difference]: Finished difference Result 31807 states and 144099 transitions. [2022-12-14 09:07:37,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:37,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:37,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:37,326 INFO L225 Difference]: With dead ends: 31807 [2022-12-14 09:07:37,326 INFO L226 Difference]: Without dead ends: 31800 [2022-12-14 09:07:37,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:37,326 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:37,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 0 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:07:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31800 states. [2022-12-14 09:07:37,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31800 to 20750. [2022-12-14 09:07:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20750 states, 20720 states have (on average 4.600916988416988) internal successors, (95331), 20749 states have internal predecessors, (95331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:37,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 95331 transitions. [2022-12-14 09:07:37,838 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 95331 transitions. Word has length 34 [2022-12-14 09:07:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:37,838 INFO L495 AbstractCegarLoop]: Abstraction has 20750 states and 95331 transitions. [2022-12-14 09:07:37,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 95331 transitions. [2022-12-14 09:07:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-12-14 09:07:37,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:37,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:37,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-12-14 09:07:37,841 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:37,842 INFO L85 PathProgramCache]: Analyzing trace with hash -968647523, now seen corresponding path program 6 times [2022-12-14 09:07:37,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:37,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158674852] [2022-12-14 09:07:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:37,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:38,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158674852] [2022-12-14 09:07:38,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158674852] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:38,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:38,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297118223] [2022-12-14 09:07:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:38,648 INFO L87 Difference]: Start difference. First operand 20750 states and 95331 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:39,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:39,796 INFO L93 Difference]: Finished difference Result 51825 states and 236017 transitions. [2022-12-14 09:07:39,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:07:39,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-12-14 09:07:39,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:40,001 INFO L225 Difference]: With dead ends: 51825 [2022-12-14 09:07:40,001 INFO L226 Difference]: Without dead ends: 51818 [2022-12-14 09:07:40,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:07:40,001 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:40,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:07:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51818 states. [2022-12-14 09:07:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51818 to 20750. [2022-12-14 09:07:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20750 states, 20720 states have (on average 4.600916988416988) internal successors, (95331), 20749 states have internal predecessors, (95331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 95331 transitions. [2022-12-14 09:07:40,776 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 95331 transitions. Word has length 34 [2022-12-14 09:07:40,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:40,777 INFO L495 AbstractCegarLoop]: Abstraction has 20750 states and 95331 transitions. [2022-12-14 09:07:40,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:40,777 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 95331 transitions. [2022-12-14 09:07:40,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:07:40,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:40,780 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:40,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-12-14 09:07:40,780 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:40,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:40,781 INFO L85 PathProgramCache]: Analyzing trace with hash 141315159, now seen corresponding path program 1 times [2022-12-14 09:07:40,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:40,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362201069] [2022-12-14 09:07:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:40,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:40,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:40,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362201069] [2022-12-14 09:07:40,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362201069] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:40,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:40,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476110299] [2022-12-14 09:07:40,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:40,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:07:40,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:40,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:07:40,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:40,881 INFO L87 Difference]: Start difference. First operand 20750 states and 95331 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:41,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:41,157 INFO L93 Difference]: Finished difference Result 21626 states and 98887 transitions. [2022-12-14 09:07:41,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:07:41,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 09:07:41,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:41,229 INFO L225 Difference]: With dead ends: 21626 [2022-12-14 09:07:41,229 INFO L226 Difference]: Without dead ends: 21626 [2022-12-14 09:07:41,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:41,229 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:41,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:41,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21626 states. [2022-12-14 09:07:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21626 to 20750. [2022-12-14 09:07:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20750 states, 20720 states have (on average 4.579777992277992) internal successors, (94893), 20749 states have internal predecessors, (94893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20750 states to 20750 states and 94893 transitions. [2022-12-14 09:07:41,647 INFO L78 Accepts]: Start accepts. Automaton has 20750 states and 94893 transitions. Word has length 35 [2022-12-14 09:07:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:41,647 INFO L495 AbstractCegarLoop]: Abstraction has 20750 states and 94893 transitions. [2022-12-14 09:07:41,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 20750 states and 94893 transitions. [2022-12-14 09:07:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:07:41,650 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:41,650 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:41,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-12-14 09:07:41,650 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:41,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1063492381, now seen corresponding path program 1 times [2022-12-14 09:07:41,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:41,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467330556] [2022-12-14 09:07:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:41,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:41,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467330556] [2022-12-14 09:07:41,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467330556] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:41,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:41,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:41,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758759534] [2022-12-14 09:07:41,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:41,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:07:41,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:41,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:07:41,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:41,750 INFO L87 Difference]: Start difference. First operand 20750 states and 94893 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:42,060 INFO L93 Difference]: Finished difference Result 25922 states and 117951 transitions. [2022-12-14 09:07:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:07:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 09:07:42,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:42,154 INFO L225 Difference]: With dead ends: 25922 [2022-12-14 09:07:42,154 INFO L226 Difference]: Without dead ends: 25922 [2022-12-14 09:07:42,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:42,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:42,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:42,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25922 states. [2022-12-14 09:07:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25922 to 25922. [2022-12-14 09:07:42,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25892 states have (on average 4.555499768268191) internal successors, (117951), 25921 states have internal predecessors, (117951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 117951 transitions. [2022-12-14 09:07:42,704 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 117951 transitions. Word has length 35 [2022-12-14 09:07:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:42,704 INFO L495 AbstractCegarLoop]: Abstraction has 25922 states and 117951 transitions. [2022-12-14 09:07:42,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:42,704 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 117951 transitions. [2022-12-14 09:07:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-14 09:07:42,707 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:42,708 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:42,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-12-14 09:07:42,708 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash 2027850325, now seen corresponding path program 1 times [2022-12-14 09:07:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827568635] [2022-12-14 09:07:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:42,804 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:42,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:42,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827568635] [2022-12-14 09:07:42,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827568635] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:42,804 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:42,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:42,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767421045] [2022-12-14 09:07:42,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:42,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:07:42,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:42,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:07:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:42,805 INFO L87 Difference]: Start difference. First operand 25922 states and 117951 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:43,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:43,114 INFO L93 Difference]: Finished difference Result 26866 states and 121843 transitions. [2022-12-14 09:07:43,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:07:43,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-12-14 09:07:43,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:43,213 INFO L225 Difference]: With dead ends: 26866 [2022-12-14 09:07:43,213 INFO L226 Difference]: Without dead ends: 26866 [2022-12-14 09:07:43,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:07:43,213 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:43,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 0 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:43,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26866 states. [2022-12-14 09:07:43,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26866 to 25922. [2022-12-14 09:07:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25892 states have (on average 4.537270199289356) internal successors, (117479), 25921 states have internal predecessors, (117479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 117479 transitions. [2022-12-14 09:07:43,786 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 117479 transitions. Word has length 35 [2022-12-14 09:07:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:43,786 INFO L495 AbstractCegarLoop]: Abstraction has 25922 states and 117479 transitions. [2022-12-14 09:07:43,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 117479 transitions. [2022-12-14 09:07:43,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 09:07:43,790 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:43,790 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:43,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-12-14 09:07:43,790 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:43,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:43,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1400733809, now seen corresponding path program 1 times [2022-12-14 09:07:43,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:43,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098729778] [2022-12-14 09:07:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:43,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:44,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098729778] [2022-12-14 09:07:44,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098729778] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:44,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:44,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342648237] [2022-12-14 09:07:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:07:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:07:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:07:44,020 INFO L87 Difference]: Start difference. First operand 25922 states and 117479 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:44,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:44,340 INFO L93 Difference]: Finished difference Result 27343 states and 122232 transitions. [2022-12-14 09:07:44,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:07:44,341 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 09:07:44,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:44,435 INFO L225 Difference]: With dead ends: 27343 [2022-12-14 09:07:44,435 INFO L226 Difference]: Without dead ends: 27292 [2022-12-14 09:07:44,435 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:07:44,436 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:44,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:44,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27292 states. [2022-12-14 09:07:44,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27292 to 26648. [2022-12-14 09:07:44,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26648 states, 26618 states have (on average 4.50679990983545) internal successors, (119962), 26647 states have internal predecessors, (119962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26648 states to 26648 states and 119962 transitions. [2022-12-14 09:07:44,992 INFO L78 Accepts]: Start accepts. Automaton has 26648 states and 119962 transitions. Word has length 36 [2022-12-14 09:07:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:44,992 INFO L495 AbstractCegarLoop]: Abstraction has 26648 states and 119962 transitions. [2022-12-14 09:07:44,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26648 states and 119962 transitions. [2022-12-14 09:07:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 09:07:44,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:44,997 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:44,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-12-14 09:07:44,997 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:44,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:44,997 INFO L85 PathProgramCache]: Analyzing trace with hash -733519673, now seen corresponding path program 1 times [2022-12-14 09:07:44,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:44,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037291472] [2022-12-14 09:07:44,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:44,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:45,355 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037291472] [2022-12-14 09:07:45,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037291472] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:07:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882550651] [2022-12-14 09:07:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:07:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:07:45,356 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:07:45,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-14 09:07:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:45,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-14 09:07:45,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:07:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:45,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:07:45,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 09:07:45,942 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 09:07:45,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882550651] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:07:45,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1568725833] [2022-12-14 09:07:45,943 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:07:45,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:07:45,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-12-14 09:07:45,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054539213] [2022-12-14 09:07:45,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:07:45,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-14 09:07:45,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:45,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-14 09:07:45,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-12-14 09:07:45,945 INFO L87 Difference]: Start difference. First operand 26648 states and 119962 transitions. Second operand has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:47,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:47,334 INFO L93 Difference]: Finished difference Result 44068 states and 189355 transitions. [2022-12-14 09:07:47,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-14 09:07:47,335 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 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 36 [2022-12-14 09:07:47,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:47,492 INFO L225 Difference]: With dead ends: 44068 [2022-12-14 09:07:47,492 INFO L226 Difference]: Without dead ends: 44068 [2022-12-14 09:07:47,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=451, Invalid=1355, Unknown=0, NotChecked=0, Total=1806 [2022-12-14 09:07:47,493 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1064 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1064 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:47,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1064 Valid, 0 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 09:07:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44068 states. [2022-12-14 09:07:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44068 to 29478. [2022-12-14 09:07:48,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29478 states, 29448 states have (on average 4.43643031784841) internal successors, (130644), 29477 states have internal predecessors, (130644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29478 states to 29478 states and 130644 transitions. [2022-12-14 09:07:48,257 INFO L78 Accepts]: Start accepts. Automaton has 29478 states and 130644 transitions. Word has length 36 [2022-12-14 09:07:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:48,257 INFO L495 AbstractCegarLoop]: Abstraction has 29478 states and 130644 transitions. [2022-12-14 09:07:48,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 29478 states and 130644 transitions. [2022-12-14 09:07:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 09:07:48,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:48,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:48,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-12-14 09:07:48,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-12-14 09:07:48,464 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:48,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1964810785, now seen corresponding path program 2 times [2022-12-14 09:07:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252198665] [2022-12-14 09:07:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:48,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:48,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:48,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252198665] [2022-12-14 09:07:48,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252198665] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:48,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:48,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:07:48,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688056696] [2022-12-14 09:07:48,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:48,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:07:48,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:07:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:07:48,738 INFO L87 Difference]: Start difference. First operand 29478 states and 130644 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:49,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:49,150 INFO L93 Difference]: Finished difference Result 30443 states and 133569 transitions. [2022-12-14 09:07:49,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:07:49,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-12-14 09:07:49,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:49,252 INFO L225 Difference]: With dead ends: 30443 [2022-12-14 09:07:49,252 INFO L226 Difference]: Without dead ends: 30400 [2022-12-14 09:07:49,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:49,253 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:49,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:07:49,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30400 states. [2022-12-14 09:07:49,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30400 to 29570. [2022-12-14 09:07:49,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29570 states, 29540 states have (on average 4.434867975626269) internal successors, (131006), 29569 states have internal predecessors, (131006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29570 states to 29570 states and 131006 transitions. [2022-12-14 09:07:49,867 INFO L78 Accepts]: Start accepts. Automaton has 29570 states and 131006 transitions. Word has length 36 [2022-12-14 09:07:49,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:49,867 INFO L495 AbstractCegarLoop]: Abstraction has 29570 states and 131006 transitions. [2022-12-14 09:07:49,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:49,867 INFO L276 IsEmpty]: Start isEmpty. Operand 29570 states and 131006 transitions. [2022-12-14 09:07:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:49,874 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:49,875 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:49,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-12-14 09:07:49,875 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash -2115753588, now seen corresponding path program 1 times [2022-12-14 09:07:49,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:49,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196309053] [2022-12-14 09:07:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:49,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:07:50,333 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:50,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196309053] [2022-12-14 09:07:50,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196309053] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:50,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:50,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:07:50,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097731898] [2022-12-14 09:07:50,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:50,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:07:50,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:50,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:07:50,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:07:50,334 INFO L87 Difference]: Start difference. First operand 29570 states and 131006 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:50,915 INFO L93 Difference]: Finished difference Result 43222 states and 184137 transitions. [2022-12-14 09:07:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:07:50,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:07:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:51,065 INFO L225 Difference]: With dead ends: 43222 [2022-12-14 09:07:51,065 INFO L226 Difference]: Without dead ends: 43222 [2022-12-14 09:07:51,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:07:51,066 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:51,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 0 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:07:51,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43222 states. [2022-12-14 09:07:51,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43222 to 37422. [2022-12-14 09:07:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37422 states, 37398 states have (on average 4.3108454997593455) internal successors, (161217), 37421 states have internal predecessors, (161217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37422 states to 37422 states and 161217 transitions. [2022-12-14 09:07:51,953 INFO L78 Accepts]: Start accepts. Automaton has 37422 states and 161217 transitions. Word has length 40 [2022-12-14 09:07:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:51,953 INFO L495 AbstractCegarLoop]: Abstraction has 37422 states and 161217 transitions. [2022-12-14 09:07:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37422 states and 161217 transitions. [2022-12-14 09:07:51,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:51,963 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:51,963 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:51,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-12-14 09:07:51,963 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 551630146, now seen corresponding path program 1 times [2022-12-14 09:07:51,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:51,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328071700] [2022-12-14 09:07:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:51,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:52,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:52,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328071700] [2022-12-14 09:07:52,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328071700] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:52,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:52,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546134052] [2022-12-14 09:07:52,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:52,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:52,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:52,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:52,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:52,337 INFO L87 Difference]: Start difference. First operand 37422 states and 161217 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:52,817 INFO L93 Difference]: Finished difference Result 38387 states and 163697 transitions. [2022-12-14 09:07:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:07:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:52,947 INFO L225 Difference]: With dead ends: 38387 [2022-12-14 09:07:52,947 INFO L226 Difference]: Without dead ends: 38376 [2022-12-14 09:07:52,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:52,947 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:52,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:07:52,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38376 states. [2022-12-14 09:07:53,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38376 to 37708. [2022-12-14 09:07:53,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37708 states, 37684 states have (on average 4.299543572869122) internal successors, (162024), 37707 states have internal predecessors, (162024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:53,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37708 states to 37708 states and 162024 transitions. [2022-12-14 09:07:53,785 INFO L78 Accepts]: Start accepts. Automaton has 37708 states and 162024 transitions. Word has length 40 [2022-12-14 09:07:53,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:53,785 INFO L495 AbstractCegarLoop]: Abstraction has 37708 states and 162024 transitions. [2022-12-14 09:07:53,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:53,785 INFO L276 IsEmpty]: Start isEmpty. Operand 37708 states and 162024 transitions. [2022-12-14 09:07:53,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:53,795 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:53,795 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:53,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-12-14 09:07:53,795 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:53,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:53,795 INFO L85 PathProgramCache]: Analyzing trace with hash -2022109900, now seen corresponding path program 2 times [2022-12-14 09:07:53,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:53,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194647037] [2022-12-14 09:07:53,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:53,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:53,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:54,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:54,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194647037] [2022-12-14 09:07:54,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194647037] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:54,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:54,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:54,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539730078] [2022-12-14 09:07:54,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:54,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:54,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:54,199 INFO L87 Difference]: Start difference. First operand 37708 states and 162024 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:54,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:54,782 INFO L93 Difference]: Finished difference Result 45257 states and 185906 transitions. [2022-12-14 09:07:54,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:54,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:07:54,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:54,933 INFO L225 Difference]: With dead ends: 45257 [2022-12-14 09:07:54,933 INFO L226 Difference]: Without dead ends: 45246 [2022-12-14 09:07:54,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:54,934 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:54,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 0 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:07:54,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45246 states. [2022-12-14 09:07:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45246 to 37802. [2022-12-14 09:07:55,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37802 states, 37778 states have (on average 4.298930594525914) internal successors, (162405), 37801 states have internal predecessors, (162405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:55,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37802 states to 37802 states and 162405 transitions. [2022-12-14 09:07:55,820 INFO L78 Accepts]: Start accepts. Automaton has 37802 states and 162405 transitions. Word has length 40 [2022-12-14 09:07:55,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:55,821 INFO L495 AbstractCegarLoop]: Abstraction has 37802 states and 162405 transitions. [2022-12-14 09:07:55,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:55,821 INFO L276 IsEmpty]: Start isEmpty. Operand 37802 states and 162405 transitions. [2022-12-14 09:07:55,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:55,830 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:55,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:55,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-12-14 09:07:55,831 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:55,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1409141500, now seen corresponding path program 3 times [2022-12-14 09:07:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:55,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232869748] [2022-12-14 09:07:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:55,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:55,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:56,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232869748] [2022-12-14 09:07:56,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232869748] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:56,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:56,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:56,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757586064] [2022-12-14 09:07:56,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:56,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:56,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:56,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:56,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:56,199 INFO L87 Difference]: Start difference. First operand 37802 states and 162405 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:56,749 INFO L93 Difference]: Finished difference Result 38819 states and 165252 transitions. [2022-12-14 09:07:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:07:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:07:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:56,886 INFO L225 Difference]: With dead ends: 38819 [2022-12-14 09:07:56,886 INFO L226 Difference]: Without dead ends: 38808 [2022-12-14 09:07:56,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:07:56,886 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:56,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 0 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:07:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38808 states. [2022-12-14 09:07:57,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38808 to 37802. [2022-12-14 09:07:57,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37802 states, 37778 states have (on average 4.298930594525914) internal successors, (162405), 37801 states have internal predecessors, (162405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:57,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37802 states to 37802 states and 162405 transitions. [2022-12-14 09:07:57,760 INFO L78 Accepts]: Start accepts. Automaton has 37802 states and 162405 transitions. Word has length 40 [2022-12-14 09:07:57,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:57,761 INFO L495 AbstractCegarLoop]: Abstraction has 37802 states and 162405 transitions. [2022-12-14 09:07:57,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:57,761 INFO L276 IsEmpty]: Start isEmpty. Operand 37802 states and 162405 transitions. [2022-12-14 09:07:57,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:57,770 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:57,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-12-14 09:07:57,771 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:57,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1857086520, now seen corresponding path program 4 times [2022-12-14 09:07:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:57,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56984458] [2022-12-14 09:07:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:57,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:57,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:07:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:07:58,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:07:58,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56984458] [2022-12-14 09:07:58,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56984458] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:07:58,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:07:58,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:07:58,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210804657] [2022-12-14 09:07:58,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:07:58,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:07:58,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:07:58,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:07:58,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:07:58,216 INFO L87 Difference]: Start difference. First operand 37802 states and 162405 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:58,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:07:58,902 INFO L93 Difference]: Finished difference Result 39623 states and 167469 transitions. [2022-12-14 09:07:58,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:07:58,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:07:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:07:59,039 INFO L225 Difference]: With dead ends: 39623 [2022-12-14 09:07:59,039 INFO L226 Difference]: Without dead ends: 39612 [2022-12-14 09:07:59,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:07:59,040 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:07:59,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 0 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:07:59,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39612 states. [2022-12-14 09:07:59,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39612 to 37804. [2022-12-14 09:07:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37804 states, 37780 states have (on average 4.298782424563261) internal successors, (162408), 37803 states have internal predecessors, (162408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:59,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37804 states to 37804 states and 162408 transitions. [2022-12-14 09:07:59,891 INFO L78 Accepts]: Start accepts. Automaton has 37804 states and 162408 transitions. Word has length 40 [2022-12-14 09:07:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:07:59,891 INFO L495 AbstractCegarLoop]: Abstraction has 37804 states and 162408 transitions. [2022-12-14 09:07:59,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:07:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand 37804 states and 162408 transitions. [2022-12-14 09:07:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:07:59,901 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:07:59,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:07:59,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-12-14 09:07:59,901 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:07:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:07:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1588340092, now seen corresponding path program 5 times [2022-12-14 09:07:59,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:07:59,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710596174] [2022-12-14 09:07:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:07:59,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:07:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:00,315 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:00,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710596174] [2022-12-14 09:08:00,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710596174] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:00,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:00,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:00,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264758154] [2022-12-14 09:08:00,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:00,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:08:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:00,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:08:00,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:08:00,316 INFO L87 Difference]: Start difference. First operand 37804 states and 162408 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:01,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:01,010 INFO L93 Difference]: Finished difference Result 46511 states and 189728 transitions. [2022-12-14 09:08:01,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:08:01,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:08:01,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:01,164 INFO L225 Difference]: With dead ends: 46511 [2022-12-14 09:08:01,164 INFO L226 Difference]: Without dead ends: 46500 [2022-12-14 09:08:01,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:08:01,165 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:01,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:08:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46500 states. [2022-12-14 09:08:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46500 to 37804. [2022-12-14 09:08:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37804 states, 37780 states have (on average 4.298782424563261) internal successors, (162408), 37803 states have internal predecessors, (162408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:02,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37804 states to 37804 states and 162408 transitions. [2022-12-14 09:08:02,067 INFO L78 Accepts]: Start accepts. Automaton has 37804 states and 162408 transitions. Word has length 40 [2022-12-14 09:08:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 37804 states and 162408 transitions. [2022-12-14 09:08:02,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:02,068 INFO L276 IsEmpty]: Start isEmpty. Operand 37804 states and 162408 transitions. [2022-12-14 09:08:02,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 09:08:02,077 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:02,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:02,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-12-14 09:08:02,078 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:02,078 INFO L85 PathProgramCache]: Analyzing trace with hash 60867578, now seen corresponding path program 6 times [2022-12-14 09:08:02,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:02,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459490601] [2022-12-14 09:08:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:02,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:02,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:02,445 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:02,445 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459490601] [2022-12-14 09:08:02,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459490601] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:02,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:02,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:02,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250608908] [2022-12-14 09:08:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:02,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 09:08:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 09:08:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:08:02,446 INFO L87 Difference]: Start difference. First operand 37804 states and 162408 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:03,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:03,040 INFO L93 Difference]: Finished difference Result 52177 states and 208480 transitions. [2022-12-14 09:08:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:08:03,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 09:08:03,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:03,222 INFO L225 Difference]: With dead ends: 52177 [2022-12-14 09:08:03,222 INFO L226 Difference]: Without dead ends: 52166 [2022-12-14 09:08:03,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:08:03,223 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:03,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:08:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52166 states. [2022-12-14 09:08:04,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52166 to 37804. [2022-12-14 09:08:04,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37804 states, 37780 states have (on average 4.298782424563261) internal successors, (162408), 37803 states have internal predecessors, (162408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:04,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37804 states to 37804 states and 162408 transitions. [2022-12-14 09:08:04,252 INFO L78 Accepts]: Start accepts. Automaton has 37804 states and 162408 transitions. Word has length 40 [2022-12-14 09:08:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:04,253 INFO L495 AbstractCegarLoop]: Abstraction has 37804 states and 162408 transitions. [2022-12-14 09:08:04,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 37804 states and 162408 transitions. [2022-12-14 09:08:04,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 09:08:04,262 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:04,262 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:04,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-12-14 09:08:04,262 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:04,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1124606018, now seen corresponding path program 1 times [2022-12-14 09:08:04,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:04,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231417935] [2022-12-14 09:08:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:04,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:04,438 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:04,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:04,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231417935] [2022-12-14 09:08:04,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231417935] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:04,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:04,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-14 09:08:04,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670873676] [2022-12-14 09:08:04,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:04,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:04,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:04,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:04,439 INFO L87 Difference]: Start difference. First operand 37804 states and 162408 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:04,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:04,792 INFO L93 Difference]: Finished difference Result 39381 states and 166797 transitions. [2022-12-14 09:08:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:04,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 09:08:04,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:04,926 INFO L225 Difference]: With dead ends: 39381 [2022-12-14 09:08:04,926 INFO L226 Difference]: Without dead ends: 39346 [2022-12-14 09:08:04,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:04,926 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:04,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:08:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39346 states. [2022-12-14 09:08:05,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39346 to 38098. [2022-12-14 09:08:05,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38098 states, 38074 states have (on average 4.292404265377948) internal successors, (163429), 38097 states have internal predecessors, (163429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38098 states to 38098 states and 163429 transitions. [2022-12-14 09:08:05,754 INFO L78 Accepts]: Start accepts. Automaton has 38098 states and 163429 transitions. Word has length 41 [2022-12-14 09:08:05,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:05,754 INFO L495 AbstractCegarLoop]: Abstraction has 38098 states and 163429 transitions. [2022-12-14 09:08:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:05,754 INFO L276 IsEmpty]: Start isEmpty. Operand 38098 states and 163429 transitions. [2022-12-14 09:08:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-14 09:08:05,764 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:05,765 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:05,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-12-14 09:08:05,765 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:05,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:05,765 INFO L85 PathProgramCache]: Analyzing trace with hash -839951114, now seen corresponding path program 2 times [2022-12-14 09:08:05,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:05,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927993780] [2022-12-14 09:08:05,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:05,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:05,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:05,943 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:05,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927993780] [2022-12-14 09:08:05,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927993780] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:08:05,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534845029] [2022-12-14 09:08:05,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:08:05,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:05,944 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:05,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-14 09:08:06,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:08:06,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:08:06,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:08:06,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:06,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:08:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:06,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534845029] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:08:06,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [136752723] [2022-12-14 09:08:06,290 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:08:06,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:08:06,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-14 09:08:06,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220900241] [2022-12-14 09:08:06,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:08:06,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:08:06,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:06,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:08:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:08:06,291 INFO L87 Difference]: Start difference. First operand 38098 states and 163429 transitions. Second operand has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:06,671 INFO L93 Difference]: Finished difference Result 38997 states and 165876 transitions. [2022-12-14 09:08:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:06,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-12-14 09:08:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:06,899 INFO L225 Difference]: With dead ends: 38997 [2022-12-14 09:08:06,899 INFO L226 Difference]: Without dead ends: 38962 [2022-12-14 09:08:06,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:08:06,900 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:06,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 0 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:06,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38962 states. [2022-12-14 09:08:07,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38962 to 37600. [2022-12-14 09:08:07,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37600 states, 37576 states have (on average 4.3011762827336595) internal successors, (161621), 37599 states have internal predecessors, (161621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37600 states to 37600 states and 161621 transitions. [2022-12-14 09:08:07,675 INFO L78 Accepts]: Start accepts. Automaton has 37600 states and 161621 transitions. Word has length 41 [2022-12-14 09:08:07,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:07,675 INFO L495 AbstractCegarLoop]: Abstraction has 37600 states and 161621 transitions. [2022-12-14 09:08:07,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 12.2) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:07,676 INFO L276 IsEmpty]: Start isEmpty. Operand 37600 states and 161621 transitions. [2022-12-14 09:08:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:08:07,686 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:07,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:07,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-12-14 09:08:07,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:07,887 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:07,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:07,888 INFO L85 PathProgramCache]: Analyzing trace with hash 943221040, now seen corresponding path program 1 times [2022-12-14 09:08:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:07,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084123363] [2022-12-14 09:08:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:08,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:08,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084123363] [2022-12-14 09:08:08,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084123363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:08,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:08,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:08:08,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150452972] [2022-12-14 09:08:08,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:08,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:08:08,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:08,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:08:08,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-14 09:08:08,391 INFO L87 Difference]: Start difference. First operand 37600 states and 161621 transitions. Second operand has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:08,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:08,888 INFO L93 Difference]: Finished difference Result 44296 states and 189160 transitions. [2022-12-14 09:08:08,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:08:08,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 09:08:08,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:09,043 INFO L225 Difference]: With dead ends: 44296 [2022-12-14 09:08:09,043 INFO L226 Difference]: Without dead ends: 44296 [2022-12-14 09:08:09,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:08:09,043 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:09,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:08:09,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44296 states. [2022-12-14 09:08:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44296 to 38936. [2022-12-14 09:08:09,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38936 states, 38912 states have (on average 4.2880602384868425) internal successors, (166857), 38935 states have internal predecessors, (166857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38936 states to 38936 states and 166857 transitions. [2022-12-14 09:08:10,014 INFO L78 Accepts]: Start accepts. Automaton has 38936 states and 166857 transitions. Word has length 42 [2022-12-14 09:08:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:10,014 INFO L495 AbstractCegarLoop]: Abstraction has 38936 states and 166857 transitions. [2022-12-14 09:08:10,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 38936 states and 166857 transitions. [2022-12-14 09:08:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:08:10,025 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:10,025 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:10,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-12-14 09:08:10,026 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1593084944, now seen corresponding path program 2 times [2022-12-14 09:08:10,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754296334] [2022-12-14 09:08:10,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:10,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:10,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754296334] [2022-12-14 09:08:10,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754296334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:10,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:10,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799502057] [2022-12-14 09:08:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:10,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:10,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:10,266 INFO L87 Difference]: Start difference. First operand 38936 states and 166857 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:10,645 INFO L93 Difference]: Finished difference Result 39600 states and 168605 transitions. [2022-12-14 09:08:10,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:10,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 09:08:10,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:10,780 INFO L225 Difference]: With dead ends: 39600 [2022-12-14 09:08:10,780 INFO L226 Difference]: Without dead ends: 39584 [2022-12-14 09:08:10,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:08:10,781 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:10,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:10,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39584 states. [2022-12-14 09:08:11,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39584 to 39136. [2022-12-14 09:08:11,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39136 states, 39112 states have (on average 4.278507874821027) internal successors, (167341), 39135 states have internal predecessors, (167341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39136 states to 39136 states and 167341 transitions. [2022-12-14 09:08:11,638 INFO L78 Accepts]: Start accepts. Automaton has 39136 states and 167341 transitions. Word has length 42 [2022-12-14 09:08:11,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:11,639 INFO L495 AbstractCegarLoop]: Abstraction has 39136 states and 167341 transitions. [2022-12-14 09:08:11,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 39136 states and 167341 transitions. [2022-12-14 09:08:11,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:08:11,651 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:11,651 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:11,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-12-14 09:08:11,651 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:11,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:11,651 INFO L85 PathProgramCache]: Analyzing trace with hash -619278366, now seen corresponding path program 3 times [2022-12-14 09:08:11,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:11,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234722767] [2022-12-14 09:08:11,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:11,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:12,352 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234722767] [2022-12-14 09:08:12,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234722767] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:12,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:12,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:08:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789431894] [2022-12-14 09:08:12,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:12,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:08:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:12,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:08:12,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:08:12,353 INFO L87 Difference]: Start difference. First operand 39136 states and 167341 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:13,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:13,342 INFO L93 Difference]: Finished difference Result 76601 states and 322487 transitions. [2022-12-14 09:08:13,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:08:13,343 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 09:08:13,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:13,627 INFO L225 Difference]: With dead ends: 76601 [2022-12-14 09:08:13,627 INFO L226 Difference]: Without dead ends: 76601 [2022-12-14 09:08:13,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:08:13,628 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 189 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:13,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 0 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:08:13,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76601 states. [2022-12-14 09:08:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76601 to 49152. [2022-12-14 09:08:14,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49152 states, 49128 states have (on average 4.286516853932584) internal successors, (210588), 49151 states have internal predecessors, (210588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:15,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49152 states to 49152 states and 210588 transitions. [2022-12-14 09:08:15,033 INFO L78 Accepts]: Start accepts. Automaton has 49152 states and 210588 transitions. Word has length 42 [2022-12-14 09:08:15,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:15,034 INFO L495 AbstractCegarLoop]: Abstraction has 49152 states and 210588 transitions. [2022-12-14 09:08:15,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 49152 states and 210588 transitions. [2022-12-14 09:08:15,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 09:08:15,047 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:15,047 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:15,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-12-14 09:08:15,047 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:15,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:15,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1941566678, now seen corresponding path program 4 times [2022-12-14 09:08:15,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:15,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841960735] [2022-12-14 09:08:15,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:15,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:15,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:15,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:15,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841960735] [2022-12-14 09:08:15,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841960735] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:15,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:15,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977212701] [2022-12-14 09:08:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:15,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:15,295 INFO L87 Difference]: Start difference. First operand 49152 states and 210588 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:15,849 INFO L93 Difference]: Finished difference Result 49966 states and 213248 transitions. [2022-12-14 09:08:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:15,850 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-12-14 09:08:15,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:16,034 INFO L225 Difference]: With dead ends: 49966 [2022-12-14 09:08:16,034 INFO L226 Difference]: Without dead ends: 49966 [2022-12-14 09:08:16,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:16,034 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:16,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49966 states. [2022-12-14 09:08:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49966 to 49538. [2022-12-14 09:08:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49538 states, 49514 states have (on average 4.282768509916387) internal successors, (212057), 49537 states have internal predecessors, (212057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:17,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49538 states to 49538 states and 212057 transitions. [2022-12-14 09:08:17,217 INFO L78 Accepts]: Start accepts. Automaton has 49538 states and 212057 transitions. Word has length 42 [2022-12-14 09:08:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:17,218 INFO L495 AbstractCegarLoop]: Abstraction has 49538 states and 212057 transitions. [2022-12-14 09:08:17,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 49538 states and 212057 transitions. [2022-12-14 09:08:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:08:17,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:17,234 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:17,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-12-14 09:08:17,234 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:17,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:17,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1681304278, now seen corresponding path program 1 times [2022-12-14 09:08:17,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:17,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614797841] [2022-12-14 09:08:17,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:17,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:08:17,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:17,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614797841] [2022-12-14 09:08:17,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614797841] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:17,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:17,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686765927] [2022-12-14 09:08:17,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:17,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:17,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:17,440 INFO L87 Difference]: Start difference. First operand 49538 states and 212057 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:17,960 INFO L93 Difference]: Finished difference Result 49982 states and 213267 transitions. [2022-12-14 09:08:17,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:17,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:08:17,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:18,147 INFO L225 Difference]: With dead ends: 49982 [2022-12-14 09:08:18,148 INFO L226 Difference]: Without dead ends: 49976 [2022-12-14 09:08:18,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 09:08:18,148 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:18,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:18,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49976 states. [2022-12-14 09:08:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49976 to 49538. [2022-12-14 09:08:19,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49538 states, 49514 states have (on average 4.282647332067698) internal successors, (212051), 49537 states have internal predecessors, (212051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49538 states to 49538 states and 212051 transitions. [2022-12-14 09:08:19,439 INFO L78 Accepts]: Start accepts. Automaton has 49538 states and 212051 transitions. Word has length 43 [2022-12-14 09:08:19,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:19,440 INFO L495 AbstractCegarLoop]: Abstraction has 49538 states and 212051 transitions. [2022-12-14 09:08:19,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 49538 states and 212051 transitions. [2022-12-14 09:08:19,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:08:19,456 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:19,456 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:19,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-12-14 09:08:19,456 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:19,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:19,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1788311956, now seen corresponding path program 2 times [2022-12-14 09:08:19,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:19,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461626449] [2022-12-14 09:08:19,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:19,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:08:19,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:19,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461626449] [2022-12-14 09:08:19,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461626449] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:19,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:19,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:19,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842659284] [2022-12-14 09:08:19,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:19,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:19,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:19,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:19,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:19,696 INFO L87 Difference]: Start difference. First operand 49538 states and 212051 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:20,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:20,150 INFO L93 Difference]: Finished difference Result 49982 states and 212877 transitions. [2022-12-14 09:08:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:20,151 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:08:20,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:20,335 INFO L225 Difference]: With dead ends: 49982 [2022-12-14 09:08:20,335 INFO L226 Difference]: Without dead ends: 49982 [2022-12-14 09:08:20,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:20,336 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 112 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:20,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:20,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49982 states. [2022-12-14 09:08:21,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49982 to 49154. [2022-12-14 09:08:21,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49154 states, 49130 states have (on average 4.2777121921432935) internal successors, (210164), 49153 states have internal predecessors, (210164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49154 states to 49154 states and 210164 transitions. [2022-12-14 09:08:21,665 INFO L78 Accepts]: Start accepts. Automaton has 49154 states and 210164 transitions. Word has length 43 [2022-12-14 09:08:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:21,665 INFO L495 AbstractCegarLoop]: Abstraction has 49154 states and 210164 transitions. [2022-12-14 09:08:21,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:21,666 INFO L276 IsEmpty]: Start isEmpty. Operand 49154 states and 210164 transitions. [2022-12-14 09:08:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:08:21,681 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:21,681 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:21,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-12-14 09:08:21,681 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:21,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:21,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1405960472, now seen corresponding path program 3 times [2022-12-14 09:08:21,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:21,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133058969] [2022-12-14 09:08:21,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:21,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:22,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:22,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133058969] [2022-12-14 09:08:22,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133058969] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:08:22,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963670475] [2022-12-14 09:08:22,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:08:22,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:22,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:22,181 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:22,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-12-14 09:08:22,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:08:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:08:22,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 09:08:22,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:08:24,933 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:08:24,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 117 [2022-12-14 09:08:24,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:08:24,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 128 treesize of output 132 [2022-12-14 09:08:24,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:08:24,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 93 [2022-12-14 09:08:25,811 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:25,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:08:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:26,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963670475] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:08:26,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [153202319] [2022-12-14 09:08:26,213 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:08:26,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:08:26,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 10, 5] total 17 [2022-12-14 09:08:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620827647] [2022-12-14 09:08:26,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:08:26,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 09:08:26,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 09:08:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-12-14 09:08:26,214 INFO L87 Difference]: Start difference. First operand 49154 states and 210164 transitions. Second operand has 18 states, 17 states have (on average 4.0) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:38,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:38,460 INFO L93 Difference]: Finished difference Result 123919 states and 515268 transitions. [2022-12-14 09:08:38,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-12-14 09:08:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:08:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:38,970 INFO L225 Difference]: With dead ends: 123919 [2022-12-14 09:08:38,970 INFO L226 Difference]: Without dead ends: 123605 [2022-12-14 09:08:38,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1007, Invalid=4543, Unknown=0, NotChecked=0, Total=5550 [2022-12-14 09:08:38,971 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1237 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4649 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:38,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1237 Valid, 0 Invalid, 4703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4649 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-12-14 09:08:39,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123605 states. [2022-12-14 09:08:40,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123605 to 58237. [2022-12-14 09:08:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58237 states, 58213 states have (on average 4.326147080549018) internal successors, (251838), 58236 states have internal predecessors, (251838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:41,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58237 states to 58237 states and 251838 transitions. [2022-12-14 09:08:41,251 INFO L78 Accepts]: Start accepts. Automaton has 58237 states and 251838 transitions. Word has length 43 [2022-12-14 09:08:41,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:41,251 INFO L495 AbstractCegarLoop]: Abstraction has 58237 states and 251838 transitions. [2022-12-14 09:08:41,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.0) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:41,251 INFO L276 IsEmpty]: Start isEmpty. Operand 58237 states and 251838 transitions. [2022-12-14 09:08:41,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:08:41,272 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:41,272 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:41,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-12-14 09:08:41,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-12-14 09:08:41,473 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2108467186, now seen corresponding path program 1 times [2022-12-14 09:08:41,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019382465] [2022-12-14 09:08:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:41,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:41,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:41,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019382465] [2022-12-14 09:08:41,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019382465] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:41,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:41,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:41,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912240088] [2022-12-14 09:08:41,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:41,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:41,718 INFO L87 Difference]: Start difference. First operand 58237 states and 251838 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:42,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:42,632 INFO L93 Difference]: Finished difference Result 93664 states and 396017 transitions. [2022-12-14 09:08:42,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:42,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:08:42,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:43,168 INFO L225 Difference]: With dead ends: 93664 [2022-12-14 09:08:43,168 INFO L226 Difference]: Without dead ends: 93462 [2022-12-14 09:08:43,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:43,169 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:43,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 0 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:43,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93462 states. [2022-12-14 09:08:44,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93462 to 63393. [2022-12-14 09:08:44,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63393 states, 63366 states have (on average 4.341492282927753) internal successors, (275103), 63392 states have internal predecessors, (275103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63393 states to 63393 states and 275103 transitions. [2022-12-14 09:08:45,074 INFO L78 Accepts]: Start accepts. Automaton has 63393 states and 275103 transitions. Word has length 43 [2022-12-14 09:08:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:45,074 INFO L495 AbstractCegarLoop]: Abstraction has 63393 states and 275103 transitions. [2022-12-14 09:08:45,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 63393 states and 275103 transitions. [2022-12-14 09:08:45,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-14 09:08:45,098 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:45,098 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:45,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-12-14 09:08:45,098 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:45,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:45,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1779801392, now seen corresponding path program 4 times [2022-12-14 09:08:45,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:45,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097853102] [2022-12-14 09:08:45,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:45,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:45,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:45,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097853102] [2022-12-14 09:08:45,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097853102] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:45,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:45,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:45,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928066540] [2022-12-14 09:08:45,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:45,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:45,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:45,351 INFO L87 Difference]: Start difference. First operand 63393 states and 275103 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:45,986 INFO L93 Difference]: Finished difference Result 63925 states and 276271 transitions. [2022-12-14 09:08:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:45,987 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-12-14 09:08:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:46,221 INFO L225 Difference]: With dead ends: 63925 [2022-12-14 09:08:46,221 INFO L226 Difference]: Without dead ends: 63909 [2022-12-14 09:08:46,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:46,221 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:46,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:46,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63909 states. [2022-12-14 09:08:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63909 to 63094. [2022-12-14 09:08:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63094 states, 63067 states have (on average 4.34720218180665) internal successors, (274165), 63093 states have internal predecessors, (274165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63094 states to 63094 states and 274165 transitions. [2022-12-14 09:08:47,786 INFO L78 Accepts]: Start accepts. Automaton has 63094 states and 274165 transitions. Word has length 43 [2022-12-14 09:08:47,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:47,786 INFO L495 AbstractCegarLoop]: Abstraction has 63094 states and 274165 transitions. [2022-12-14 09:08:47,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:47,787 INFO L276 IsEmpty]: Start isEmpty. Operand 63094 states and 274165 transitions. [2022-12-14 09:08:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-12-14 09:08:47,922 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:47,923 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:47,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-12-14 09:08:47,923 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1084818541, now seen corresponding path program 1 times [2022-12-14 09:08:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:47,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106143188] [2022-12-14 09:08:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:48,282 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:08:48,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:48,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106143188] [2022-12-14 09:08:48,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106143188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:48,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:48,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:08:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350290070] [2022-12-14 09:08:48,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:08:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:08:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:48,284 INFO L87 Difference]: Start difference. First operand 63094 states and 274165 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:48,931 INFO L93 Difference]: Finished difference Result 63110 states and 274179 transitions. [2022-12-14 09:08:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:08:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-12-14 09:08:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:49,177 INFO L225 Difference]: With dead ends: 63110 [2022-12-14 09:08:49,177 INFO L226 Difference]: Without dead ends: 63104 [2022-12-14 09:08:49,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:08:49,177 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:49,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:08:49,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63104 states. [2022-12-14 09:08:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63104 to 63094. [2022-12-14 09:08:50,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63094 states, 63067 states have (on average 4.34717046950069) internal successors, (274163), 63093 states have internal predecessors, (274163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63094 states to 63094 states and 274163 transitions. [2022-12-14 09:08:50,807 INFO L78 Accepts]: Start accepts. Automaton has 63094 states and 274163 transitions. Word has length 44 [2022-12-14 09:08:50,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:50,807 INFO L495 AbstractCegarLoop]: Abstraction has 63094 states and 274163 transitions. [2022-12-14 09:08:50,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 63094 states and 274163 transitions. [2022-12-14 09:08:50,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 09:08:50,839 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:50,839 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:50,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-12-14 09:08:50,839 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:50,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:50,839 INFO L85 PathProgramCache]: Analyzing trace with hash -943812577, now seen corresponding path program 1 times [2022-12-14 09:08:50,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:50,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816795680] [2022-12-14 09:08:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:50,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:51,982 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:51,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:51,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816795680] [2022-12-14 09:08:51,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816795680] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:51,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:51,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:08:51,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263752207] [2022-12-14 09:08:51,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:51,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:08:51,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:51,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:08:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:08:51,984 INFO L87 Difference]: Start difference. First operand 63094 states and 274163 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:52,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:52,895 INFO L93 Difference]: Finished difference Result 69422 states and 299172 transitions. [2022-12-14 09:08:52,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:08:52,896 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 09:08:52,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:53,155 INFO L225 Difference]: With dead ends: 69422 [2022-12-14 09:08:53,155 INFO L226 Difference]: Without dead ends: 69422 [2022-12-14 09:08:53,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:08:53,155 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:53,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:08:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69422 states. [2022-12-14 09:08:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69422 to 63228. [2022-12-14 09:08:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63228 states, 63201 states have (on average 4.34497871869116) internal successors, (274607), 63227 states have internal predecessors, (274607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:54,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63228 states to 63228 states and 274607 transitions. [2022-12-14 09:08:54,837 INFO L78 Accepts]: Start accepts. Automaton has 63228 states and 274607 transitions. Word has length 47 [2022-12-14 09:08:54,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:54,837 INFO L495 AbstractCegarLoop]: Abstraction has 63228 states and 274607 transitions. [2022-12-14 09:08:54,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:54,838 INFO L276 IsEmpty]: Start isEmpty. Operand 63228 states and 274607 transitions. [2022-12-14 09:08:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 09:08:54,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:54,871 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-12-14 09:08:54,871 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -332285527, now seen corresponding path program 2 times [2022-12-14 09:08:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644975405] [2022-12-14 09:08:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:08:55,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:55,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644975405] [2022-12-14 09:08:55,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644975405] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:08:55,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:08:55,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:08:55,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99643327] [2022-12-14 09:08:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:08:55,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:08:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:08:55,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:08:55,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:08:55,925 INFO L87 Difference]: Start difference. First operand 63228 states and 274607 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:56,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:08:56,745 INFO L93 Difference]: Finished difference Result 68220 states and 294403 transitions. [2022-12-14 09:08:56,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:08:56,746 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-12-14 09:08:56,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:08:57,002 INFO L225 Difference]: With dead ends: 68220 [2022-12-14 09:08:57,002 INFO L226 Difference]: Without dead ends: 68220 [2022-12-14 09:08:57,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:08:57,003 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 137 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:08:57,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 0 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:08:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68220 states. [2022-12-14 09:08:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68220 to 63094. [2022-12-14 09:08:58,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63094 states, 63067 states have (on average 4.34717046950069) internal successors, (274163), 63093 states have internal predecessors, (274163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63094 states to 63094 states and 274163 transitions. [2022-12-14 09:08:59,130 INFO L78 Accepts]: Start accepts. Automaton has 63094 states and 274163 transitions. Word has length 47 [2022-12-14 09:08:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:08:59,130 INFO L495 AbstractCegarLoop]: Abstraction has 63094 states and 274163 transitions. [2022-12-14 09:08:59,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:08:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 63094 states and 274163 transitions. [2022-12-14 09:08:59,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:08:59,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:08:59,164 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:08:59,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-12-14 09:08:59,164 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:08:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:08:59,165 INFO L85 PathProgramCache]: Analyzing trace with hash 113240167, now seen corresponding path program 1 times [2022-12-14 09:08:59,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:08:59,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955012092] [2022-12-14 09:08:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:59,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:08:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:08:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:08:59,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:08:59,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955012092] [2022-12-14 09:08:59,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955012092] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:08:59,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556512355] [2022-12-14 09:08:59,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:08:59,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:08:59,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:08:59,926 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:08:59,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-12-14 09:09:00,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:00,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:09:00,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:09:00,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:09:00,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556512355] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:00,353 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:09:00,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-12-14 09:09:00,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425567795] [2022-12-14 09:09:00,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:00,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:09:00,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:00,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:09:00,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:09:00,354 INFO L87 Difference]: Start difference. First operand 63094 states and 274163 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:01,146 INFO L93 Difference]: Finished difference Result 95906 states and 393937 transitions. [2022-12-14 09:09:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 09:09:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 48 [2022-12-14 09:09:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:01,514 INFO L225 Difference]: With dead ends: 95906 [2022-12-14 09:09:01,514 INFO L226 Difference]: Without dead ends: 95906 [2022-12-14 09:09:01,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:09:01,515 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:01,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:09:01,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95906 states. [2022-12-14 09:09:03,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95906 to 83930. [2022-12-14 09:09:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83930 states, 83903 states have (on average 4.236570801997545) internal successors, (355461), 83929 states have internal predecessors, (355461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83930 states to 83930 states and 355461 transitions. [2022-12-14 09:09:04,139 INFO L78 Accepts]: Start accepts. Automaton has 83930 states and 355461 transitions. Word has length 48 [2022-12-14 09:09:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:04,139 INFO L495 AbstractCegarLoop]: Abstraction has 83930 states and 355461 transitions. [2022-12-14 09:09:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 83930 states and 355461 transitions. [2022-12-14 09:09:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:09:04,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:04,187 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:04,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-12-14 09:09:04,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-12-14 09:09:04,389 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1403174173, now seen corresponding path program 2 times [2022-12-14 09:09:04,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327960666] [2022-12-14 09:09:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:04,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:09:05,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:05,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327960666] [2022-12-14 09:09:05,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327960666] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:05,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786175565] [2022-12-14 09:09:05,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:09:05,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:05,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:05,194 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:05,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-12-14 09:09:05,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:09:05,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:09:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:09:05,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:09:05,485 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:09:05,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786175565] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:05,485 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:09:05,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 13 [2022-12-14 09:09:05,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669287427] [2022-12-14 09:09:05,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:05,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:09:05,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:09:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:09:05,486 INFO L87 Difference]: Start difference. First operand 83930 states and 355461 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:06,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:06,349 INFO L93 Difference]: Finished difference Result 95984 states and 393976 transitions. [2022-12-14 09:09:06,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:09:06,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 48 [2022-12-14 09:09:06,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:06,707 INFO L225 Difference]: With dead ends: 95984 [2022-12-14 09:09:06,707 INFO L226 Difference]: Without dead ends: 95970 [2022-12-14 09:09:06,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:09:06,708 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:06,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:09:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95970 states. [2022-12-14 09:09:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95970 to 83996. [2022-12-14 09:09:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83996 states, 83969 states have (on average 4.234324572163537) internal successors, (355552), 83995 states have internal predecessors, (355552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:09,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83996 states to 83996 states and 355552 transitions. [2022-12-14 09:09:09,166 INFO L78 Accepts]: Start accepts. Automaton has 83996 states and 355552 transitions. Word has length 48 [2022-12-14 09:09:09,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:09,166 INFO L495 AbstractCegarLoop]: Abstraction has 83996 states and 355552 transitions. [2022-12-14 09:09:09,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 83996 states and 355552 transitions. [2022-12-14 09:09:09,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:09:09,214 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:09,214 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:09,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-12-14 09:09:09,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:09,415 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -516843433, now seen corresponding path program 3 times [2022-12-14 09:09:09,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:09,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092953631] [2022-12-14 09:09:09,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:09,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:09:09,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:09,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092953631] [2022-12-14 09:09:09,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092953631] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:09,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:09:09,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:09:09,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667780442] [2022-12-14 09:09:09,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:09,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:09:09,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:09,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:09:09,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:09:09,727 INFO L87 Difference]: Start difference. First operand 83996 states and 355552 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:10,608 INFO L93 Difference]: Finished difference Result 93346 states and 374563 transitions. [2022-12-14 09:09:10,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:09:10,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 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 48 [2022-12-14 09:09:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:10,956 INFO L225 Difference]: With dead ends: 93346 [2022-12-14 09:09:10,956 INFO L226 Difference]: Without dead ends: 93346 [2022-12-14 09:09:10,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:09:10,956 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:10,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:09:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93346 states. [2022-12-14 09:09:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93346 to 63852. [2022-12-14 09:09:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63852 states, 63825 states have (on average 4.145663924794359) internal successors, (264597), 63851 states have internal predecessors, (264597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:12,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63852 states to 63852 states and 264597 transitions. [2022-12-14 09:09:12,885 INFO L78 Accepts]: Start accepts. Automaton has 63852 states and 264597 transitions. Word has length 48 [2022-12-14 09:09:12,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:12,885 INFO L495 AbstractCegarLoop]: Abstraction has 63852 states and 264597 transitions. [2022-12-14 09:09:12,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:12,885 INFO L276 IsEmpty]: Start isEmpty. Operand 63852 states and 264597 transitions. [2022-12-14 09:09:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-14 09:09:12,920 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:12,920 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:12,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-12-14 09:09:12,920 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:12,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:12,920 INFO L85 PathProgramCache]: Analyzing trace with hash -646423949, now seen corresponding path program 2 times [2022-12-14 09:09:12,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:12,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838375734] [2022-12-14 09:09:12,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:12,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-12-14 09:09:13,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838375734] [2022-12-14 09:09:13,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838375734] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:13,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259649425] [2022-12-14 09:09:13,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:09:13,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:13,736 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:13,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-12-14 09:09:13,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:09:13,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:09:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 09:09:13,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:14,030 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:09:14,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:09:14,060 INFO L321 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-12-14 09:09:14,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 42 [2022-12-14 09:09:14,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:09:14,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:09:14,119 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-14 09:09:14,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-14 09:09:14,145 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-14 09:09:14,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-12-14 09:09:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-12-14 09:09:14,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:09:14,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259649425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:14,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:09:14,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 15 [2022-12-14 09:09:14,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834345913] [2022-12-14 09:09:14,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:14,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:09:14,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:14,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:09:14,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:09:14,245 INFO L87 Difference]: Start difference. First operand 63852 states and 264597 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:14,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:14,996 INFO L93 Difference]: Finished difference Result 63994 states and 263923 transitions. [2022-12-14 09:09:14,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:09:14,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-14 09:09:14,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:15,251 INFO L225 Difference]: With dead ends: 63994 [2022-12-14 09:09:15,251 INFO L226 Difference]: Without dead ends: 63994 [2022-12-14 09:09:15,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-12-14 09:09:15,251 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 165 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:15,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:09:15,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63994 states. [2022-12-14 09:09:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63994 to 63053. [2022-12-14 09:09:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63053 states, 63033 states have (on average 4.1313280345216) internal successors, (260410), 63052 states have internal predecessors, (260410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63053 states to 63053 states and 260410 transitions. [2022-12-14 09:09:16,851 INFO L78 Accepts]: Start accepts. Automaton has 63053 states and 260410 transitions. Word has length 48 [2022-12-14 09:09:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:16,851 INFO L495 AbstractCegarLoop]: Abstraction has 63053 states and 260410 transitions. [2022-12-14 09:09:16,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 63053 states and 260410 transitions. [2022-12-14 09:09:16,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:16,888 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:16,888 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:16,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-12-14 09:09:17,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-12-14 09:09:17,090 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:17,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash 34022204, now seen corresponding path program 1 times [2022-12-14 09:09:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:17,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94394009] [2022-12-14 09:09:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:18,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94394009] [2022-12-14 09:09:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94394009] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531481268] [2022-12-14 09:09:18,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:18,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:18,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:18,022 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:18,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-12-14 09:09:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:18,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:09:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:18,510 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:18,901 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:09:18,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 94 [2022-12-14 09:09:18,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 09:09:18,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2022-12-14 09:09:18,974 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:18,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531481268] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:09:18,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1814965383] [2022-12-14 09:09:18,975 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:09:18,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:09:18,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 9] total 27 [2022-12-14 09:09:18,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97213460] [2022-12-14 09:09:18,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:09:18,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-12-14 09:09:18,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-12-14 09:09:18,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-12-14 09:09:18,976 INFO L87 Difference]: Start difference. First operand 63053 states and 260410 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:26,649 INFO L93 Difference]: Finished difference Result 145439 states and 576776 transitions. [2022-12-14 09:09:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-12-14 09:09:26,650 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:26,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:27,316 INFO L225 Difference]: With dead ends: 145439 [2022-12-14 09:09:27,316 INFO L226 Difference]: Without dead ends: 145379 [2022-12-14 09:09:27,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4959 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3088, Invalid=12164, Unknown=0, NotChecked=0, Total=15252 [2022-12-14 09:09:27,318 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1543 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3636 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:27,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1543 Valid, 0 Invalid, 3755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3636 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-12-14 09:09:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145379 states. [2022-12-14 09:09:29,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145379 to 61372. [2022-12-14 09:09:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61372 states, 61350 states have (on average 4.092159739201304) internal successors, (251054), 61371 states have internal predecessors, (251054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:29,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61372 states to 61372 states and 251054 transitions. [2022-12-14 09:09:29,546 INFO L78 Accepts]: Start accepts. Automaton has 61372 states and 251054 transitions. Word has length 49 [2022-12-14 09:09:29,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:29,547 INFO L495 AbstractCegarLoop]: Abstraction has 61372 states and 251054 transitions. [2022-12-14 09:09:29,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:29,547 INFO L276 IsEmpty]: Start isEmpty. Operand 61372 states and 251054 transitions. [2022-12-14 09:09:29,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:29,583 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:29,583 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:29,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-12-14 09:09:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-12-14 09:09:29,786 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:29,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:29,788 INFO L85 PathProgramCache]: Analyzing trace with hash 210828934, now seen corresponding path program 2 times [2022-12-14 09:09:29,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:29,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581601144] [2022-12-14 09:09:29,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:29,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:30,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:30,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:30,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581601144] [2022-12-14 09:09:30,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581601144] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:30,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701688510] [2022-12-14 09:09:30,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:09:30,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:30,393 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:30,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-12-14 09:09:30,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-12-14 09:09:30,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:09:30,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-14 09:09:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:09:30,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 09:09:30,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701688510] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:30,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 09:09:30,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2022-12-14 09:09:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8691342] [2022-12-14 09:09:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:09:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:09:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:09:30,683 INFO L87 Difference]: Start difference. First operand 61372 states and 251054 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:31,363 INFO L93 Difference]: Finished difference Result 62436 states and 254071 transitions. [2022-12-14 09:09:31,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:09:31,364 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:31,583 INFO L225 Difference]: With dead ends: 62436 [2022-12-14 09:09:31,583 INFO L226 Difference]: Without dead ends: 62424 [2022-12-14 09:09:31,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:09:31,584 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:31,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:09:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62424 states. [2022-12-14 09:09:32,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62424 to 61780. [2022-12-14 09:09:32,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61780 states, 61758 states have (on average 4.082871854658506) internal successors, (252150), 61779 states have internal predecessors, (252150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61780 states to 61780 states and 252150 transitions. [2022-12-14 09:09:32,995 INFO L78 Accepts]: Start accepts. Automaton has 61780 states and 252150 transitions. Word has length 49 [2022-12-14 09:09:32,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:32,995 INFO L495 AbstractCegarLoop]: Abstraction has 61780 states and 252150 transitions. [2022-12-14 09:09:32,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 61780 states and 252150 transitions. [2022-12-14 09:09:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:33,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:33,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:33,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-12-14 09:09:33,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-12-14 09:09:33,234 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:33,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1938954872, now seen corresponding path program 3 times [2022-12-14 09:09:33,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:33,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549373459] [2022-12-14 09:09:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:33,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:33,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549373459] [2022-12-14 09:09:33,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549373459] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:33,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797432453] [2022-12-14 09:09:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:09:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:33,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:33,783 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:33,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-12-14 09:09:34,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:09:34,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:09:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-14 09:09:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:34,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-12-14 09:09:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:34,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:34,582 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:09:34,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-12-14 09:09:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:34,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797432453] provided 1 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:34,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-12-14 09:09:34,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 16 [2022-12-14 09:09:34,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348739305] [2022-12-14 09:09:34,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:34,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 09:09:34,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:34,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 09:09:34,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:09:34,598 INFO L87 Difference]: Start difference. First operand 61780 states and 252150 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:36,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:36,171 INFO L93 Difference]: Finished difference Result 146955 states and 587346 transitions. [2022-12-14 09:09:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 09:09:36,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:36,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:36,723 INFO L225 Difference]: With dead ends: 146955 [2022-12-14 09:09:36,723 INFO L226 Difference]: Without dead ends: 146775 [2022-12-14 09:09:36,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2022-12-14 09:09:36,724 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 210 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:36,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 0 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:09:36,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146775 states. [2022-12-14 09:09:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146775 to 62440. [2022-12-14 09:09:38,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62440 states, 62418 states have (on average 4.081579031689577) internal successors, (254764), 62439 states have internal predecessors, (254764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:39,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62440 states to 62440 states and 254764 transitions. [2022-12-14 09:09:39,035 INFO L78 Accepts]: Start accepts. Automaton has 62440 states and 254764 transitions. Word has length 49 [2022-12-14 09:09:39,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:39,035 INFO L495 AbstractCegarLoop]: Abstraction has 62440 states and 254764 transitions. [2022-12-14 09:09:39,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:39,035 INFO L276 IsEmpty]: Start isEmpty. Operand 62440 states and 254764 transitions. [2022-12-14 09:09:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:39,072 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:39,072 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:39,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-12-14 09:09:39,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:39,273 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:39,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2133060644, now seen corresponding path program 4 times [2022-12-14 09:09:39,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:39,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140115297] [2022-12-14 09:09:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:39,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:39,825 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:39,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:39,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140115297] [2022-12-14 09:09:39,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140115297] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:39,825 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:09:39,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:09:39,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679094423] [2022-12-14 09:09:39,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:39,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:09:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:09:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:09:39,826 INFO L87 Difference]: Start difference. First operand 62440 states and 254764 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:40,493 INFO L93 Difference]: Finished difference Result 66415 states and 269328 transitions. [2022-12-14 09:09:40,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:09:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:40,718 INFO L225 Difference]: With dead ends: 66415 [2022-12-14 09:09:40,718 INFO L226 Difference]: Without dead ends: 66415 [2022-12-14 09:09:40,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:09:40,719 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 211 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:40,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 0 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:09:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66415 states. [2022-12-14 09:09:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66415 to 63417. [2022-12-14 09:09:42,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63417 states, 63395 states have (on average 4.075699976338828) internal successors, (258379), 63416 states have internal predecessors, (258379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:42,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63417 states to 63417 states and 258379 transitions. [2022-12-14 09:09:42,474 INFO L78 Accepts]: Start accepts. Automaton has 63417 states and 258379 transitions. Word has length 49 [2022-12-14 09:09:42,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:42,474 INFO L495 AbstractCegarLoop]: Abstraction has 63417 states and 258379 transitions. [2022-12-14 09:09:42,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:42,475 INFO L276 IsEmpty]: Start isEmpty. Operand 63417 states and 258379 transitions. [2022-12-14 09:09:42,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:42,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:42,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:42,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-12-14 09:09:42,513 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:42,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:42,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1068703488, now seen corresponding path program 5 times [2022-12-14 09:09:42,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:42,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947969004] [2022-12-14 09:09:42,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:42,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:42,950 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947969004] [2022-12-14 09:09:42,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947969004] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:42,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:09:42,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:09:42,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846680933] [2022-12-14 09:09:42,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:42,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:09:42,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:42,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:09:42,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:09:42,951 INFO L87 Difference]: Start difference. First operand 63417 states and 258379 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:43,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:43,860 INFO L93 Difference]: Finished difference Result 75522 states and 304016 transitions. [2022-12-14 09:09:43,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:09:43,860 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:43,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:44,117 INFO L225 Difference]: With dead ends: 75522 [2022-12-14 09:09:44,117 INFO L226 Difference]: Without dead ends: 75452 [2022-12-14 09:09:44,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:09:44,118 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 242 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:44,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 0 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:09:44,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75452 states. [2022-12-14 09:09:45,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75452 to 65732. [2022-12-14 09:09:45,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65732 states, 65707 states have (on average 4.057619431719604) internal successors, (266614), 65731 states have internal predecessors, (266614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:45,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65732 states to 65732 states and 266614 transitions. [2022-12-14 09:09:45,746 INFO L78 Accepts]: Start accepts. Automaton has 65732 states and 266614 transitions. Word has length 49 [2022-12-14 09:09:45,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:45,746 INFO L495 AbstractCegarLoop]: Abstraction has 65732 states and 266614 transitions. [2022-12-14 09:09:45,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand 65732 states and 266614 transitions. [2022-12-14 09:09:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:45,787 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:45,787 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:45,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-12-14 09:09:45,788 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:45,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:45,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1631409052, now seen corresponding path program 6 times [2022-12-14 09:09:45,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:45,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376292165] [2022-12-14 09:09:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:45,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:46,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376292165] [2022-12-14 09:09:46,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376292165] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:46,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802384357] [2022-12-14 09:09:46,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:09:46,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:46,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:46,575 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:46,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-12-14 09:09:47,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:09:47,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:09:47,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-14 09:09:47,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:47,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-12-14 09:09:47,222 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:47,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:47,241 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:09:47,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-12-14 09:09:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:47,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802384357] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:09:47,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1043386131] [2022-12-14 09:09:47,254 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:09:47,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:09:47,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 14 [2022-12-14 09:09:47,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789278018] [2022-12-14 09:09:47,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:09:47,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 09:09:47,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:47,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 09:09:47,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:09:47,255 INFO L87 Difference]: Start difference. First operand 65732 states and 266614 transitions. Second operand has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:48,813 INFO L93 Difference]: Finished difference Result 101346 states and 402599 transitions. [2022-12-14 09:09:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:09:48,814 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:49,180 INFO L225 Difference]: With dead ends: 101346 [2022-12-14 09:09:49,180 INFO L226 Difference]: Without dead ends: 101289 [2022-12-14 09:09:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2022-12-14 09:09:49,181 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 463 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1300 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:49,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 0 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1300 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-12-14 09:09:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101289 states. [2022-12-14 09:09:50,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101289 to 65764. [2022-12-14 09:09:50,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65764 states, 65739 states have (on average 4.058640989367042) internal successors, (266811), 65763 states have internal predecessors, (266811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:51,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65764 states to 65764 states and 266811 transitions. [2022-12-14 09:09:51,123 INFO L78 Accepts]: Start accepts. Automaton has 65764 states and 266811 transitions. Word has length 49 [2022-12-14 09:09:51,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:51,123 INFO L495 AbstractCegarLoop]: Abstraction has 65764 states and 266811 transitions. [2022-12-14 09:09:51,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.642857142857143) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 65764 states and 266811 transitions. [2022-12-14 09:09:51,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:51,164 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:51,164 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:51,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-12-14 09:09:51,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:51,365 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash -564964988, now seen corresponding path program 7 times [2022-12-14 09:09:51,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035568899] [2022-12-14 09:09:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:51,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035568899] [2022-12-14 09:09:51,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035568899] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:09:51,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973466367] [2022-12-14 09:09:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:09:51,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:09:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:09:51,845 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:09:51,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-12-14 09:09:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:52,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:09:52,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:09:52,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 09:09:52,187 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:52,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:09:52,210 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:09:52,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-12-14 09:09:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:52,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973466367] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:09:52,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [131553317] [2022-12-14 09:09:52,221 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:09:52,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:09:52,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 15 [2022-12-14 09:09:52,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695046888] [2022-12-14 09:09:52,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:09:52,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 09:09:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:52,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 09:09:52,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:09:52,222 INFO L87 Difference]: Start difference. First operand 65764 states and 266811 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:54,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:54,193 INFO L93 Difference]: Finished difference Result 107903 states and 418577 transitions. [2022-12-14 09:09:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-12-14 09:09:54,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 09:09:54,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:54,576 INFO L225 Difference]: With dead ends: 107903 [2022-12-14 09:09:54,577 INFO L226 Difference]: Without dead ends: 107511 [2022-12-14 09:09:54,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=314, Invalid=876, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 09:09:54,577 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 532 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:54,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 0 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:09:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107511 states. [2022-12-14 09:09:56,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107511 to 66168. [2022-12-14 09:09:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66168 states, 66143 states have (on average 4.061608938209637) internal successors, (268647), 66167 states have internal predecessors, (268647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66168 states to 66168 states and 268647 transitions. [2022-12-14 09:09:56,707 INFO L78 Accepts]: Start accepts. Automaton has 66168 states and 268647 transitions. Word has length 49 [2022-12-14 09:09:56,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:09:56,708 INFO L495 AbstractCegarLoop]: Abstraction has 66168 states and 268647 transitions. [2022-12-14 09:09:56,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 66168 states and 268647 transitions. [2022-12-14 09:09:56,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:09:56,760 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:09:56,760 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:09:56,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-12-14 09:09:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-12-14 09:09:56,962 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:09:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:09:56,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1434894332, now seen corresponding path program 8 times [2022-12-14 09:09:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:09:56,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393239188] [2022-12-14 09:09:56,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:09:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:09:57,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:09:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:09:57,408 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:09:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393239188] [2022-12-14 09:09:57,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393239188] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:09:57,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:09:57,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:09:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064191309] [2022-12-14 09:09:57,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:09:57,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:09:57,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:09:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:09:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:09:57,410 INFO L87 Difference]: Start difference. First operand 66168 states and 268647 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:09:58,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:09:58,329 INFO L93 Difference]: Finished difference Result 74334 states and 299091 transitions. [2022-12-14 09:09:58,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:09:58,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:09:58,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:09:58,589 INFO L225 Difference]: With dead ends: 74334 [2022-12-14 09:09:58,589 INFO L226 Difference]: Without dead ends: 74334 [2022-12-14 09:09:58,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:09:58,590 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 225 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:09:58,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 0 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:09:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74334 states. [2022-12-14 09:09:59,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74334 to 66273. [2022-12-14 09:09:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66273 states, 66248 states have (on average 4.0613754377490645) internal successors, (269058), 66272 states have internal predecessors, (269058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66273 states to 66273 states and 269058 transitions. [2022-12-14 09:10:00,191 INFO L78 Accepts]: Start accepts. Automaton has 66273 states and 269058 transitions. Word has length 49 [2022-12-14 09:10:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:00,192 INFO L495 AbstractCegarLoop]: Abstraction has 66273 states and 269058 transitions. [2022-12-14 09:10:00,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66273 states and 269058 transitions. [2022-12-14 09:10:00,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 09:10:00,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:00,234 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:00,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-12-14 09:10:00,234 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:00,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1852273924, now seen corresponding path program 9 times [2022-12-14 09:10:00,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:00,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743642967] [2022-12-14 09:10:00,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:00,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:00,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743642967] [2022-12-14 09:10:00,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743642967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:00,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:00,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:10:00,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646785824] [2022-12-14 09:10:00,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:00,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:10:00,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:10:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:00,518 INFO L87 Difference]: Start difference. First operand 66273 states and 269058 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:01,306 INFO L93 Difference]: Finished difference Result 75855 states and 298412 transitions. [2022-12-14 09:10:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:10:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 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 49 [2022-12-14 09:10:01,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:01,577 INFO L225 Difference]: With dead ends: 75855 [2022-12-14 09:10:01,577 INFO L226 Difference]: Without dead ends: 75839 [2022-12-14 09:10:01,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:01,578 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:01,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 0 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:10:01,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75839 states. [2022-12-14 09:10:02,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75839 to 66145. [2022-12-14 09:10:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66145 states, 66120 states have (on average 4.061645493042953) internal successors, (268556), 66144 states have internal predecessors, (268556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:03,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66145 states to 66145 states and 268556 transitions. [2022-12-14 09:10:03,390 INFO L78 Accepts]: Start accepts. Automaton has 66145 states and 268556 transitions. Word has length 49 [2022-12-14 09:10:03,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:03,391 INFO L495 AbstractCegarLoop]: Abstraction has 66145 states and 268556 transitions. [2022-12-14 09:10:03,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:03,391 INFO L276 IsEmpty]: Start isEmpty. Operand 66145 states and 268556 transitions. [2022-12-14 09:10:03,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:03,450 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:03,450 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:03,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-12-14 09:10:03,450 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:03,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:03,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2114331679, now seen corresponding path program 1 times [2022-12-14 09:10:03,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:03,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977133886] [2022-12-14 09:10:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:03,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:04,284 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977133886] [2022-12-14 09:10:04,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977133886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:04,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019516571] [2022-12-14 09:10:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:04,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:04,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:04,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-12-14 09:10:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:10:04,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:04,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:04,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 09:10:04,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-12-14 09:10:05,020 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:05,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:05,338 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:05,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 232 [2022-12-14 09:10:05,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:05,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 224 [2022-12-14 09:10:05,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-12-14 09:10:05,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2022-12-14 09:10:05,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-12-14 09:10:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:06,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019516571] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:06,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699177669] [2022-12-14 09:10:06,232 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:10:06,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:06,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 26 [2022-12-14 09:10:06,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27631470] [2022-12-14 09:10:06,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:06,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 09:10:06,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 09:10:06,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=648, Unknown=1, NotChecked=0, Total=756 [2022-12-14 09:10:06,234 INFO L87 Difference]: Start difference. First operand 66145 states and 268556 transitions. Second operand has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:10,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:10,985 INFO L93 Difference]: Finished difference Result 120742 states and 463192 transitions. [2022-12-14 09:10:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-14 09:10:10,986 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 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 50 [2022-12-14 09:10:10,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:11,523 INFO L225 Difference]: With dead ends: 120742 [2022-12-14 09:10:11,523 INFO L226 Difference]: Without dead ends: 120619 [2022-12-14 09:10:11,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=612, Invalid=2143, Unknown=1, NotChecked=0, Total=2756 [2022-12-14 09:10:11,524 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1677 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1677 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:11,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1677 Valid, 0 Invalid, 2749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-12-14 09:10:11,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120619 states. [2022-12-14 09:10:13,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120619 to 59251. [2022-12-14 09:10:13,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59251 states, 59226 states have (on average 4.046263465369939) internal successors, (239644), 59250 states have internal predecessors, (239644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59251 states to 59251 states and 239644 transitions. [2022-12-14 09:10:13,459 INFO L78 Accepts]: Start accepts. Automaton has 59251 states and 239644 transitions. Word has length 50 [2022-12-14 09:10:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:13,459 INFO L495 AbstractCegarLoop]: Abstraction has 59251 states and 239644 transitions. [2022-12-14 09:10:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.925925925925926) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 59251 states and 239644 transitions. [2022-12-14 09:10:13,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:13,495 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:13,496 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:13,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-12-14 09:10:13,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-12-14 09:10:13,697 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:13,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2099532729, now seen corresponding path program 1 times [2022-12-14 09:10:13,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:13,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582412342] [2022-12-14 09:10:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:13,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-12-14 09:10:14,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:14,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582412342] [2022-12-14 09:10:14,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582412342] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:14,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:14,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-14 09:10:14,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794691125] [2022-12-14 09:10:14,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:14,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:10:14,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:14,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:10:14,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-12-14 09:10:14,188 INFO L87 Difference]: Start difference. First operand 59251 states and 239644 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:15,057 INFO L93 Difference]: Finished difference Result 76107 states and 300558 transitions. [2022-12-14 09:10:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:10:15,058 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 09:10:15,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:15,315 INFO L225 Difference]: With dead ends: 76107 [2022-12-14 09:10:15,315 INFO L226 Difference]: Without dead ends: 75937 [2022-12-14 09:10:15,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:10:15,316 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 111 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:15,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 0 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75937 states. [2022-12-14 09:10:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75937 to 58833. [2022-12-14 09:10:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58833 states, 58808 states have (on average 4.039569446333832) internal successors, (237559), 58832 states have internal predecessors, (237559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:16,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58833 states to 58833 states and 237559 transitions. [2022-12-14 09:10:16,773 INFO L78 Accepts]: Start accepts. Automaton has 58833 states and 237559 transitions. Word has length 50 [2022-12-14 09:10:16,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:16,773 INFO L495 AbstractCegarLoop]: Abstraction has 58833 states and 237559 transitions. [2022-12-14 09:10:16,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 6 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:16,773 INFO L276 IsEmpty]: Start isEmpty. Operand 58833 states and 237559 transitions. [2022-12-14 09:10:16,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:16,811 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:16,811 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:16,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-12-14 09:10:16,811 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:16,812 INFO L85 PathProgramCache]: Analyzing trace with hash 539908763, now seen corresponding path program 2 times [2022-12-14 09:10:16,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:16,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844153227] [2022-12-14 09:10:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:16,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:17,804 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:10:17,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844153227] [2022-12-14 09:10:17,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844153227] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:17,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148785074] [2022-12-14 09:10:17,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:10:17,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:17,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:17,805 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:17,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-12-14 09:10:18,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:10:18,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:18,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:10:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:18,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:18,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 09:10:18,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-12-14 09:10:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:18,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:18,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 120 [2022-12-14 09:10:18,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 118 [2022-12-14 09:10:18,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-12-14 09:10:18,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 73 [2022-12-14 09:10:18,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2022-12-14 09:10:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:19,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148785074] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:19,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1539028435] [2022-12-14 09:10:19,006 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:10:19,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:19,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2022-12-14 09:10:19,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827892141] [2022-12-14 09:10:19,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:19,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:10:19,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:19,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:10:19,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=501, Unknown=1, NotChecked=0, Total=600 [2022-12-14 09:10:19,008 INFO L87 Difference]: Start difference. First operand 58833 states and 237559 transitions. Second operand has 25 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:21,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:21,057 INFO L93 Difference]: Finished difference Result 93036 states and 366602 transitions. [2022-12-14 09:10:21,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 09:10:21,058 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 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 50 [2022-12-14 09:10:21,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:21,380 INFO L225 Difference]: With dead ends: 93036 [2022-12-14 09:10:21,380 INFO L226 Difference]: Without dead ends: 92910 [2022-12-14 09:10:21,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=328, Invalid=1077, Unknown=1, NotChecked=0, Total=1406 [2022-12-14 09:10:21,380 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1117 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1117 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:21,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1117 Valid, 0 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:10:21,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92910 states. [2022-12-14 09:10:22,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92910 to 58705. [2022-12-14 09:10:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58705 states, 58680 states have (on average 4.036758691206544) internal successors, (236877), 58704 states have internal predecessors, (236877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58705 states to 58705 states and 236877 transitions. [2022-12-14 09:10:23,163 INFO L78 Accepts]: Start accepts. Automaton has 58705 states and 236877 transitions. Word has length 50 [2022-12-14 09:10:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:23,163 INFO L495 AbstractCegarLoop]: Abstraction has 58705 states and 236877 transitions. [2022-12-14 09:10:23,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.083333333333333) internal successors, (98), 24 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 58705 states and 236877 transitions. [2022-12-14 09:10:23,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:23,199 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:23,199 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:23,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-12-14 09:10:23,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:23,401 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1057747927, now seen corresponding path program 3 times [2022-12-14 09:10:23,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:23,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644584179] [2022-12-14 09:10:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:23,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:10:24,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:24,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644584179] [2022-12-14 09:10:24,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644584179] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:24,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620937380] [2022-12-14 09:10:24,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:10:24,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:24,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:24,817 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:24,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-12-14 09:10:25,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:10:25,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:25,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 33 conjunts are in the unsatisfiable core [2022-12-14 09:10:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:25,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 09:10:25,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:25,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2022-12-14 09:10:25,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2022-12-14 09:10:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:10:25,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:26,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:26,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 232 [2022-12-14 09:10:26,306 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:26,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 224 treesize of output 224 [2022-12-14 09:10:27,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 173 [2022-12-14 09:10:27,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 147 [2022-12-14 09:10:27,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 143 [2022-12-14 09:10:27,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 135 [2022-12-14 09:10:27,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 131 [2022-12-14 09:10:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:10:27,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620937380] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:27,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [887897868] [2022-12-14 09:10:27,723 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:10:27,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:27,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-12-14 09:10:27,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657246845] [2022-12-14 09:10:27,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:27,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 09:10:27,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:27,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 09:10:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1161, Unknown=3, NotChecked=0, Total=1332 [2022-12-14 09:10:27,725 INFO L87 Difference]: Start difference. First operand 58705 states and 236877 transitions. Second operand has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:35,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:35,970 INFO L93 Difference]: Finished difference Result 91801 states and 359076 transitions. [2022-12-14 09:10:35,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-12-14 09:10:35,971 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 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 50 [2022-12-14 09:10:35,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:36,281 INFO L225 Difference]: With dead ends: 91801 [2022-12-14 09:10:36,281 INFO L226 Difference]: Without dead ends: 91638 [2022-12-14 09:10:36,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1095, Invalid=4158, Unknown=3, NotChecked=0, Total=5256 [2022-12-14 09:10:36,282 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1658 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1658 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:36,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1658 Valid, 0 Invalid, 4602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 09:10:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91638 states. [2022-12-14 09:10:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91638 to 56237. [2022-12-14 09:10:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56237 states, 56212 states have (on average 4.006955810147299) internal successors, (225239), 56236 states have internal predecessors, (225239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56237 states to 56237 states and 225239 transitions. [2022-12-14 09:10:38,036 INFO L78 Accepts]: Start accepts. Automaton has 56237 states and 225239 transitions. Word has length 50 [2022-12-14 09:10:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:38,036 INFO L495 AbstractCegarLoop]: Abstraction has 56237 states and 225239 transitions. [2022-12-14 09:10:38,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.111111111111111) internal successors, (112), 36 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:38,036 INFO L276 IsEmpty]: Start isEmpty. Operand 56237 states and 225239 transitions. [2022-12-14 09:10:38,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:38,070 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:38,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:38,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-12-14 09:10:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:38,272 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -952580837, now seen corresponding path program 2 times [2022-12-14 09:10:38,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974210360] [2022-12-14 09:10:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:38,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:38,697 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:38,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974210360] [2022-12-14 09:10:38,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974210360] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:38,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:38,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:10:38,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228931277] [2022-12-14 09:10:38,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:38,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:10:38,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:38,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:10:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:10:38,698 INFO L87 Difference]: Start difference. First operand 56237 states and 225239 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:39,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:39,389 INFO L93 Difference]: Finished difference Result 76484 states and 302357 transitions. [2022-12-14 09:10:39,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:10:39,390 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 09:10:39,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:39,650 INFO L225 Difference]: With dead ends: 76484 [2022-12-14 09:10:39,650 INFO L226 Difference]: Without dead ends: 76294 [2022-12-14 09:10:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:10:39,650 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:10:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76294 states. [2022-12-14 09:10:40,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76294 to 54890. [2022-12-14 09:10:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54868 states have (on average 4.002187067142962) internal successors, (219592), 54889 states have internal predecessors, (219592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:41,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 219592 transitions. [2022-12-14 09:10:41,098 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 219592 transitions. Word has length 50 [2022-12-14 09:10:41,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:41,098 INFO L495 AbstractCegarLoop]: Abstraction has 54890 states and 219592 transitions. [2022-12-14 09:10:41,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:41,098 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 219592 transitions. [2022-12-14 09:10:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-14 09:10:41,133 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:41,133 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:41,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-12-14 09:10:41,133 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:41,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash 329254147, now seen corresponding path program 1 times [2022-12-14 09:10:41,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:41,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060519613] [2022-12-14 09:10:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:41,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:41,456 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:41,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:41,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060519613] [2022-12-14 09:10:41,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060519613] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:10:41,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:10:41,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 09:10:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297090543] [2022-12-14 09:10:41,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:10:41,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 09:10:41,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 09:10:41,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:41,457 INFO L87 Difference]: Start difference. First operand 54890 states and 219592 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:42,081 INFO L93 Difference]: Finished difference Result 55456 states and 220784 transitions. [2022-12-14 09:10:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 09:10:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-14 09:10:42,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:42,266 INFO L225 Difference]: With dead ends: 55456 [2022-12-14 09:10:42,266 INFO L226 Difference]: Without dead ends: 55444 [2022-12-14 09:10:42,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-14 09:10:42,266 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:42,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 09:10:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55444 states. [2022-12-14 09:10:43,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55444 to 54890. [2022-12-14 09:10:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54890 states, 54868 states have (on average 4.002187067142962) internal successors, (219592), 54889 states have internal predecessors, (219592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:43,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54890 states to 54890 states and 219592 transitions. [2022-12-14 09:10:43,507 INFO L78 Accepts]: Start accepts. Automaton has 54890 states and 219592 transitions. Word has length 50 [2022-12-14 09:10:43,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:43,508 INFO L495 AbstractCegarLoop]: Abstraction has 54890 states and 219592 transitions. [2022-12-14 09:10:43,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:43,508 INFO L276 IsEmpty]: Start isEmpty. Operand 54890 states and 219592 transitions. [2022-12-14 09:10:43,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:10:43,542 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:43,542 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:43,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-12-14 09:10:43,542 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:43,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1125275460, now seen corresponding path program 1 times [2022-12-14 09:10:43,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:43,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852135480] [2022-12-14 09:10:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:43,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:44,670 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852135480] [2022-12-14 09:10:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852135480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:44,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128195262] [2022-12-14 09:10:44,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:44,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:44,671 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:44,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-12-14 09:10:45,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:45,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 09:10:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:45,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:10:45,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-12-14 09:10:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:45,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:45,328 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:10:45,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 38 [2022-12-14 09:10:45,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-12-14 09:10:45,394 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:45,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128195262] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:45,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2001393155] [2022-12-14 09:10:45,395 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:10:45,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:45,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2022-12-14 09:10:45,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163851802] [2022-12-14 09:10:45,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:45,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:10:45,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:10:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=498, Unknown=4, NotChecked=0, Total=600 [2022-12-14 09:10:45,396 INFO L87 Difference]: Start difference. First operand 54890 states and 219592 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:49,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:49,271 INFO L93 Difference]: Finished difference Result 113413 states and 429914 transitions. [2022-12-14 09:10:49,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-12-14 09:10:49,272 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 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 51 [2022-12-14 09:10:49,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:10:49,747 INFO L225 Difference]: With dead ends: 113413 [2022-12-14 09:10:49,747 INFO L226 Difference]: Without dead ends: 109070 [2022-12-14 09:10:49,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=821, Invalid=2597, Unknown=4, NotChecked=0, Total=3422 [2022-12-14 09:10:49,748 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 682 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:10:49,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 0 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-14 09:10:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109070 states. [2022-12-14 09:10:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109070 to 38831. [2022-12-14 09:10:51,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38831 states, 38805 states have (on average 3.871124855044453) internal successors, (150219), 38830 states have internal predecessors, (150219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38831 states to 38831 states and 150219 transitions. [2022-12-14 09:10:51,172 INFO L78 Accepts]: Start accepts. Automaton has 38831 states and 150219 transitions. Word has length 51 [2022-12-14 09:10:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:10:51,172 INFO L495 AbstractCegarLoop]: Abstraction has 38831 states and 150219 transitions. [2022-12-14 09:10:51,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 24 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38831 states and 150219 transitions. [2022-12-14 09:10:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:10:51,196 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:10:51,196 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:10:51,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-12-14 09:10:51,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:51,397 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:10:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:10:51,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1147441082, now seen corresponding path program 2 times [2022-12-14 09:10:51,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:10:51,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031345057] [2022-12-14 09:10:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:10:51,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:10:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:10:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:52,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:10:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031345057] [2022-12-14 09:10:52,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031345057] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:10:52,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813905472] [2022-12-14 09:10:52,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:10:52,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:10:52,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:10:52,665 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:10:52,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-12-14 09:10:53,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:10:53,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:10:53,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 09:10:53,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:10:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:53,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:10:53,634 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:10:53,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2022-12-14 09:10:53,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 09:10:53,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2022-12-14 09:10:53,758 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:10:53,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813905472] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:10:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1050706289] [2022-12-14 09:10:53,758 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:10:53,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:10:53,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 25 [2022-12-14 09:10:53,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676097366] [2022-12-14 09:10:53,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:10:53,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:10:53,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:10:53,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:10:53,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:10:53,759 INFO L87 Difference]: Start difference. First operand 38831 states and 150219 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:10:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:10:59,872 INFO L93 Difference]: Finished difference Result 84747 states and 316573 transitions. [2022-12-14 09:10:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 09:10:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2022-12-14 09:10:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:00,142 INFO L225 Difference]: With dead ends: 84747 [2022-12-14 09:11:00,142 INFO L226 Difference]: Without dead ends: 84504 [2022-12-14 09:11:00,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2121, Invalid=7191, Unknown=0, NotChecked=0, Total=9312 [2022-12-14 09:11:00,143 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1238 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3176 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1238 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 3176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:00,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1238 Valid, 0 Invalid, 3262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 3176 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-12-14 09:11:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84504 states. [2022-12-14 09:11:01,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84504 to 39193. [2022-12-14 09:11:01,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39193 states, 39167 states have (on average 3.8773201930196337) internal successors, (151863), 39192 states have internal predecessors, (151863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:01,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39193 states to 39193 states and 151863 transitions. [2022-12-14 09:11:01,370 INFO L78 Accepts]: Start accepts. Automaton has 39193 states and 151863 transitions. Word has length 51 [2022-12-14 09:11:01,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:01,370 INFO L495 AbstractCegarLoop]: Abstraction has 39193 states and 151863 transitions. [2022-12-14 09:11:01,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:01,370 INFO L276 IsEmpty]: Start isEmpty. Operand 39193 states and 151863 transitions. [2022-12-14 09:11:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:01,393 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:01,393 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:01,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-12-14 09:11:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:01,595 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash 234965786, now seen corresponding path program 3 times [2022-12-14 09:11:01,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:01,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004423175] [2022-12-14 09:11:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:01,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:02,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004423175] [2022-12-14 09:11:02,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004423175] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:02,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122888539] [2022-12-14 09:11:02,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:11:02,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:02,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:02,688 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:02,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-12-14 09:11:03,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:11:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:11:03,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 40 conjunts are in the unsatisfiable core [2022-12-14 09:11:03,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:03,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:04,196 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:11:04,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2022-12-14 09:11:04,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 09:11:04,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2022-12-14 09:11:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:04,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122888539] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:04,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1932507847] [2022-12-14 09:11:04,329 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:11:04,329 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:04,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 30 [2022-12-14 09:11:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111746344] [2022-12-14 09:11:04,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-14 09:11:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-14 09:11:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2022-12-14 09:11:04,330 INFO L87 Difference]: Start difference. First operand 39193 states and 151863 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:15,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:15,387 INFO L93 Difference]: Finished difference Result 100676 states and 370922 transitions. [2022-12-14 09:11:15,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-12-14 09:11:15,388 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:15,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:15,725 INFO L225 Difference]: With dead ends: 100676 [2022-12-14 09:11:15,725 INFO L226 Difference]: Without dead ends: 100595 [2022-12-14 09:11:15,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10711 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5326, Invalid=22064, Unknown=0, NotChecked=0, Total=27390 [2022-12-14 09:11:15,727 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1752 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1752 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:15,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1752 Valid, 0 Invalid, 4875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 4674 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-12-14 09:11:15,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100595 states. [2022-12-14 09:11:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100595 to 39202. [2022-12-14 09:11:16,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39202 states, 39176 states have (on average 3.877220747396365) internal successors, (151894), 39201 states have internal predecessors, (151894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39202 states to 39202 states and 151894 transitions. [2022-12-14 09:11:17,089 INFO L78 Accepts]: Start accepts. Automaton has 39202 states and 151894 transitions. Word has length 51 [2022-12-14 09:11:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:17,089 INFO L495 AbstractCegarLoop]: Abstraction has 39202 states and 151894 transitions. [2022-12-14 09:11:17,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:17,090 INFO L276 IsEmpty]: Start isEmpty. Operand 39202 states and 151894 transitions. [2022-12-14 09:11:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:17,115 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:17,115 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:17,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-12-14 09:11:17,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-12-14 09:11:17,317 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1394704144, now seen corresponding path program 4 times [2022-12-14 09:11:17,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:17,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513020197] [2022-12-14 09:11:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:17,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:11:18,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:18,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513020197] [2022-12-14 09:11:18,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513020197] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:18,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287258213] [2022-12-14 09:11:18,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:11:18,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:18,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:18,308 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:18,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-12-14 09:11:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-14 09:11:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:11:19,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:19,337 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:11:19,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2022-12-14 09:11:19,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 09:11:19,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2022-12-14 09:11:19,460 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:11:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287258213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196868132] [2022-12-14 09:11:19,461 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:11:19,461 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:19,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 23 [2022-12-14 09:11:19,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843984538] [2022-12-14 09:11:19,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:19,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:11:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:11:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2022-12-14 09:11:19,462 INFO L87 Difference]: Start difference. First operand 39202 states and 151894 transitions. Second operand has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:24,890 INFO L93 Difference]: Finished difference Result 67897 states and 254273 transitions. [2022-12-14 09:11:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-12-14 09:11:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 09:11:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:25,104 INFO L225 Difference]: With dead ends: 67897 [2022-12-14 09:11:25,104 INFO L226 Difference]: Without dead ends: 67827 [2022-12-14 09:11:25,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2043, Invalid=6887, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 09:11:25,105 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1121 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1121 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1121 Valid, 0 Invalid, 2646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-12-14 09:11:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67827 states. [2022-12-14 09:11:25,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67827 to 39202. [2022-12-14 09:11:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39202 states, 39176 states have (on average 3.877220747396365) internal successors, (151894), 39201 states have internal predecessors, (151894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39202 states to 39202 states and 151894 transitions. [2022-12-14 09:11:26,135 INFO L78 Accepts]: Start accepts. Automaton has 39202 states and 151894 transitions. Word has length 51 [2022-12-14 09:11:26,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:26,135 INFO L495 AbstractCegarLoop]: Abstraction has 39202 states and 151894 transitions. [2022-12-14 09:11:26,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.739130434782609) internal successors, (86), 23 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:26,135 INFO L276 IsEmpty]: Start isEmpty. Operand 39202 states and 151894 transitions. [2022-12-14 09:11:26,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:26,160 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:26,160 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:26,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-12-14 09:11:26,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-12-14 09:11:26,361 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:26,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:26,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1128356410, now seen corresponding path program 5 times [2022-12-14 09:11:26,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:26,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262280670] [2022-12-14 09:11:26,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:26,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:27,387 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:27,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:27,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262280670] [2022-12-14 09:11:27,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262280670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:27,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582818844] [2022-12-14 09:11:27,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:11:27,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:27,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:27,388 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:27,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-12-14 09:11:27,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:11:27,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:11:27,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-14 09:11:27,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:27,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:11:27,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:11:27,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-12-14 09:11:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:27,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:28,006 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:11:28,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-14 09:11:28,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-14 09:11:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:28,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582818844] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:28,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [381415732] [2022-12-14 09:11:28,090 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:11:28,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:28,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-12-14 09:11:28,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107313156] [2022-12-14 09:11:28,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:28,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-14 09:11:28,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-14 09:11:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=402, Unknown=8, NotChecked=0, Total=506 [2022-12-14 09:11:28,091 INFO L87 Difference]: Start difference. First operand 39202 states and 151894 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:29,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:29,920 INFO L93 Difference]: Finished difference Result 54792 states and 207179 transitions. [2022-12-14 09:11:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-14 09:11:29,921 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:30,091 INFO L225 Difference]: With dead ends: 54792 [2022-12-14 09:11:30,091 INFO L226 Difference]: Without dead ends: 54522 [2022-12-14 09:11:30,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=1235, Unknown=8, NotChecked=0, Total=1640 [2022-12-14 09:11:30,092 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 686 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:30,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 0 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:11:30,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54522 states. [2022-12-14 09:11:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54522 to 39113. [2022-12-14 09:11:30,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39113 states, 39087 states have (on average 3.879218154373577) internal successors, (151627), 39112 states have internal predecessors, (151627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39113 states to 39113 states and 151627 transitions. [2022-12-14 09:11:31,004 INFO L78 Accepts]: Start accepts. Automaton has 39113 states and 151627 transitions. Word has length 51 [2022-12-14 09:11:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:31,004 INFO L495 AbstractCegarLoop]: Abstraction has 39113 states and 151627 transitions. [2022-12-14 09:11:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 22 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 39113 states and 151627 transitions. [2022-12-14 09:11:31,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:31,030 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:31,030 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:31,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-12-14 09:11:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-12-14 09:11:31,232 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:31,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1236469798, now seen corresponding path program 6 times [2022-12-14 09:11:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265369982] [2022-12-14 09:11:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:31,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:31,999 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:31,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:31,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265369982] [2022-12-14 09:11:31,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265369982] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:31,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:31,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:11:31,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212448085] [2022-12-14 09:11:31,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:31,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:11:31,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:32,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:11:32,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:11:32,000 INFO L87 Difference]: Start difference. First operand 39113 states and 151627 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:32,926 INFO L93 Difference]: Finished difference Result 41311 states and 158434 transitions. [2022-12-14 09:11:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:11:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:33,052 INFO L225 Difference]: With dead ends: 41311 [2022-12-14 09:11:33,052 INFO L226 Difference]: Without dead ends: 41281 [2022-12-14 09:11:33,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:11:33,053 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 149 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:33,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 0 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 09:11:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41281 states. [2022-12-14 09:11:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41281 to 39108. [2022-12-14 09:11:33,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39108 states, 39082 states have (on average 3.8785886085666035) internal successors, (151583), 39107 states have internal predecessors, (151583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:33,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39108 states to 39108 states and 151583 transitions. [2022-12-14 09:11:33,841 INFO L78 Accepts]: Start accepts. Automaton has 39108 states and 151583 transitions. Word has length 51 [2022-12-14 09:11:33,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:33,841 INFO L495 AbstractCegarLoop]: Abstraction has 39108 states and 151583 transitions. [2022-12-14 09:11:33,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:33,841 INFO L276 IsEmpty]: Start isEmpty. Operand 39108 states and 151583 transitions. [2022-12-14 09:11:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:33,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:33,866 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:33,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-12-14 09:11:33,866 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:33,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:33,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1091683966, now seen corresponding path program 7 times [2022-12-14 09:11:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:33,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136817336] [2022-12-14 09:11:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:34,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:34,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136817336] [2022-12-14 09:11:34,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136817336] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:34,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:34,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:11:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029176814] [2022-12-14 09:11:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:34,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:11:34,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:34,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:11:34,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:11:34,597 INFO L87 Difference]: Start difference. First operand 39108 states and 151583 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:35,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:35,455 INFO L93 Difference]: Finished difference Result 45505 states and 173930 transitions. [2022-12-14 09:11:35,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:11:35,456 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:35,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:35,591 INFO L225 Difference]: With dead ends: 45505 [2022-12-14 09:11:35,591 INFO L226 Difference]: Without dead ends: 45477 [2022-12-14 09:11:35,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-12-14 09:11:35,592 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 206 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:35,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 0 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-12-14 09:11:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45477 states. [2022-12-14 09:11:36,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45477 to 39029. [2022-12-14 09:11:36,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39029 states, 39003 states have (on average 3.8790605850831987) internal successors, (151295), 39028 states have internal predecessors, (151295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39029 states to 39029 states and 151295 transitions. [2022-12-14 09:11:36,450 INFO L78 Accepts]: Start accepts. Automaton has 39029 states and 151295 transitions. Word has length 51 [2022-12-14 09:11:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:36,450 INFO L495 AbstractCegarLoop]: Abstraction has 39029 states and 151295 transitions. [2022-12-14 09:11:36,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 39029 states and 151295 transitions. [2022-12-14 09:11:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:36,475 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:36,475 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:36,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-12-14 09:11:36,475 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2005728910, now seen corresponding path program 8 times [2022-12-14 09:11:36,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840517114] [2022-12-14 09:11:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:36,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:36,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:37,226 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:37,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:37,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840517114] [2022-12-14 09:11:37,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840517114] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:37,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:37,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:11:37,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828899229] [2022-12-14 09:11:37,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:37,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:11:37,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:11:37,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:11:37,227 INFO L87 Difference]: Start difference. First operand 39029 states and 151295 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:37,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:37,896 INFO L93 Difference]: Finished difference Result 41358 states and 158942 transitions. [2022-12-14 09:11:37,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:11:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:37,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:38,019 INFO L225 Difference]: With dead ends: 41358 [2022-12-14 09:11:38,019 INFO L226 Difference]: Without dead ends: 41340 [2022-12-14 09:11:38,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 09:11:38,020 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:38,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:11:38,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41340 states. [2022-12-14 09:11:38,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41340 to 38942. [2022-12-14 09:11:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38942 states, 38916 states have (on average 3.878430465618255) internal successors, (150933), 38941 states have internal predecessors, (150933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38942 states to 38942 states and 150933 transitions. [2022-12-14 09:11:38,816 INFO L78 Accepts]: Start accepts. Automaton has 38942 states and 150933 transitions. Word has length 51 [2022-12-14 09:11:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 38942 states and 150933 transitions. [2022-12-14 09:11:38,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:38,816 INFO L276 IsEmpty]: Start isEmpty. Operand 38942 states and 150933 transitions. [2022-12-14 09:11:38,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:38,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:38,841 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:38,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-12-14 09:11:38,841 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:38,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:38,841 INFO L85 PathProgramCache]: Analyzing trace with hash 322424854, now seen corresponding path program 9 times [2022-12-14 09:11:38,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:38,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319708956] [2022-12-14 09:11:38,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:38,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:39,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:39,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319708956] [2022-12-14 09:11:39,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319708956] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:39,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:39,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:11:39,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806903702] [2022-12-14 09:11:39,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:39,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:11:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:39,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:11:39,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:11:39,588 INFO L87 Difference]: Start difference. First operand 38942 states and 150933 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:40,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:40,338 INFO L93 Difference]: Finished difference Result 45616 states and 174643 transitions. [2022-12-14 09:11:40,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:11:40,339 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:40,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:40,475 INFO L225 Difference]: With dead ends: 45616 [2022-12-14 09:11:40,475 INFO L226 Difference]: Without dead ends: 45588 [2022-12-14 09:11:40,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-12-14 09:11:40,476 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:40,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:11:40,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45588 states. [2022-12-14 09:11:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45588 to 38844. [2022-12-14 09:11:41,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38844 states, 38818 states have (on average 3.8784069246225976) internal successors, (150552), 38843 states have internal predecessors, (150552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:41,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38844 states to 38844 states and 150552 transitions. [2022-12-14 09:11:41,306 INFO L78 Accepts]: Start accepts. Automaton has 38844 states and 150552 transitions. Word has length 51 [2022-12-14 09:11:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:41,307 INFO L495 AbstractCegarLoop]: Abstraction has 38844 states and 150552 transitions. [2022-12-14 09:11:41,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:41,307 INFO L276 IsEmpty]: Start isEmpty. Operand 38844 states and 150552 transitions. [2022-12-14 09:11:41,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:41,332 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:41,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:41,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-12-14 09:11:41,332 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:41,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1549429110, now seen corresponding path program 10 times [2022-12-14 09:11:41,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:41,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146231690] [2022-12-14 09:11:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:41,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146231690] [2022-12-14 09:11:41,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146231690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:41,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909533851] [2022-12-14 09:11:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:11:41,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:41,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:41,930 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:41,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-12-14 09:11:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:42,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:11:42,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:42,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-12-14 09:11:42,403 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:42,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:42,433 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:11:42,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 17 [2022-12-14 09:11:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:42,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909533851] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:42,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656351436] [2022-12-14 09:11:42,451 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:11:42,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:42,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 13 [2022-12-14 09:11:42,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993479353] [2022-12-14 09:11:42,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:42,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:11:42,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:42,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:11:42,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:11:42,452 INFO L87 Difference]: Start difference. First operand 38844 states and 150552 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:44,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:44,221 INFO L93 Difference]: Finished difference Result 67865 states and 255479 transitions. [2022-12-14 09:11:44,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-12-14 09:11:44,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 09:11:44,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:44,432 INFO L225 Difference]: With dead ends: 67865 [2022-12-14 09:11:44,432 INFO L226 Difference]: Without dead ends: 67622 [2022-12-14 09:11:44,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2022-12-14 09:11:44,433 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 348 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1718 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:44,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 0 Invalid, 1726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1718 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:11:44,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67622 states. [2022-12-14 09:11:45,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67622 to 38844. [2022-12-14 09:11:45,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38844 states, 38818 states have (on average 3.8784069246225976) internal successors, (150552), 38843 states have internal predecessors, (150552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:45,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38844 states to 38844 states and 150552 transitions. [2022-12-14 09:11:45,405 INFO L78 Accepts]: Start accepts. Automaton has 38844 states and 150552 transitions. Word has length 51 [2022-12-14 09:11:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:45,405 INFO L495 AbstractCegarLoop]: Abstraction has 38844 states and 150552 transitions. [2022-12-14 09:11:45,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:45,406 INFO L276 IsEmpty]: Start isEmpty. Operand 38844 states and 150552 transitions. [2022-12-14 09:11:45,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:45,431 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:45,431 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:45,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-12-14 09:11:45,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:45,633 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:45,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:45,633 INFO L85 PathProgramCache]: Analyzing trace with hash 450430210, now seen corresponding path program 11 times [2022-12-14 09:11:45,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:45,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885124740] [2022-12-14 09:11:45,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:45,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:46,163 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:46,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885124740] [2022-12-14 09:11:46,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885124740] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:46,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:46,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-14 09:11:46,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826697807] [2022-12-14 09:11:46,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:46,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 09:11:46,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:46,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 09:11:46,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-14 09:11:46,163 INFO L87 Difference]: Start difference. First operand 38844 states and 150552 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:46,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:46,736 INFO L93 Difference]: Finished difference Result 45244 states and 173638 transitions. [2022-12-14 09:11:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 09:11:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:46,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:46,871 INFO L225 Difference]: With dead ends: 45244 [2022-12-14 09:11:46,871 INFO L226 Difference]: Without dead ends: 45244 [2022-12-14 09:11:46,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-12-14 09:11:46,871 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 187 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:46,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 0 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:11:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45244 states. [2022-12-14 09:11:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45244 to 38898. [2022-12-14 09:11:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38898 states, 38872 states have (on average 3.87687795842766) internal successors, (150702), 38897 states have internal predecessors, (150702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38898 states to 38898 states and 150702 transitions. [2022-12-14 09:11:47,774 INFO L78 Accepts]: Start accepts. Automaton has 38898 states and 150702 transitions. Word has length 51 [2022-12-14 09:11:47,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:47,774 INFO L495 AbstractCegarLoop]: Abstraction has 38898 states and 150702 transitions. [2022-12-14 09:11:47,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:47,774 INFO L276 IsEmpty]: Start isEmpty. Operand 38898 states and 150702 transitions. [2022-12-14 09:11:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:47,801 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:47,801 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-12-14 09:11:47,801 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:47,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1080098338, now seen corresponding path program 12 times [2022-12-14 09:11:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:47,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960711566] [2022-12-14 09:11:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:48,498 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:48,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960711566] [2022-12-14 09:11:48,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960711566] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:48,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:48,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:11:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884819317] [2022-12-14 09:11:48,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:48,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:11:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:48,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:11:48,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:11:48,499 INFO L87 Difference]: Start difference. First operand 38898 states and 150702 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:49,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:49,178 INFO L93 Difference]: Finished difference Result 45478 states and 174463 transitions. [2022-12-14 09:11:49,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 09:11:49,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:49,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:49,311 INFO L225 Difference]: With dead ends: 45478 [2022-12-14 09:11:49,311 INFO L226 Difference]: Without dead ends: 45460 [2022-12-14 09:11:49,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:11:49,311 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 164 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:49,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 0 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 09:11:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45460 states. [2022-12-14 09:11:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45460 to 38827. [2022-12-14 09:11:50,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38827 states, 38801 states have (on average 3.877425839540218) internal successors, (150448), 38826 states have internal predecessors, (150448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:50,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38827 states to 38827 states and 150448 transitions. [2022-12-14 09:11:50,118 INFO L78 Accepts]: Start accepts. Automaton has 38827 states and 150448 transitions. Word has length 51 [2022-12-14 09:11:50,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:50,118 INFO L495 AbstractCegarLoop]: Abstraction has 38827 states and 150448 transitions. [2022-12-14 09:11:50,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:50,118 INFO L276 IsEmpty]: Start isEmpty. Operand 38827 states and 150448 transitions. [2022-12-14 09:11:50,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:50,143 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:50,143 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:50,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-12-14 09:11:50,143 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:50,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:50,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1458229250, now seen corresponding path program 13 times [2022-12-14 09:11:50,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:50,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158696878] [2022-12-14 09:11:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:50,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:50,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:50,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158696878] [2022-12-14 09:11:50,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158696878] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:50,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:50,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-14 09:11:50,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999880163] [2022-12-14 09:11:50,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:50,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 09:11:50,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:50,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 09:11:50,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-12-14 09:11:50,758 INFO L87 Difference]: Start difference. First operand 38827 states and 150448 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:51,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:51,595 INFO L93 Difference]: Finished difference Result 53266 states and 203419 transitions. [2022-12-14 09:11:51,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:11:51,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:51,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:51,763 INFO L225 Difference]: With dead ends: 53266 [2022-12-14 09:11:51,763 INFO L226 Difference]: Without dead ends: 53240 [2022-12-14 09:11:51,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-12-14 09:11:51,764 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:51,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:11:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53240 states. [2022-12-14 09:11:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53240 to 38809. [2022-12-14 09:11:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38809 states, 38783 states have (on average 3.8773947348064874) internal successors, (150377), 38808 states have internal predecessors, (150377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:52,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38809 states to 38809 states and 150377 transitions. [2022-12-14 09:11:52,624 INFO L78 Accepts]: Start accepts. Automaton has 38809 states and 150377 transitions. Word has length 51 [2022-12-14 09:11:52,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:52,624 INFO L495 AbstractCegarLoop]: Abstraction has 38809 states and 150377 transitions. [2022-12-14 09:11:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:52,624 INFO L276 IsEmpty]: Start isEmpty. Operand 38809 states and 150377 transitions. [2022-12-14 09:11:52,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:52,649 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:52,649 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:52,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-12-14 09:11:52,650 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:52,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1742817474, now seen corresponding path program 14 times [2022-12-14 09:11:52,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:52,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651049756] [2022-12-14 09:11:52,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:52,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:52,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:53,243 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:53,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651049756] [2022-12-14 09:11:53,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651049756] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:11:53,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:11:53,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-12-14 09:11:53,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951119971] [2022-12-14 09:11:53,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:11:53,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-12-14 09:11:53,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:53,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-12-14 09:11:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-12-14 09:11:53,244 INFO L87 Difference]: Start difference. First operand 38809 states and 150377 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:54,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:11:54,007 INFO L93 Difference]: Finished difference Result 48025 states and 184209 transitions. [2022-12-14 09:11:54,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-14 09:11:54,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 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 51 [2022-12-14 09:11:54,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:11:54,153 INFO L225 Difference]: With dead ends: 48025 [2022-12-14 09:11:54,153 INFO L226 Difference]: Without dead ends: 47997 [2022-12-14 09:11:54,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:11:54,154 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 163 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 09:11:54,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 0 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 09:11:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47997 states. [2022-12-14 09:11:54,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47997 to 38513. [2022-12-14 09:11:54,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38513 states, 38487 states have (on average 3.881492451996778) internal successors, (149387), 38512 states have internal predecessors, (149387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:55,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38513 states to 38513 states and 149387 transitions. [2022-12-14 09:11:55,046 INFO L78 Accepts]: Start accepts. Automaton has 38513 states and 149387 transitions. Word has length 51 [2022-12-14 09:11:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:11:55,046 INFO L495 AbstractCegarLoop]: Abstraction has 38513 states and 149387 transitions. [2022-12-14 09:11:55,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:11:55,046 INFO L276 IsEmpty]: Start isEmpty. Operand 38513 states and 149387 transitions. [2022-12-14 09:11:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:11:55,071 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:11:55,071 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:11:55,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-12-14 09:11:55,072 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:11:55,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:11:55,072 INFO L85 PathProgramCache]: Analyzing trace with hash 502330784, now seen corresponding path program 15 times [2022-12-14 09:11:55,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:11:55,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397373901] [2022-12-14 09:11:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:11:55,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:11:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:11:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:55,661 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:11:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397373901] [2022-12-14 09:11:55,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397373901] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:11:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689843552] [2022-12-14 09:11:55,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:11:55,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:11:55,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:11:55,663 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:11:55,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-12-14 09:11:56,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:11:56,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:11:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 28 conjunts are in the unsatisfiable core [2022-12-14 09:11:56,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:11:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:56,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:11:57,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 95 [2022-12-14 09:11:57,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 93 [2022-12-14 09:11:57,189 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:11:57,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2022-12-14 09:11:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:11:57,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689843552] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:11:57,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [901917314] [2022-12-14 09:11:57,283 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:11:57,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:11:57,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 10] total 25 [2022-12-14 09:11:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415217312] [2022-12-14 09:11:57,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:11:57,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:11:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:11:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:11:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-12-14 09:11:57,285 INFO L87 Difference]: Start difference. First operand 38513 states and 149387 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:02,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:02,647 INFO L93 Difference]: Finished difference Result 67692 states and 252931 transitions. [2022-12-14 09:12:02,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-12-14 09:12:02,648 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 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 51 [2022-12-14 09:12:02,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:02,859 INFO L225 Difference]: With dead ends: 67692 [2022-12-14 09:12:02,860 INFO L226 Difference]: Without dead ends: 67611 [2022-12-14 09:12:02,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2025, Invalid=6905, Unknown=0, NotChecked=0, Total=8930 [2022-12-14 09:12:02,861 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1063 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3898 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1063 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 4021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:02,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1063 Valid, 0 Invalid, 4021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3898 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-12-14 09:12:02,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67611 states. [2022-12-14 09:12:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67611 to 37870. [2022-12-14 09:12:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37870 states, 37847 states have (on average 3.8969799455703225) internal successors, (147489), 37869 states have internal predecessors, (147489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:03,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37870 states to 37870 states and 147489 transitions. [2022-12-14 09:12:03,876 INFO L78 Accepts]: Start accepts. Automaton has 37870 states and 147489 transitions. Word has length 51 [2022-12-14 09:12:03,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:03,876 INFO L495 AbstractCegarLoop]: Abstraction has 37870 states and 147489 transitions. [2022-12-14 09:12:03,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 25 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:03,876 INFO L276 IsEmpty]: Start isEmpty. Operand 37870 states and 147489 transitions. [2022-12-14 09:12:03,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:12:03,900 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:03,900 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:03,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-12-14 09:12:04,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:04,102 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:12:04,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 120764434, now seen corresponding path program 16 times [2022-12-14 09:12:04,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:04,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947223772] [2022-12-14 09:12:04,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:04,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:04,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:05,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947223772] [2022-12-14 09:12:05,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947223772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:12:05,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189712428] [2022-12-14 09:12:05,234 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:12:05,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:05,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:05,235 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:05,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-12-14 09:12:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:05,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-14 09:12:05,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:12:05,912 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:05,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:06,197 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-14 09:12:06,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 94 [2022-12-14 09:12:06,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 83 [2022-12-14 09:12:06,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 81 [2022-12-14 09:12:06,329 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:06,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189712428] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:12:06,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [375439143] [2022-12-14 09:12:06,330 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:12:06,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:12:06,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 22 [2022-12-14 09:12:06,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150203907] [2022-12-14 09:12:06,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:12:06,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:12:06,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:06,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:12:06,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-12-14 09:12:06,331 INFO L87 Difference]: Start difference. First operand 37870 states and 147489 transitions. Second operand has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:11,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:11,520 INFO L93 Difference]: Finished difference Result 92513 states and 341708 transitions. [2022-12-14 09:12:11,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-12-14 09:12:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-12-14 09:12:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:11,817 INFO L225 Difference]: With dead ends: 92513 [2022-12-14 09:12:11,817 INFO L226 Difference]: Without dead ends: 92432 [2022-12-14 09:12:11,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1575, Invalid=6081, Unknown=0, NotChecked=0, Total=7656 [2022-12-14 09:12:11,818 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 1152 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2855 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1152 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:11,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1152 Valid, 0 Invalid, 3045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2855 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-12-14 09:12:11,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92432 states. [2022-12-14 09:12:12,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92432 to 37852. [2022-12-14 09:12:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37852 states, 37829 states have (on average 3.896719448042507) internal successors, (147409), 37851 states have internal predecessors, (147409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37852 states to 37852 states and 147409 transitions. [2022-12-14 09:12:13,087 INFO L78 Accepts]: Start accepts. Automaton has 37852 states and 147409 transitions. Word has length 51 [2022-12-14 09:12:13,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:13,088 INFO L495 AbstractCegarLoop]: Abstraction has 37852 states and 147409 transitions. [2022-12-14 09:12:13,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.909090909090909) internal successors, (86), 22 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:13,088 INFO L276 IsEmpty]: Start isEmpty. Operand 37852 states and 147409 transitions. [2022-12-14 09:12:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 09:12:13,112 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:13,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:13,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-12-14 09:12:13,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-12-14 09:12:13,314 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:12:13,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:13,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1752101410, now seen corresponding path program 17 times [2022-12-14 09:12:13,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:13,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890818851] [2022-12-14 09:12:13,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:13,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:14,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890818851] [2022-12-14 09:12:14,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890818851] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:12:14,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665878965] [2022-12-14 09:12:14,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:12:14,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:14,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:14,057 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:14,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-12-14 09:12:14,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 09:12:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:12:14,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 09:12:14,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:12:14,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:14,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-14 09:12:14,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2022-12-14 09:12:14,570 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:14,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:14,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:14,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-14 09:12:14,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2022-12-14 09:12:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-12-14 09:12:14,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665878965] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:12:14,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077319031] [2022-12-14 09:12:14,735 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:12:14,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:12:14,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-12-14 09:12:14,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624102882] [2022-12-14 09:12:14,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:12:14,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-14 09:12:14,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:12:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-14 09:12:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=363, Unknown=4, NotChecked=0, Total=462 [2022-12-14 09:12:14,737 INFO L87 Difference]: Start difference. First operand 37852 states and 147409 transitions. Second operand has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:12:16,402 INFO L93 Difference]: Finished difference Result 56390 states and 213678 transitions. [2022-12-14 09:12:16,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 09:12:16,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 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 51 [2022-12-14 09:12:16,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:12:16,580 INFO L225 Difference]: With dead ends: 56390 [2022-12-14 09:12:16,580 INFO L226 Difference]: Without dead ends: 56309 [2022-12-14 09:12:16,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=763, Unknown=4, NotChecked=0, Total=992 [2022-12-14 09:12:16,580 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 499 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 09:12:16,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 0 Invalid, 1491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 09:12:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56309 states. [2022-12-14 09:12:17,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56309 to 36107. [2022-12-14 09:12:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36107 states, 36084 states have (on average 3.8857388316151202) internal successors, (140213), 36106 states have internal predecessors, (140213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:17,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36107 states to 36107 states and 140213 transitions. [2022-12-14 09:12:17,450 INFO L78 Accepts]: Start accepts. Automaton has 36107 states and 140213 transitions. Word has length 51 [2022-12-14 09:12:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:12:17,451 INFO L495 AbstractCegarLoop]: Abstraction has 36107 states and 140213 transitions. [2022-12-14 09:12:17,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.9545454545454546) internal successors, (87), 21 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:12:17,451 INFO L276 IsEmpty]: Start isEmpty. Operand 36107 states and 140213 transitions. [2022-12-14 09:12:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-12-14 09:12:17,473 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:12:17,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:12:17,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-12-14 09:12:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-12-14 09:12:17,675 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 116 more)] === [2022-12-14 09:12:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:12:17,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1910131019, now seen corresponding path program 1 times [2022-12-14 09:12:17,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:12:17,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299615256] [2022-12-14 09:12:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:17,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:12:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:22,285 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:12:22,285 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:12:22,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299615256] [2022-12-14 09:12:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299615256] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:12:22,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962917836] [2022-12-14 09:12:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:12:22,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:12:22,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:12:22,287 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:12:22,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f153dd31-559a-42c1-a07f-237e54888907/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-12-14 09:12:22,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:12:22,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 75 conjunts are in the unsatisfiable core [2022-12-14 09:12:22,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:12:23,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:23,809 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-12-14 09:12:23,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 58 [2022-12-14 09:12:23,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2022-12-14 09:12:24,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:24,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:12:24,439 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-12-14 09:12:24,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 88 [2022-12-14 09:12:24,471 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:12:32,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:32,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 206 treesize of output 218 [2022-12-14 09:12:32,498 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:32,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 206 [2022-12-14 09:12:32,520 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:32,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 178 [2022-12-14 09:12:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:12:33,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:12:56,914 INFO L321 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-12-14 09:12:56,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 248 treesize of output 254 [2022-12-14 09:12:56,943 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:12:56,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 252 [2022-12-14 09:12:59,097 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse9 (forall ((v_prenex_12 (Array Int Int)) (v_prenex_11 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_prenex_11))) (let ((.cse12 (store .cse13 |c_ULTIMATE.start_main_~#t3~0#1.base| v_prenex_12))) (or (= (mod (select (select .cse12 c_~ends_with_6~0.base) c_~ends_with_6~0.offset) 256) 0) (not (= (mod (select (select .cse13 c_~ends_with_10~0.base) c_~ends_with_10~0.offset) 256) 0)) (= (mod (select (select .cse12 c_~ends_with_10~0.base) c_~ends_with_10~0.offset) 256) 0)))))) (.cse10 (forall ((v_ArrVal_7543 (Array Int Int)) (v_ArrVal_7544 (Array Int Int))) (let ((.cse11 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_7543) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_7544))) (or (not (= (mod (select (select .cse11 c_~ends_with_6~0.base) c_~ends_with_6~0.offset) 256) 0)) (= (mod (select (select .cse11 c_~ends_with_10~0.base) c_~ends_with_10~0.offset) 256) 0))))) (.cse7 (not (<= 0 c_~ends_with_10~0.offset))) (.cse8 (not (<= 0 c_~ends_with_6~0.offset)))) (let ((.cse4 (and (or .cse7 .cse8 .cse9) (or .cse10 .cse7 .cse8)))) (let ((.cse0 (let ((.cse5 (+ c_~i_13~0 c_~ends_with_2~0.offset))) (or (< .cse5 0) (let ((.cse6 (not (<= 1000 c_~i_13~0)))) (and (or .cse6 .cse7 .cse8 .cse9) (or (not (= 0 (mod (select (select |c_#memory_int| c_~ends_with_2~0.base) .cse5) 256))) .cse4) (or .cse6 .cse10 .cse7 .cse8)))))) (.cse1 (or (= 0 (mod c_~break_14~0 256)) .cse4))) (let ((.cse3 (or (= c_~ends_with_6~0.base c_~ends_with_2~0.base) (and .cse0 .cse1)))) (let ((.cse2 (or (= c_~ends_with_2~0.base c_~ends_with_10~0.base) (and .cse0 .cse1 .cse3)))) (and .cse0 .cse1 .cse2 (or (and .cse0 .cse1 .cse2 .cse3) (= c_~ends_with_6~0.base c_~ends_with_10~0.base)))))))) is different from false [2022-12-14 09:13:09,982 WARN L233 SmtUtils]: Spent 6.44s on a formula simplification. DAG size of input: 100 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-14 09:13:10,718 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1267 treesize of output 1244 [2022-12-14 09:13:10,770 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1169 treesize of output 1170 [2022-12-14 09:13:10,810 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1161 treesize of output 1158 [2022-12-14 09:13:10,850 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1149 treesize of output 1154 [2022-12-14 09:13:10,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1145 treesize of output 1146 [2022-12-14 09:13:10,940 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1137 treesize of output 1140 [2022-12-14 09:13:10,988 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:10,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1131 treesize of output 1128 [2022-12-14 09:13:11,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1119 treesize of output 1120 [2022-12-14 09:13:11,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1111 treesize of output 1114 [2022-12-14 09:13:11,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1105 treesize of output 1098 [2022-12-14 09:13:11,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1089 treesize of output 1090 [2022-12-14 09:13:11,233 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1081 treesize of output 1078 [2022-12-14 09:13:11,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:13:11,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1069 treesize of output 1070 [2022-12-14 09:14:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-14 09:14:02,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962917836] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:14:02,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [477460923] [2022-12-14 09:14:02,595 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 09:14:02,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:14:02,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 71 [2022-12-14 09:14:02,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757432859] [2022-12-14 09:14:02,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:14:02,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-12-14 09:14:02,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:14:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-12-14 09:14:02,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=4705, Unknown=31, NotChecked=140, Total=5256 [2022-12-14 09:14:02,597 INFO L87 Difference]: Start difference. First operand 36107 states and 140213 transitions. Second operand has 73 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 72 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:16:42,209 WARN L233 SmtUtils]: Spent 7.26s on a formula simplification. DAG size of input: 245 DAG size of output: 202 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)